阴极
插层(化学)
材料科学
水溶液
溶解
电池(电)
电解质
离子
无机化学
电极
电化学
结晶学
物理化学
化学
热力学
功率(物理)
物理
有机化学
作者
Hao Yu,Shumin Zhang,Peng Tao,Tong Shen,Zijie Huang,Jingkai Yan,Yu Chen
出处
期刊:ChemNanoMat
[Wiley]
日期:2020-04-01
卷期号:6 (5): 797-805
被引量:50
标识
DOI:10.1002/cnma.202000105
摘要
Abstract Aqueous zinc‐ion batteries (ZIBs) have attracted widespread attention due to their advantages in safety and environmental benignity. However, achieving a cathode material with stable electrochemical performance for such a system remains an ongoing challenge. Herein, a K 0.5 V 2 O 5 cathode has been designed and synthesized by intercalating of K + into V 2 O 5 , thus constructing a stable crystal structure by forming chemical bonds between V 2 O 5 layers. The successful intercalation of K + has been confirmed by a series of experimental tests and Vienna Ab‐initio Simulation Package simulation. These layer‐interlinking chemical bonds act as “pillars” to strongly hold the V 2 O 5 layers together and protect them from dissolution. Furthermore, the K 0.5 V 2 O 5 electrode also exhibits excellent durability (about 150 mA h g −1 at 5 A g −1 after 3000 cycles). More impressively, even after standing for three days in the solution of 3 M ZnSO 4 electrolyte, the K 0.5 V 2 O 5 electrode still maintains a high capacity of 92.2 mA h g −1 after 150 cycles, demonstrating its outstanding stability and tolerance in such aqueous electrolyte.
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