ORCID Profile
0000-0002-1947-5079
Current Organisation
University of Wollongong
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Publisher: No publisher found
Publisher: American Chemical Society (ACS)
Date: 27-02-2023
Publisher: No publisher found
Publisher: No publisher found
Publisher: Royal Society of Chemistry (RSC)
Date: 26-08-2014
DOI: 10.1039/C4TA04321A
Publisher: Wiley
Date: 13-08-2018
Publisher: Wiley
Date: 10-10-2018
Abstract: Sodium-ion batteries (SIBs) have drawn remarkable attention due to their low cost and the practically inexhaustible sodium sources. The major obstacle for the practical application of SIBs is the absence of suitable negative electrode materials with long cycling stability and high rate performance. Here, sulfur-doped double-shell sodium titanate (Na
Publisher: Royal Society of Chemistry (RSC)
Date: 2022
DOI: 10.1039/D1TA09516A
Abstract: TiO 2 is used as a model to illustrate the binder chemistry in ethers by polyvinylidene difluoride (PVdF) and sodium carboxymethyl cellulose (CMC). The worse performance of PVdF is due to the defluorination reaction and the adhesion loss.
Publisher: Elsevier BV
Date: 02-2014
Publisher: American Chemical Society (ACS)
Date: 08-12-2017
Abstract: Flower-like assembly of ultrathin nanosheets composed of anatase and bronze TiO
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5TA06080J
Abstract: Triple-walled SnO 2 @N-doped carbon@SnO 2 nanotubes combine the good electronic conductivity and hollow structure from N-doped carbon, and the high-density loading from SnO 2 nanoparticles, achieving superior electrochemical performance for lithium and sodium storage.
Publisher: No publisher found
Publisher: Elsevier BV
Date: 2018
Publisher: Elsevier BV
Date: 08-2022
Publisher: Elsevier BV
Date: 08-2016
Publisher: No publisher found
Publisher: MDPI AG
Date: 11-04-2022
Abstract: Zeolitic Imidazolate Framework 67 (ZIF-67) and its derivates have attracted extensive interest for lithium-ion batteries (LIBs). Here, Cerium-doped cobalt phosphide@nitrogen-doped carbon (Ce-doped CoP@NC) with hollow polyhedron structure materials were successfully synthesized via ionic-exchange with Co and Ce ions using the ZIF-67 as a template followed with a facile low-temperature phosphorization treatment. Benefitting from the well-designed hollow polyhedron, steady carbon network, and Ce-doping structural merits, the as-synthesized Ce-doped CoP@NC electrode demonstrated superior performance as the anode in LIBs: a superior cyclability (400 mA h g−1 after 500 cycles) and outstanding rate-capability (590 mA h g−1, reverted to 100 mA g−1). These features not only produced more lithium-active sites for LIBs anode and a shorter Li-ion diffusion pathway to expedite the charge transfer, but also the better tolerance against volume variation of CoP during the repeated lithiation/delithiation process and greater electronic conductivity properties. These results provide a methodology for the design of well-organized ZIFs and rare earth element-doped transition metal phosphate with a hollow polyhedron structure.
Publisher: Wiley
Date: 07-04-2023
Abstract: Aqueous zinc‐ion batteries (ZIBs) enjoy a good reputation for being safe, affordable to produce, and ecologically friendly due to the use of water‐based electrolytes. The main factors restricting the development of ZIBs, however, are the negative effects of dendrite deposition on the zinc anode and the dissolution of common cathodes such as Mn and V‐based cathodes. Various techniques have been used to address these issues, including regulating the electrolyte concentration or solvation structure, developing a coating or current collector to lessen anode dendrite growth, and improving the structural stability of the cathode. Recently, functionalized separator strategies have gained popularity as effective ways to improve ZIB performance. The use of a functionalized separator is also a practical technique to save costs and increase the volumetric energy density of the battery by substituting a functionalized separator for the usual thick and expensive glass fiber separator. The development of functionalized separators in ZIBs is the subject of ongoing research, and this work presents the most recent findings in a systematic manner, focusing on both the effects and the methods to prepare or modify them. Finally, a brief explanation of the constraints and future potential of current functionalized separator development is provided.
