LiCl/PVA Gel Electrolyte Stabilizes Vanadium Oxide Nanowire Electrodes for Pseudocapacitors
LiCl/PVA Gel Electrolyte Stabilizes Vanadium Oxide Nanowire Electrodes for Pseudocapacitors
复制标题
LiCl/PVA 凝胶电解质稳定赝电容器用氧化钒纳米线电极
DOI：
10.1021/nn304178b
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发表时间：
2012-11-01
期刊：
影响因子：
17.1
通讯作者：
Li, Yat
中科院分区：
文献类型：
--
作者：
Wang, Gongming;Lu, Xihong;Li, Yat
Here we report a new strategy to improve the electrochemical stability of vanadium oxide electrodes for pseudo-capacitors. Vanadium oxides are known to suffer from severe capacitance loss during charging/discharging cycling, due to chemical dissolution and ion intercalation/deintercalation-induced material pulverization. We demonstrate that these two issues can be addressed by using a neutral pH LiCl/PVA gel electrolyte. The function of the gel electrolyte is twofold: (i) it reduces the chemical dissolution of amphoteric vanadium oxides by minimizing water content and providing a neutral pH medium and (ii) it serves as a matrix to maintain the vanadium oxide nanowire network structure. Vanadium oxide nanowire pseudocapacitors with gel electrolyte exhibit excellent capacitance retention rates of more than 85% after cycling for sop cycles, without. sacrificing the electrochemical performance of vanadium oxides.
