期刊
CHEMICAL ENGINEERING JOURNAL
卷 443, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2022.136502
关键词
Znic ion batteries; Soft-packed battery; Cathode; Mg0.2V2O5 center dot nH(2)O; Pseudocapacitance
资金
- National Natural Science Foundation of China [21905058]
- Guangdong University of Technology Youth Hundred Talents Program [220413671]
This study presents a new cathode material for aqueous zinc ion batteries (ZIBs) based on Mg2+ pre-intercalated V2O5·nH2O nanobelts derived from conductive V4C3 MXenes. The material exhibits high reversible capacity, ultra-long cycling stability, and favorable rate performance, attributed to the stable structure, reversible phase transformation, and high pseudocapacitive behavior.
Aqueous zinc ion batteries (ZIBs) are of great concern for their low cost, high safety and eco-friendliness. Vanadium oxides are the underlying cathode materials for ZIBs because of their high theoretical capacity. However, the slow kinetics of multivalent charged Zn2+ in the host structure and unstable structure induce inferior cycling stability and rate performance. Herein, Mg2+ pre-intercalated V2O5 center dot nH(2)O nanobelts derived from conductive V4C3 MXenes are devised and prepared as cathodes for ZIBs, delivering a high reversible capacity of 346 mAh g(-1) at 0.1 A g(-1) and preeminent ultra-long cycling stability with capacity retention of 83.7% after 10,000 cycles at 5 A g(-1). Using this material as cathode, the soft-packed battery also represents favourable rate and cycling performance. The stable structure originated from pre-intercalated Mg2+ and interlayered water, splendid reversible phase transformation and high pseudocapacitive behavior boost the preeminent cycling stability and rate capacity.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据