Publisher: Wiley
Date: 07-05-2021
Abstract: Sodium‐ion batteries (SIBs), as next‐generation energy storage devices, can be made by a similar production process to lithium‐ion batteries (LIBs). The key to accelerating their commercialization is to discover appropriate high‐performance electrode materials with low cost, nontoxicity, and simple synthetic features. Herein, layered‐structure Na 2 Ti 3 O 7 , with the advantages of appropriate charge/discharge plateaus, superior stability, environmental friendliness, and ease of preparation using cheap raw materials, is selected for assembly in full‐cell battery packs to evaluate its suitability for practical application. When evaluated in a coin cell, it has a capacity of 77.2 mAh g −1 at 1 A g −1 after 10 000 cycles with capacity retention of 99.9%, demonstrating its excellent stability. In the case of a soft‐pack battery, it retains 22.3 mAh g −1 at 0.1 A g −1 and 18.1 mAh g −1 at 0.05 A g −1 after 50 cycles. After cycling, there is no sodium dendrite formation or active material shedding, further confirming its safety in practical application. Therefore, Na 2 Ti 3 O 7 as another intercalation/deintercalation mechanism material has application potential in the future.
Publisher: Elsevier BV
Date: 02-2019
Publisher: Elsevier BV
Date: 07-2020
Publisher: Wiley
Date: 27-10-2021
Abstract: One dimensional Fe 7 S 8 @N−C nanocomposite, consisting of Fe 7 S 8 nanoparticles homogeneously embedded in N‐doped carbon nanowires, was synthesized by a facile hydrothermal‐annealing process. As an anode material for sodium‐ion batteries, the electrode exhibited capacities of 481 mA h g −1 after 1000 cycles at 5 A g −1 and 591 mA h g −1 at 200 mA g −1 with a retention ratio of 91 %. The excellent rate performance and cycling stability can be attributed to the synergistic effects of the one‐dimensional N‐doped carbon and ultra‐small Fe 7 S 8 particles, which will improve electrical conductivity and alleviate the volume expansion of the electrode during cycling. This work will afford a great reference for further development of iron sulfides‐based anode materials towards high‐performance sodium‐ion batteries.
Publisher: Wiley
Date: 03-0066
Publisher: American Chemical Society (ACS)
Date: 04-10-2018
Publisher: Elsevier BV
Date: 11-2015
Publisher: American Chemical Society (ACS)
Date: 04-02-2022
DOI: 10.1021/ACS.NANOLETT.1C04975
Abstract: Metallic Zn as a promising anode material of aqueous batteries suffers from severe parasitic reactions and notorious dendrite growth. To address these issues, the desolvation and nucleation processes need to be carefully regulated. Herein, Zn foils coated by ZnF
Publisher: Wiley
Date: 22-12-2022
Abstract: The applications of alloy‐type anode materials for Na‐ion batteries are always obstructed by enormous volume variation upon cycles. Here, K + ions are introduced as an electrolyte additive to improve the electrochemical performance via electrostatic shielding, using Sn microparticles (μ‐Sn) as a model. Theoretical calculations and experimental results indicate that K + ions are not incorporated in the electrode, but accumulate on some sites. This accumulation slows down the local sodiation at the “hot spots”, promotes the uniform sodiation and enhances the electrode stability. Therefore, the electrode maintains a high specific capacity of 565 mAh g −1 after 3000 cycles at 2 A g −1 , much better than the case without K + . The electrode also remains an areal capacity of ≈3.5 mAh cm −2 after 100 cycles. This method does not involve time‐consuming preparation, sophisticated instruments and expensive reagents, exhibiting the promising potential for other anode materials.
