Construction of Hierarchical Flower-Shaped (NH4)2V3O8/rGO with Enhanced Zinc Storage Performance**

被引：2
作者：
Pan, Zikang [1 ,2 ]
Ru, Qiang [1 ,2 ,3 ]
Zheng, Minghui [1 ,2 ]
Xu, Wengang [1 ,2 ]
Wu, Jinlin [1 ,2 ]
Zhang, Jun [4 ]
Chi-Chun Ling, Francis [5 ]
Wie, Li [6 ]
机构：
[1] Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials, Guangdong Engineering Technology Research Center of Efficient Green, Energy and Environment Protection Materials, Guangdong Provincial Key Laboratory of Nuclear Science, Scho
[2] Guangdong-Hong Kong Joint Laboratory of Quantum Matter, Frontier Research Institute for Physics, South China Normal University, Guangzhou
[3] SCNU Qingyuan Institute of Science and Technology Innovation Co., Ltd., Qingyuan
[4] School of Physical Science and Technology, Lingnan Normal University, 29 Cunjin Road, Zhanjiang
[5] Department of Physics, The University of Hong Kong
[6] School of Chemical and Biomolecular Engineering, The University of Sydney
来源：
ChemElectroChem | 2021年 / 8卷 / 23期
关键词：
(NH[!sub]4[!/sub])[!sub]2[!/sub]V[!sub]3[!/sub]O[!sub]8[!/sub]/rGO cathode; aqueous zinc-ion batteries; hierarchical flower-shaped structure; prominent pseudocapacitance; quasi-solid-state zinc-ion batteries;
D O I：
10.1002/celc.202101245
中图分类号：
学科分类号：
摘要：
Vanadium-based cathode materials are being widely investigated in aqueous zinc-ion batteries (ZIBs) due to their high specific capacity. However, poor cycling stability and low conductivity limit their practical applications. Herein, the hierarchical flower-shaped (NH4)2V3O8/reduced graphene oxide (denoted as NVO/rGO) composite is designed to harvest high-efficiency Zn storage. Benefiting from the stable layered structure of NVO, the prominent pseudocapacitance, and excellent conductivity of rGO, the NVO/rGO composite exhibits a high specific capacity of 375.3 mAh g−1 at 0.2 A g−1, excellent cycling stability of 265.0 mAh g−1 after 3700 cycles at 5.0 A g−1 (capacity retention over 95.3 %), and outstanding rate performance of 263.9 mAh g−1 at 10.0 A g−1 by using traditional coin cells. To further verify the practicability of the NVO/rGO cathode, flexible electrode and xanthan gum electrolyte are adopted to assemble quasi-solid-state ZIBs, which exhibit a great specific capacity of 185.0 mAh g−1 at 0.5 A g−1 and good stability under different bending angles with an impressive capacity retention of 92.2 % after cycling. This study illustrates that hierarchical flower-shaped NVO/rGO has a promising potential as aqueous or quasi-solid-state ZIBs cathode and improves the application of vanadium-based materials. © 2021 Wiley-VCH GmbH.
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页码：4618 / 4624
页数：6
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