ORCID Profile
0000-0002-9122-7598
Current Organisation
Central South University
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Publisher: IOP Publishing
Date: 11-07-2022
Abstract: Lithium-ion batteries have achieved huge success in the field of energy storage, but they use flammable electrolytes that may cause safety issue. Solid polymer electrolytes have been considered as the final solution to this safety issue, which have received many researchers’ attention. However, solid polymer electrolytes still face several challenges, such as low ionic conductivity. Herein, we report a quaternary solid polymer electrolyte to achieve high ionic conductivity, which was synthesized by one-step casting method. This quaternary electrolyte contains two polymers (poly(vinylidene fluoride-co-hexafluoropropylene) and poly(ethylene oxide) diacrylate), one plasticizer (succinonitrile), and one lithium salt (lithium bis(trifluoromethane)sulfonimide). Long-chain polymer is used as matrix, and short-chain polymer and plasticizer are used to increase ionic conductivity. This quaternary electrolyte achieves a high ionic conductivity of 1.49 × 10 −4 S cm −1 at room temperature. When assembled into coin cell with lithium iron phosphate cathode and lithium metal anode, this quaternary electrolyte achieves a capacity of 139 mAh g −1 at 0.2 C after 50 cycles and 106 mAh g −1 at 1 C after 160 cycles. Moreover, this facile one-step casting method provides a new route towards the development of solid polymer electrolytes.
Publisher: Elsevier BV
Date: 10-2023
Publisher: Wiley
Date: 05-01-2023
Abstract: Sodium‐ion batteries (SIBs) have inspired the potential for widespread use in energy storage owing to the advantages of abundant resources and low cost. Benefiting from the layered structure, 2D‐layered materials enable fast interlayer transport of sodium ions and thus are considered promising candidates as anodes for SIBs. Herein, a strategy of adjusting crystal orientation is proposed via a solvothermal method to improve sodium‐ion transport at the edge of the interlayers in 2D‐layered materials. By introducing surfactants and templates, the 2D‐layered V 5 S 8 nanosheets are controlled to align the interlayer diffusion channels vertically to the surface, which promotes the fast transport of Na + at the edge of the interlayers as revealed by experimental methods and ab initio calculations. Benefiting from the aligned crystal orientation and rGO coating, the vertical‐V 5 S 8 @rGO hybrid delivers a high initial discharge capacity of 350.6 mAh g −1 at a high current density of 15 A g −1 . This work provides a strategy for the structural design of 2D‐layered anode materials by adjusting crystal orientation, which demonstrates the promise for applications in fast‐charging alkaline‐ion batteries.
Publisher: Elsevier BV
Date: 12-2023
Publisher: Elsevier BV
Date: 2023
Publisher: Elsevier BV
Date: 11-2022
Publisher: Royal Society of Chemistry (RSC)
Date: 2022
DOI: 10.1039/D2TA04015H
Abstract: The zinc l -cysteine functional layer was constructed by in situ etching Zn anode in 1 M l -cysteine solution. This functional layer not only improves the hydrophobicity and corrosion resistance of zinc anode, but also guides uniform zinc deposition.
Publisher: Elsevier BV
Date: 09-2019
Publisher: Elsevier BV
Date: 12-2022
Publisher: Elsevier BV
Date: 10-2022
Publisher: Elsevier BV
Date: 08-2023
No related grants have been discovered for Xiahui Zhang.