Publisher: Elsevier BV
Date: 04-2016
Publisher: Elsevier BV
Date: 06-2023
Publisher: Wiley
Date: 28-07-2021
Abstract: The potential of germanium‐based anodes for sodium‐ion batteries (NIBs) is seriously hindered by the high diffusion barrier of Na ions in the Ge lattice. Herein, a massive and defect‐rich 2D germanene nanosheet based anode is fabricated and exhibits enhanced Na‐storage performance for NIBs. Unlike the typical alloying/dealloying reactions of crystalline Ge, the germanene nanosheets are converted to go through a pseudointercalation mechanism during charge/discharge processes. Accordingly, the diffusion energy barriers of sodium atoms in the germanene nanosheets are significantly reduced, leading to high Na‐storage activity. Combined with its large surface area, high mechanical flexibility, fast electron mobility as well as its defect‐rich structure, the germanene anode delivers an initial capacity of 695 mAh g −1 , enhanced cycling performance, and outstanding rate capacities, compared with those of GeH nanosheets and Ge particles. It is believed that the germanene anode not only extends the scope of germanene application, but also provides new insights for adjusting Na‐storage pathways toward superior battery performance.
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/C9TA13377A
Abstract: 3DOM MoSe 2 @C constructed by ultrathin MoSe 2 nanosheets strongly binging on 3DOM carbon skeleton exerts high energy and power density for sodium-ion batteries.
Publisher: Springer Science and Business Media LLC
Date: 26-07-2021
DOI: 10.1038/S41467-021-24873-4
Abstract: Increasing the energy density of lithium-sulfur batteries necessitates the maximization of their areal capacity, calling for thick electrodes with high sulfur loading and content. However, traditional thick electrodes often lead to sluggish ion transfer kinetics as well as decreased electronic conductivity and mechanical stability, leading to their thickness-dependent electrochemical performance. Here, free-standing and low-tortuosity N, O co-doped wood-like carbon frameworks decorated with carbon nanotubes forest (WLC-CNTs) are synthesized and used as host for enabling scalable high-performance Li-sulfur batteries. EIS-symmetric cell examinations demonstrate that the ionic resistance and charge-transfer resistance per unit electro-active surface area of S@WLC-CNTs do not change with the variation of thickness, allowing the thickness-independent electrochemical performance of Li-S batteries. With a thickness of up to 1200 µm and sulfur loading of 52.4 mg cm −2 , the electrode displays a capacity of 692 mAh g −1 after 100 cycles at 0.1 C with a low E/S ratio of 6. Moreover, the WLC-CNTs framework can also be used as a host for lithium to suppress dendrite growth. With these specific lithiophilic and sulfiphilic features, Li-S full cells were assembled and exhibited long cycling stability.
Publisher: No publisher found
Publisher: American Chemical Society (ACS)
Date: 23-02-2018
Abstract: Room-temperature sodium-ion batteries have been regarded as promising candidates for grid-scale energy storage due to their low cost and the wide distribution of sodium sources. The main scientific challenge for their practical application is to develop suitable anodes with long-term cycling stability and high rate capacity. Here, novel hierarchical three-dimensional porous carbon materials are synthesized through an in situ template carbonization process. Electrochemical examination demonstrates that carbonization temperature is a key factor that affects Na
Publisher: Wiley
Date: 13-10-2022
Abstract: Na‐ion battery has the potential to be one of the best types of next‐generation energy storage devices by virtue of their cost and sustainability advantages. With the demand for high safety, the replacement of traditional organic electrolytes with polymer electrolytes can avoid electrolyte leakage and thermal instability. Polymer electrolytes, however, suffer from low ionic conductivity and large interfacial impedance. Gel polymer electrolytes (GPEs) represent an excellent balance that combines the advantages of high ionic conductivity, low interfacial impedance, high thermal stability, and flexibility. This short review summarizes the recent progress on gel polymer Na‐ion batteries, focusing on different preparation approaches and the resultant physical and electrochemical properties. Reasons for the differences in ionic conductivity, mechanical properties, interfacial properties, and thermal stability are discussed at the molecular level. This Review may offer a deep understanding of sodium‐ion GPEs and may guide the design of intermolecular interactions for high‐performance gel polymer Na‐ion batteries.
