电化学
阴极
电极
水溶液
电池(电)
材料科学
离子
降级(电信)
容量损失
相变
化学工程
储能
纳米技术
电气工程
化学
有机化学
热力学
物理化学
功率(物理)
工程类
物理
作者
Xinliang Li,Mian Li,Qi Yang,Hongfei Li,Hailong Xu,Zhifang Chai,Ke Chen,Zhuoxin Liu,Zijie Tang,Longtao Ma,Zhaodong Huang,Binbin Dong,Xiaowei Yin,Qing Huang,Chunyi Zhi
出处
期刊:ACS Nano
[American Chemical Society]
日期:2020-01-09
卷期号:14 (1): 541-551
被引量:198
标识
DOI:10.1021/acsnano.9b06866
摘要
Nonbattery behavior related phase transition of electrodes is usually not favorable for any batteries because it results in performance degradation at all times. Here, we demonstrate a zinc hybrid-ion battery (ZHIB) with an unusual capacity enhancement even within 18 000 cycles by employing V2CTX MXene as the cathode, enormously differing from all reported counterparts with capacity degradation initiated within hundreds of cycles. The dominated mechanisms are determined to be MXene delamination and an unexpected phase transition during cycling. Both the original cathode and secondary derivative contribute to capacity simultaneously, resulting in the unusual capacity enhancement. Consequently, the specific capacity of 508 mAh g–1 (highest for all reported aqueous zinc-ion batteries) and high energy density of 386.2 Wh kg–1 are realized. Also, the quasi-solid-state batteries fabricated can output stably at −20 °C and in bending, twisting, stabbing, and cutting conditions. Our work brings an effective approach, that is, utilizing “unstable” electrode materials, which should usually be avoided, to achieve continuously enhanced performance of a battery. The idea to use both original and secondary materials for energy storage may be developed to be a general method to achieve extraordinary cycling stability of batteries.
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