期刊
ELECTROCHIMICA ACTA
卷 403, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2021.139687
关键词
Alloy; Potassiated anode; K-ion batteries; Prussian blue analogue; Counter electrode
资金
- Education Department of Liaoning Province's Item [JYT19041, JYT19047]
- Department of Science & Technology of Liaoning Province's Item [2020BS-173]
- Natural Science Foundation of Liaoning Province [2019ZD-0222]
- Guangdong Basic and Applied Basic Research Foundation [2019A151/5111077]
In this study, it was found that the performance of cathode materials for K-ion batteries is limited by the metal K counter electrode. By using a potassiated alloy/carbon composite counter electrode, the Prussian blue analogue cathode exhibited outstanding rate capability and cycling stability, as well as improved battery parameters. This work offers a new perspective for both fundamental and practical research of K-ion batteries.
Many efforts were made to modify cathode materials for K-ion batteries to improve their performance. However, the improvements are not so significant. Herein, we show that the performance of host materials are limited by metal K counter electrode, which leads to underestimation of materials. With a potassiated alloy/carbon composite counter electrode, the Prussian blue analogue cathode can show outstanding rate capability at 5000 mA g(-1) and operate 1000 cycles without capacity fading. Besides, when the anode utilization increased to 72.7%, the battery parameters, such as lifespan, energy and power density, were also promising. This work offers a new perspective for both fundamental and practical research of K-ion batteries. (C) 2021 Elsevier Ltd. All rights reserved.
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