Publisher: Wiley
Date: 21-01-2022
DOI: 10.1002/CEY2.163
Abstract: Molybdenum disulfide/carbon nanotubes assembled by ultrathin nanosheets are synthesized to illustrate the electrolyte salt chemistry via potassium bis‐(fluorosulfonyl)imide (KFSI) versus potassium hexafluorophosphate (KPF 6 ). Compared to the case of KPF 6 , the electrochemical performances using KFSI as the electrolyte salt are greatly improved: ~275 mAh g −1 after 15,000 cycles at 1 A g −1 , or ~172 mAh g −1 even at 40 A g −1 . These results represent one of the best performances for the reported anode materials. The enhanced performances could be attributed to the FSI‐induced changes in the solvate structures, that is, a large solvation energy, a high lowest unoccupied molecular orbital, and a small bonding dissociation energy of S–F. In this case, a uniform and robust solid–electrolyte interphase (SEI) is produced, improving the mechanical properties and the interface integrity. Then, the uncontrollable fracture and repeated growth of SEI, which always lead to the dissolution of sulfur species and the blockage of charge transfer in the case of KPF 6 , are well inhibited. This similar enhancement works for other sulfides by KFSI, demonstrating the general importance of this electrolyte salt chemistry.
Publisher: Elsevier BV
Date: 12-2014
Publisher: Elsevier BV
Date: 2020
Publisher: American Chemical Society (ACS)
Date: 30-12-2016
Abstract: Development of high energy ower density and long cycle life of anode materials is highly desirable for sodium ion batteries, because graphite anode cannot be used directly. Sb stands out from the potential candidates, due to high capacity, good electronic conductivity, and moderate sodiation voltage. Here, one-dimensional yolk-shell Sb@Ti-O-P nanostructures are synthesized by reducing core-shell Sb
Publisher: Wiley
Date: 30-01-2022
Abstract: Increasing the energy density and long‐term cycling stability of lithium‐ion batteries necessitates the stability of electrolytes under high/low voltage application and stable electrode/electrolyte interfacial contact. However, neither a single polymer nor liquid electrolyte can realize this due to their limited internal energy gap, which cannot avoid lithium‐metal deposition and electrolyte oxidation simultaneously. Herein, a novel type of quasi‐double‐layer composite polymer electrolytes (QDL‐CPEs) is proposed by using plasticizers with high oxidation stability (propylene carbonate) and high reduction stability (diethylene glycol dimethyl ether) in a poly(vinylidene fluoride) (PVDF)‐based electrolyte composites. In‐situ‐polymerized propylene carbonate can function as a cathode electrolyte interface (CEI) film, which can enhance the antioxidant ability. The nucleophilic substitution reaction between diethylene glycol dimethyl ether and PVDF increases the reduction stability of the electrolyte on the anodic side, without the formation of lithium dendrites. The QDL‐CPEs has high ionic conductivity, an enhanced electrochemical reaction window, adjustable electrode/electrolyte interphases, and no additional electrolyte–electrolyte interfacial resistance. Thus, this ingenious design of the QDL‐CPEs improves the cycling performance of a fabricated LiNi 0.8 Co 0.1 Mn 0.1 O 2 (NCM811)//QDL‐CPEs//hard carbon full cell at room temperature, paving a new way for designing solid‐state battery systems accessible for practical applications.
Publisher: No publisher found
Publisher: Elsevier BV
Date: 12-2021
Publisher: American Chemical Society (ACS)
Date: 04-04-2018
Abstract: Lithium-sulfur (Li-S) batteries have received tremendous attention because of their extremely high theoretical capacity (1672 mA h g
Publisher: Springer Science and Business Media LLC
Date: 27-04-2020
Publisher: Elsevier BV
Date: 2022
Publisher: MDPI AG
Date: 18-01-2023
Abstract: We recently published the first volume of the Special Issue “Emerging Low-Dimensional Materials” [...]
