ORCID Profile
0000-0002-1029-3404
Current Organisation
Shandong University
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Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C6TA01657J
Abstract: The recent development of carbon-based catalysts for advanced electrocatalysis is summarized and discussed.
Publisher: Springer Science and Business Media LLC
Date: 08-2010
Abstract: Carbonaceous sphere@MnO 2 rattle-type hollow spheres were synthesized under mild experimental conditions. The as-prepared hollow structures were characterized using scanning electron microscope, transmission electron microscope, x-ray diffraction, x-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, Raman spectroscopy, thermogravimetric analysis, and nitrogen adsorption techniques. The characterization data showed the formation of rattle-type hollow structures with a mesoporous MnO 2 shell and a carbonaceous sphere core. The composition and shell thickness of the hollow spheres can be controlled experimentally. The capacitive performance of the hollow structures was evaluated by using both cycle voltammetry and charge–discharge methods. The results demonstrated a specific capacitance as high as 184 F/g at a current density of 125 mA/g. The good electrocapacitive performance resulted from the mesoporous structure and high surface area of the MnO 2 -based hollow spheres.
Publisher: American Chemical Society (ACS)
Date: 10-11-2015
Publisher: Elsevier BV
Date: 05-2019
Publisher: Royal Society of Chemistry (RSC)
Date: 2011
DOI: 10.1039/C0JM02806A
Publisher: Springer Science and Business Media LLC
Date: 06-04-2015
Abstract: The oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) are traditionally carried out with noble metals (such as Pt) and metal oxides (such as RuO₂ and MnO₂) as catalysts, respectively. However, these metal-based catalysts often suffer from multiple disadvantages, including high cost, low selectivity, poor stability and detrimental environmental effects. Here, we describe a mesoporous carbon foam co-doped with nitrogen and phosphorus that has a large surface area of ∼1,663 m(2) g(-1) and good electrocatalytic properties for both ORR and OER. This material was fabricated using a scalable, one-step process involving the pyrolysis of a polyaniline aerogel synthesized in the presence of phytic acid. We then tested the suitability of this N,P-doped carbon foam as an air electrode for primary and rechargeable Zn-air batteries. Primary batteries demonstrated an open-circuit potential of 1.48 V, a specific capacity of 735 mAh gZn(-1) (corresponding to an energy density of 835 Wh kgZn(-1)), a peak power density of 55 mW cm(-2), and stable operation for 240 h after mechanical recharging. Two-electrode rechargeable batteries could be cycled stably for 180 cycles at 2 mA cm(-2). We also examine the activity of our carbon foam for both OER and ORR independently, in a three-electrode configuration, and discuss ways in which the Zn-air battery can be further improved. Finally, our density functional theory calculations reveal that the N,P co-doping and graphene edge effects are essential for the bifunctional electrocatalytic activity of our material.
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/D0EE00092B
Abstract: The oxygen reduction reaction (ORR) is one of the most important electrochemical reactions in energy conversion and storage technologies, such as fuel cells and metal–air batteries.
Publisher: Royal Society of Chemistry (RSC)
Date: 2011
DOI: 10.1039/C0JM03827J
Publisher: Wiley
Date: 25-09-2015
Publisher: Elsevier BV
Date: 02-2012
Publisher: Wiley
Date: 24-04-2022
Abstract: Potassium‐ion batteries (PIBs) are a favorable alternative to lithium‐ion batteries (LIBs) for the large‐scale electrochemical storage devices because of the high natural abundance of potassium resources. However, conventional PIB electrodes usually exhibit low actual capacities and poor cyclic stability due to the large radius of potassium ions (1.39 Å). In addition, the high reactivity of potassium metal raises serious safety concerns. These characteristics seriously inhibit the practical use of PIB electrodes. Here, zinc phosphide composites are rationally designed as PIB anodes for operation in a nonflammable triethyl phosphate (TEP) electrolyte to solve the above‐mentioned issues. The optimized zinc phosphide composite with 20 wt% zinc phosphate presents a high specific capacity (571.1 mA h g −1 at 0.1 A g −1 ) and excellent cycling performance (484.9 mA h g −1 with the capacity retention of 94.5% after 1000 cycles at 0.5 A g −1 ) in the KFSI‐TEP electrolyte. XPS depth profile analysis shows that the improved cycling stability of the composite is closely related to the reversible dynamic evolutions and conversions of the sulfur‐containing species in the solid electrolyte interphase (SEI) during the charge/discharge process. This dynamic reversible SEI concept may provide a new strategy for the design of superior electrodes for PIBs.
