期刊
ACS NANO
卷 13, 期 9, 页码 10631-10642出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.9b04893
关键词
graphene; crystal carbon shell; ultrahigh performance; potassium ion batteries; aluminum batteries
类别
资金
- National Natural Science Foundation of China [51672078, 21473052]
- Hunan University State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body Independent Research Project [71675004]
- Hunan Youth Talents [2016RS3025]
Graphene is of great significance in energy storage devices. However, a graphene-based electrode is difficult to use in direct applications due to the large surface area and flexibility, which leads to the excessive consumption of electrolyte, low Coulombic efficiency, and electrode shedding behaviors. Herein, a special crystal carbon@graphene microsphere (CCGM) composite was successfully synthesized. The scalable carbonaceous microsphere composite displays a small specific surface area and a superior structure stability. As a potassium ion battery electrode in a half-cell, CCGM delivers an initial capacity of 297.89 mAh g(-1) with a high Coulombic efficiency of about 99%. It achieves an excellent cyclic stability with no capacity loss after 1250 cycles at the low current density of 100 mA g(-1) with a long performing period of more than one year. As the cathode for an aluminum battery, a reversible specific capacity of 99.1 mAh g(-1) at 1000 mA g(-1) is obtained. CCGM delivers a long cycle performance of about 10 000 cycles at 4000 mA g(-1) with a capacity retention of nearly 100%. Our design provides a fresh thought for the improvement of graphene-based materials, and it will greatly facilitate the application of graphene in the field of energy storage.
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