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5RA07394D
Abstract: Mn 3 O 4 @C core–shell nanorods present 765 mA h g −1 after 100 cycles at a current density of 500 mA g −1 .
Publisher: Elsevier BV
Date: 05-2022
Publisher: Springer Science and Business Media LLC
Date: 04-05-2021
DOI: 10.1007/S40820-021-00648-W
Abstract: This work reports influence of two different electrolytes, carbonate ester and ether electrolytes, on the sulfur redox reactions in room-temperature Na–S batteries. Two sulfur cathodes with different S loading ratio and status are investigated. A sulfur-rich composite with most sulfur dispersed on the surface of a carbon host can realize a high loading ratio (72% S). In contrast, a confined sulfur s le can encapsulate S into the pores of the carbon host with a low loading ratio (44% S). In carbonate ester electrolyte, only the sulfur trapped in porous structures is active via ‘solid–solid’ behavior during cycling. The S cathode with high surface sulfur shows poor reversible capacity because of the severe side reactions between the surface polysulfides and the carbonate ester solvents. To improve the capacity of the sulfur-rich cathode, ether electrolyte with NaNO 3 additive is explored to realize a ‘solid–liquid’ sulfur redox process and confine the shuttle effect of the dissolved polysulfides. As a result, the sulfur-rich cathode achieved high reversible capacity (483 mAh g −1 ), corresponding to a specific energy of 362 Wh kg −1 after 200 cycles, shedding light on the use of ether electrolyte for high-loading sulfur cathode.
Publisher: American Chemical Society (ACS)
Date: 06-02-2019
DOI: 10.1021/ACS.NANOLETT.8B05189
Abstract: Sodium-ion battery (SIB) as one of the most promising large-scale energy storage devices has drawn great attention in recent years. However, the development of SIBs is limited by the lacking of proper anodes with long cycling lifespans and large reversible capacities. Here we present rational synthesis of Rayleigh-instability-induced bismuth nanorods encapsulated in N-doped carbon nanotubes (Bi@N-C) using Bi
Publisher: American Chemical Society (ACS)
Date: 02-12-2022
Publisher: Elsevier BV
Date: 08-2018
Publisher: No publisher found
DOI: 10.1039/C9TA13377A}
Publisher: Elsevier BV
Date: 08-2020
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/C9EE03251G
Abstract: Developing novel gold nanoclusters as an electrocatalyst can facilitate a completely reversible reaction between S and Na, achieving advanced high-energy-density room-temperature sodium–sulfur batteries.
Publisher: Wiley
Date: 29-02-2016
Abstract: Double-walled Sb@TiO2- x nanotubes take full advantage of the high capacity of Sb, the good stability of TiO2- x , and their unique interaction, realizing excellent electrochemical performance both in lithium-ion batteries and sodium-ion batteries.
Publisher: Royal Society of Chemistry (RSC)
Date: 27-08-2014
DOI: 10.1039/C4TA03924F
Publisher: No publisher found
DOI: 10.1039/C9EE03251G}
Publisher: Wiley
Date: 22-12-2022
Abstract: The applications of alloy‐type anode materials for Na‐ion batteries are always obstructed by enormous volume variation upon cycles. Here, K + ions are introduced as an electrolyte additive to improve the electrochemical performance via electrostatic shielding, using Sn microparticles (μ‐Sn) as a model. Theoretical calculations and experimental results indicate that K + ions are not incorporated in the electrode, but accumulate on some sites. This accumulation slows down the local sodiation at the “hot spots”, promotes the uniform sodiation and enhances the electrode stability. Therefore, the electrode maintains a high specific capacity of 565 mAh g −1 after 3000 cycles at 2 A g −1 , much better than the case without K + . The electrode also remains an areal capacity of ≈3.5 mAh cm −2 after 100 cycles. This method does not involve time‐consuming preparation, sophisticated instruments and expensive reagents, exhibiting the promising potential for other anode materials.
Publisher: American Chemical Society (ACS)
Date: 16-07-2019
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D1EE01341F
Abstract: The “host” modification strategy can guide homogeneous Na deposition, suppress dendrite formation and mitigate volume fluctuation. This work reviews the research progress of various skeleton materials for sodium metal anodes in recent years.
