Layered hydrated vanadium oxide as highly reversible intercalation cathode for aqueous Zn-ion batteries

被引：105
作者：
Wang, Pinji [1 ]
Shi, Xiaodong [1 ]
Wu, Zhuoxi [1 ]
Guo, Shan [1 ]
Zhou, Jiang [1 ,2 ]
Liang, Shuquan [1 ,2 ]
机构：
[1] Cent South Univ, Sch Mat Sci & Engn, Changsha 410083, Hunan, Peoples R China
[2] Cent South Univ, Key Lab Elect Packaging & Adv Funct Mat Hunan Pro, Changsha, Hunan, Peoples R China
来源：
CARBON ENERGY | 2020年 / 2卷 / 02期
基金：
中国国家自然科学基金;
关键词：
cut-off voltage; hydrated vanadium oxide; layered structure; zinc storage mechanism; Zn-ion battery; HIGH-CAPACITY; PERSPECTIVE; ELECTRODE;
D O I：
10.1002/cey2.39
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Aqueous Zn-ion batteries (ZIBs) hold great potential in large-scale energy storage systems due to the merits of low-cost and high safety. However, the unstable structure of cathode materials and sluggish (de)intercalation kinetics of Zn2+ pose challenges for further development. Herein, highly reversible aqueous ZIBs are constructed with layered hydrated vanadium oxide as a cathode material. The electrochemical performances are further tested with the optimized electrolyte of 3M Zn(CF3SO3)(2) and a cut-off voltage of 0.4 to 1.3V, exhibiting a remarkable capacity of 290mAhg(-1) at 0.5Ag(-1), and long-term cycling stability at high current density. Furthermore, the Zn2+ storage mechanism of V3O7.H2O is recognized as a highly reversible (de)intercalation process with good structural stability, implying the potential application in the field of large-scale energy storage.
引用
收藏
页码：294 / 301
页数：8
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