锂离子蓄电池正极材料的快速评价

Rapid evaluation of cathode materials for lithium ion ba ttery

采用粉末微电极循环伏安法对自制的锂离子蓄电池正极材料LiNiO2和LiCoO2进行了快速研究。结果表明,粉末微电极循环伏安法不仅可以快速研究嵌脱反应机理和可逆性能,而且可以通过改变扫描速度来评价材料快速充放电能力,通过不同电位区间的循环伏安扫描来评价其抗过充过放能力。粉末微电极循环伏安法是快速评价锂离子蓄电池正极材料的有效手段。

LiNiO2 and LiCo O2, the cathode materials for lithium i on battery, was evaluated rapidly by mea ns of powder microelectrode cyclic volta mmetry method. The results show that the powder microelectrode cyclic voltammetr y method can be used not only to researc h the intercalation/de-intercalation mec hanism and reversibility of lithium ion, but also to appraise the high-rate capa bility of the compound by changing the s can rates, and evaluate the overcharge/o verdischarge capability by changing the scan regions. The powder microelectrode c yclic voltammetry method is an effective method to evaluate the cathode material s for lithium ion battery rapidly.