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5RA11267B
Abstract: Hierarchical MnO 2 @NiO nanostructures present 939 mA h g −1 at 1 A g −1 after 200 cycles which is higher than in idual MnO 2 and NiO.
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5TA00828J
Abstract: Porous MnFe 2 O 4 microrods exhibit 630 mA h g −1 after 1000 cycles at 1 A g −1 and high coulombic efficiency ( %).
Publisher: MDPI AG
Date: 29-04-2020
DOI: 10.3390/APP10093098
Abstract: Limited by the development of energy storage technology, the utilization ratio of renewable energy is still at a low level. Lithium/sodium ion batteries (LIBs/SIBs) with high-performance electrochemical performances, such as large-scale energy storage, low costs and high security, are expected to improve the above situation. Currently, developing anode materials with better electrochemical performances is the main obstacle to the development of LIBs/SIBs. Recently, a variety of studies have focused on cobalt-based anode materials applied for LIBs/SIBs, owing to their high theoretical specific capacity. This review systematically summarizes the recent status of cobalt-based anode materials in LIBs/SIBs, including Li+/Na+ storage mechanisms, preparation methods, applications and strategies to improve the electrochemical performance of cobalt-based anode materials. Furthermore, the current challenges and prospects are also discussed in this review. Benefitting from these results, cobalt-based materials can be the next-generation anode for LIBs/SIBs.
Publisher: Elsevier BV
Date: 07-2018
Publisher: American Chemical Society (ACS)
Date: 08-05-2015
Abstract: Rational design and delicate control on the component, structure, and surface of electrodes in lithium ion batteries are highly important to their performances in practical applications. Compared with various components and structures for electrodes, the choices for their surface are quite limited. The most widespread surface for numerous electrodes, a carbon shell, has its own issues, which stimulates the desire to find another alternative surface. Here, hydrogenated TiO2 is exemplified as an appealing surface for advanced anodes by the growth of ultrathin hydrogenated TiO2 branches on Mn3O4 nanorods. High theoretical capacity of Mn3O4 is well matched with low volume variation (∼4%), enhanced electrical conductivity, good cycling stability, and rate capability of hydrogenated TiO2, as demonstrated in their electrochemical performances. The proof-of-concept reveals the promising potential of hydrogenated TiO2 as a next-generation material for the surface in high-performance hybrid electrodes.
Publisher: Elsevier BV
Date: 12-2019
Publisher: Wiley
Date: 08-04-2022
Abstract: Rechargeable proton batteries are attractive, because protons as a charge carrier have a small ionic radius, a lightest mass, and a high abundance on Earth. MoO 3 , as one of the promising anode materials in rechargeable proton batteries, suffers from the severe dissolution in acidic electrolytes upon cycling. Here, an ultrathin TiO 2 shell is coated on MoO 3 nanorods to suppress the detrimental dissolution during cycles. TiO 2 also lowers the desolvation energy of hydrated protons, promoting the reaction kinetics. As a result, MoO 3 @TiO 2 displays outstanding electrochemical performance, especially at high rates (171.0 mAh g −1 at 30 A g −1 ) and at high mass loadings (17 mAh cm −2 at 104 mg cm −2 ). The full cells constructed with MnO 2 deliver an energy density up to 252.9 Wh kg −1 and a power density of 18.3 kW kg −1 . Ex situ X‐ray diffraction and X‐ray photoelectron spectroscopy indicate that protons shuttle back and forth between different monoclinic phases. The results offer a simple way to achieve the high performance of MoO 3 in a diluted acidic solution.