Publisher: American Chemical Society (ACS)
Date: 22-02-2012
DOI: 10.1021/JP211474E
Publisher: Royal Society of Chemistry (RSC)
Date: 2011
DOI: 10.1039/C1EE01354H
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C1JM13872C
Publisher: Springer Science and Business Media LLC
Date: 13-09-2017
DOI: 10.1038/S41467-017-00649-7
Abstract: Graphitic carbons have been used as conductive supports for developing rechargeable batteries. However, the classic ion intercalation in graphitic carbon has yet to be coupled with extrinsic redox reactions to develop rechargeable batteries. Herein, we demonstrate the preparation of a free-standing, flexible nitrogen and phosphorus co-doped hierarchically porous graphitic carbon for iodine loading by pyrolysis of polyaniline coated cellulose wiper. We find that heteroatoms could provide additional defect sites for encapsulating iodine while the porous carbon skeleton facilitates redox reactions of iodine and ion intercalation. The combination of ion intercalation with redox reactions of iodine allows for developing rechargeable iodine–carbon batteries free from the unsafe lithium/sodium metals, and hence eliminates the long-standing safety issue. The unique architecture of the hierarchically porous graphitic carbon with heteroatom doping not only provides suitable spaces for both iodine encapsulation and cation intercalation but also generates efficient electronic and ionic transport pathways, thus leading to enhanced performance.
Publisher: American Chemical Society (ACS)
Date: 21-03-2011
DOI: 10.1021/JP200724H
Publisher: American Chemical Society (ACS)
Date: 25-09-2015
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C6EE00158K
Abstract: This review summarizes the latest developments in the functionalization of chemically derived graphene for improving its electrocapacitive performance.
Publisher: American Chemical Society (ACS)
Date: 11-09-2023
DOI: 10.1021/JACS.3C07790
Publisher: American Chemical Society (ACS)
Date: 24-11-2009
DOI: 10.1021/CM902685M
Publisher: Elsevier BV
Date: 02-2013
Publisher: Wiley
Date: 28-12-2016
Abstract: The high cost and scarcity of noble metal catalysts, such as Pt, have hindered the hydrogen production from electrochemical water splitting, the oxygen reduction in fuel cells and batteries. Herein, we developed a simple template-free approach to three-dimensional porous carbon networks codoped with nitrogen and phosphorus by pyrolysis of a supermolecular aggregate of self-assembled melamine, phytic acid, and graphene oxide (MPSA/GO). The pyrolyzed MPSA/GO acted as the first metal-free bifunctional catalyst with high activities for both oxygen reduction and hydrogen evolution. Zn-air batteries with the pyrolyzed MPSA/GO air electrode showed a high peak power density (310 W g(-1) ) and an excellent durability. Thus, the pyrolyzed MPSA/GO is a promising bifunctional catalyst for renewable energy technologies, particularly regenerative fuel cells.
Publisher: American Association for the Advancement of Science (AAAS)
Date: 07-08-2015
Abstract: A review of the recent advances, along with perspectives and challenges, in the fast-growing field of carbon-based electrocatalysts.
