【摘要】 采用回收的含有少量Co3O4的LiCoO2为原料,加入Li2CO3调整Li与Co的物质的量比,高温合成正极材料LiCoO2,运用扫描电镜和X射线衍射仪对合成的LiCoO2进行微观形貌与晶相结构的研究。研究结果表明:合成时间对晶体结构和电化学性能有较大的影响,合成时间越长,LiCoO2的结构越完整;将LiCoO2样品组装成电池进行电化学检测,烧结时间为12 h的样品首次充、放电比容量分别为161.16和150.67 mA.h/g,经30次循环之后,放电比容量仍有141.19 mA.h/g,表现出良好的电化学性能。更多还原

【Abstract】 LiCoO₂ was synthesized from the recycled LiCoO₂ power with little Co₃O₄ at high temperature. The structure and morphology of the synthesized samples were observed with X-ray diffractometry and scanning electron microscope technique,respectively.The results show that calcination time has significant effect on the structure and the electro chemical performance of LiCoO₂. The layered structure and the electrochemical propertiy of LiCoO₂ are improved as the calcined time prolongs.The initial charge and discharge capacities of LiCoO₂ calcined for 12 h are 161.16 and 150.67 mA·h/g,respectively.The discharge capacity of LiCoO₂ cathode material after cycle for 30 times is still 141.19 mA·h/g.更多还原