锂离子电池正极材料LiCoO2的制备新方法

利用电解金属钴制得Co(OH)_2-2xR_x(其中R为有机酸和无机酸根离子)中间产物,然后根据钴含量与LiOH·H₂O)固相反应制得了LiCoO₂.通过X光衍射,扫描电镜以及激光粒度测试表明,所得的锂离子正极材料LiCoO₂结构纯正,粒度分布集中,比表面积较大:对其进行充放电实验表明,放电容量比较高,首次放电容量达到146mAh/g,循环10次后容量仍保持在142mAh/g.该法可大大降低制备LiCoO₂的生产成本,具有十分广阔的应用前景.

A New Technique for Preparation of the Cathode Material of Lithium-ion Battery

The cathode material LiCoO₂ of lithium-ion batteries can be obtained from the reaction of LiOH·H₂O and Co(OH)_2-2xR_x(R is the inorganic or organic acid radicals), which is the midst product of the electrolysis of the metal cobalt in a given electrolyte. The achieved cathode material LiCoO₂ for lithium-ion batteries has a single phase and its granularity distribution relatively concentrates through the experiments of XRD. SEM and Laser Granularity Testing, The discharge capacity is relatively high which reaches 146mAh/g at the first time of discharging and still maintains 142mAh/g after 10 cycles of charge/discharge experiments. The cost for the preparation of the cathode material LiCoO₂ can greatly be decreased through this technique, which has a well-promising application future.