Publisher: Wiley
Date: 06-10-2016
Abstract: Electrocatalysts are required for clean energy technologies (for ex le, water-splitting and metal-air batteries). The development of a multifunctional electrocatalyst composed of nitrogen, phosphorus, and fluorine tri-doped graphene is reported, which was obtained by thermal activation of a mixture of polyaniline-coated graphene oxide and ammonium hexafluorophosphate (AHF). It was found that thermal decomposition of AHF provides nitrogen, phosphorus, and fluorine sources for tri-doping with N, P, and F, and simultaneously facilitates template-free formation of porous structures as a result of thermal gas evolution. The resultant N, P, and F tri-doped graphene exhibited excellent electrocatalytic activities for the oxygen reduction reaction (ORR), oxygen evolution reaction (OER), and hydrogen evolution reaction (HER). The trifunctional metal-free catalyst was further used as an OER-HER bifunctional catalyst for oxygen and hydrogen gas production in an electrochemical water-splitting unit, which was powered by an integrated Zn-air battery based on an air electrode made from the same electrocatalyst for ORR. The integrated unit, fabricated from the newly developed N, P, and F tri-doped graphene multifunctional metal-free catalyst, can operate in ambient air with a high gas production rate of 0.496 and 0.254 μL s
Publisher: IOP Publishing
Date: 25-03-2011
DOI: 10.1088/0957-4484/22/12/125703
Abstract: Hydrous manganese dioxide nanostructures were synthesized via a catalytic oxidation reaction mechanism at mild temperatures. It was found that the morphology of the manganese dioxide nanostructures was significantly influenced by the pH of the reaction system. With increasing pH the morphology of manganese dioxide nanostructures changed from urchin-like structures to nanobelts. The capacitive performance was investigated by using cycle voltammetry and galvanostatic charge/discharge techniques. Hydrous manganese dioxide nanostructures obtained from a basic solution exhibited a capacitance of 262 F g − 1 at a current density of 250 mA g − 1 and a capacitive retention of 75% after 1200 cycles, suggesting that this is a promising electrode material for supercapacitors. The high specific capacitance is attributed to the hydrous nature coupled with a high surface area (181 m 2 g − 1 ) of the manganese dioxide nanostructure.
Publisher: Wiley
Date: 15-09-2021
Abstract: As anodes for metal‐ion batteries, metal phosphides usually suffer from severe capacity degradation because of their huge volume expansion and unstable solid electrolyte interphase (SEI), especially for potassium‐ion batteries (PIBs). To address these issues, this study proposes amorphous phosphates acting as buffer materials. Ten types of metal phosphide composites embedded with in situ‐formed amorphous phosphates are prepared by one‐step ball milling using red phosphorus (RP) and the corresponding metal oxides (MOs) as starting materials. A zinc phosphide composite is selected for further study as a PIB anode. Benefitting from the effective suppression of volume variation, a KF‐rich SEI is formed on the electrode surface in the KFSI‐based electrolyte. The zinc phosphide composite exhibits a high reversible specific capacity and outstanding long‐term cycling stability (476 mAh g −1 over 350 cycles at 0.1 A g −1 after going through a rate capability test and 177 mAh g −1 after 6000 cycles at 1.0 A g −1 ) and thus achieves the best cycling performance among all reported metal phosphide‐based anodes for PIBs. This study highlights a low‐cost and effective strategy to guide the development of metal phosphides as high‐performance anodes for PIBs.
Publisher: American Chemical Society (ACS)
Date: 28-07-2010
DOI: 10.1021/JP105146C
Publisher: Wiley
Date: 30-04-2012
Abstract: Supercapacitors, which are attracting rapidly growing interest from both academia and industry, are important energy-storage devices for acquiring sustainable energy. Recent years have seen a number of significant breakthroughs in the research and development of supercapacitors. The emergence of innovative electrode materials (e.g., graphene) has clearly provided great opportunities for advancing the science in the field of electrochemical energy storage. Conversely, smart configurations of electrode materials and new designs of supercapacitor devices have, in many cases, boosted the electrochemical performance of the materials. We attempt to summarize recent research progress towards the design and configuration of electrode materials to maximize supercapacitor performance in terms of energy density, power density, and cycle stability. With a brief description of the structure, energy-storage mechanism, and electrode configuration of supercapacitor devices, the design and configuration of symmetric supercapacitors are discussed, followed by that of asymmetric and hybrid supercapacitors. Emphasis is placed on the rational design and configuration of supercapacitor electrodes to maximize the electrochemical performance of the device.
Publisher: Elsevier BV
Date: 09-2016
Location: United States of America
No related grants have been discovered for Jintao Zhang.