期刊
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
卷 26, 期 7, 页码 669-672出版社
JOURNAL MATER SCI TECHNOL
DOI: 10.1016/S1005-0302(10)60104-1
关键词
Lithium-ion battery; Anode; Ca3Co4O9; K-doping
Ca3Co4O9 (CCO) and Ca2.95K0.05Co4O9 (CKCO) powders have been prepared by the polyacrylamide gel method. CKCO shows increased capacity and better cycling stability compared with CCO. After cycled for 50 cycles at 0.5 C, CKCO retains a capacity of 223 mAh.g(-1), almost twice than CCO. The electrochemical impedance spectroscopy (EIS) tests shows the CKCO sample has a lower initial charge transfer resistance (R-ct) and undergoes smaller R-ct change during cycling than the CCO sample, indicating improved electrochemical performance by K-doping.
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