废旧锂离子电池正极材料钴酸锂的回收

Recycling of LiCoO_2 cathode materials from spent lithium ion batteries

The recycling of LiCoO2 cathode materials from spent li thium ion batteries was studied.A corresponding process was proposed.Propylene c arbonate was used as the solvent to recycle electrolyte.NMP was used as the solv ent to separate the active materials from current collectors at 70 ℃.Carbon pow der was removed by heat-treatment. Cobalt compounds were dissolved by HCl solu tion and recycled as Co（OH）2. The recycled Co（OH）2 was used as t he starting material to synthesize LiCoO2.The net recovery of cobalt was more than 99%.The analytical results of recycled LiCoO2 showed that the recycling p rocess was practical.

The recycling of LiCoO2 cathode materials from spent lithium ion batteries was studied. A corresponding process was proposed. Propylene carbonate was used as the solvent to recycle electrolyte. NMP was used as the solvent to separate the active materials from current collectors at 70 ℃. Carbon powder was removed by heat-treatment. Cobalt compounds were dissolved by HC1 solution and recycled as Co（OH）2. The recycled Co（OH）2 was used as the starting material to synthesize LiCoO2. The net recovery of cobalt was more than 99%. The analytical results of recycled LiCoO2 showed that the recycling process was practical.