Electrochemical and charge/discharge properties of the synthesized cobalt oxide as anode material in Li-ion batteries
Electrochemical and charge/discharge properties of the synthesized cobalt oxide as anode material in Li-ion batteries
复制标题
DOI：
10.1016/j.jpowsour.2006.04.054
复制
发表时间：
2006-09
影响因子：
9.2
通讯作者：
J. Do;Chien-Hsiang Weng
中科院分区：
文献类型：
--
作者：
J. Do;Chien-Hsiang Weng
采用循环伏安法和恒电流充放电法研究了氢氧化钴煅烧法制备的钴氧化物的电化学和充放电行为。含20%炭黑的钴氧化物的循环伏安曲线与Li/CoO电池的充放电行为有很好的相关性。在首次循环中出现的0.5V（相对于Li/Li+）的阴极峰对应于Li/CoO电池首次放电1.0-0.8V的平台电压，推测是CoO颗粒还原分解为纳米Co和Li_2O。在随后的循环中，由于CoO颗粒从微米尺寸减小到纳米尺寸，阴极峰和放电平台电压都向更高的值移动。
The electrochemical and charge/discharge behaviors of cobalt oxide prepared by the calcination of cobalt hydroxide were studied by the cyclic voltammetry (CV) and galvanostatical charge/discharge methods. The cyclic voltammograms of cobalt oxide containing 20% carbon black were correlated well with the results in the charge/discharge behaviors of Li/CoO batteries. A cathodic peak with potential of 0.5V (versus Li/Li+) in the first cycle of CV corresponded to the plateau with voltage of 1.0–0.8V in the first discharge cycle of Li/CoO battery was deduced to be the reduction and decomposition of CoO particle to be the nano-sized Co and Li2O. Both of the cathodic peak and the discharge plateau voltages were shifted to higher values in the following cycles due to the reduction of CoO particle from micro to nano-size.