Publisher: Wiley
Date: 15-08-2021
Abstract: Sn‐based composites are considered as one of the promising anode materials for sodium‐ion batteries (SIBs) due to their high theoretical capacities and suitable operation voltages. However, they suffer the huge volume change and unstable electrolyte/electrode interface during sodiation/desodiation, which causes structure collapse and serious capacity loss. In the past few years, great efforts have been made to ameliorate the performances of Sn by rationally designing electrode structures/components or optimizing electrolyte composition. Here, the underlying sodium‐storage reactions in Sn are summarized based on the results from theoretical calculations and advanced characterizations. Then, the recent progresses of Sn‐based composites, i.e ., Sn‐based alloys, Sn/C composites, and Sn oxides/sulfides, with various structures for SIBs are discussed in details. After that, how the electrolyte affects solid‐electrolyte interphase and the electrochemical performances is shown. Finally, the future directions for the applications of Sn‐based composites in SIBs are suggested. Hence, this review provides a comprehensive scenario about the applications of Sn‐based composites in SIBs. It will benefit the future development of alloy‐type anodes in SIBs.
Publisher: Springer Science and Business Media LLC
Date: 04-03-2017
Publisher: MDPI AG
Date: 24-09-2023
Publisher: Wiley
Date: 21-02-2022
Abstract: It is vital to dynamically regulate S activity to achieve efficient and stable room‐temperature sodium–sulfur (RT/Na−S) batteries. Herein, we report using cobalt sulfide as an electron reservoir to enhance the activity of sulfur cathodes, and simultaneously combining with cobalt single atoms as double‐end binding sites for a stable S conversion process. The rationally constructed CoS 2 electron reservoir enables the straight reduction of S to short‐chain sodium polysulfides (Na 2 S 4 ) via a streamlined redox path through electron transfer. Meanwhile, cobalt single atoms synergistically work with the electron reservoir to reinforce the streamlined redox path, which immobilize in situ formed long‐chain products and catalyze their conversion, thus realizing high S utilization and sustainable cycling stability. The as‐developed sulfur cathodes exhibit a superior rate performance of 443 mAh g −1 at 5 A g −1 with a high cycling capacity retention of 80 % after 5000 cycles at 5 A g −1 .
Publisher: Elsevier BV
Date: 2018
Publisher: Wiley
Date: 21-04-2017
Publisher: No publisher found
Publisher: No publisher found
Publisher: No publisher found
Publisher: Elsevier BV
Date: 05-2014
Publisher: Elsevier BV
Date: 09-2022
Publisher: Royal Society of Chemistry (RSC)
Date: 2022
DOI: 10.1039/D1EE03624F
Abstract: The intercalation of n -butylamine into layer-structured α -ZrP benefits the formation of a dense layer, reduces the transfer barrier of Zn 2+ and increases the local concentration of Zn 2+ , leading to enhanced electrochemical performances for Zn anodes.
Publisher: Springer Science and Business Media LLC
Date: 21-09-2020
Publisher: Wiley
Date: 24-02-2020
Abstract: Potassium ion batteries (PIBs), as a promising next‐generation electrochemical energy storage device, have drawn great attention in recent years due to the low price and abundant reserves of potassium resource. However, the severe electrode pulverization caused by repeatedly insertion/extraction of large radius of K + hinders their application. Herein a novel strategy is employed to fabricate hierarchical macroporous hybrid composite, ultrathin MoSe 2 nanosheets vertical growth on three‐dimension nitrogen‐doped cross‐linked macroporous carbon (HM‐MoSe 2 /N−C), via a template route and subsequent selenization process to alleviate the volume expansion and structure pulverization of the electrode. The electrochemical results demonstrate that the HM‐MoSe 2 /N−C is a good anode for PIBs including high specific capacity (222.8 mA h g −1 at 0.1 A g −1 ), superior rate capability, and long‐term cycling stability (172.5 mA h g −1 at 0.5 A g −1 after 400 cycles). The extraordinary electrochemical performance of this HM‐MoSe 2 /N−C electrode is attributed to the elegant and adequate nanostructure design, which can offer abundant exposed active sites (ultrathin MoSe 2 nanosheets), adequate volume accommodation (3D interconnected macropores), and highly conductive carbon frame with fast ion diffusion.
Publisher: No publisher found
No related grants have been discovered for NANA WANG.