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07-07-2023 дата публикации

Recycling process and application of lithium battery positive electrode material

Номер: CN116404290A
Автор: LIANG ZHENG, SUN XU, LI JIE, NIU SHENG, TUO WANSHENG, ZHAO DANDAN, WANG JIYING, WU PING
Принадлежит:

The invention belongs to the field of lithium ion batteries, and particularly relates to a recovery process and application of a lithium battery positive electrode material. According to the method, the carbonate powder is added, and the lithium battery positive pole piece is calcined and recycled, so that substances such as conductive carbon black and PVDF in the positive pole material are almost completely removed, and the structure and the performance of the positive pole material are protected from being influenced. The recycling process is simple, economical, practical, environment-friendly and low in cost, and the obtained lithium battery positive electrode material is excellent in processability, physical and chemical properties and electrical properties.

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Номер записи: 1
21-07-2023 дата публикации

Method and system for repairing and recycling lithium battery positive electrode material by dry method

Номер: CN116470171A
Автор: LIANG ZHENG, SUN XU, NIU SHENG, TUO WANSHENG, ZHAO DANDAN, WANG JIYING, WU PING
Принадлежит:

The invention relates to the technical field of lithium batteries (the IPC classification number is H01M10/54), in particular to a method and system for repairing and recycling a lithium battery positive electrode material through a dry method, and the method comprises the following steps: uniformly mixing a powder removal material of a waste lithium battery pole piece with a metal oxide to obtain a mixture, then carrying out primary roasting and lithium supplementation, and carrying out secondary roasting on the mixture. Compared with the prior art, the method has the advantages that the problem that HF generated by PVDF thermal decomposition in the recovery and repair process of the lithium battery is difficult to remove is solved by adding the specific metal oxide for the first time, the problem that the battery material is corroded by HF is greatly reduced, the recovery and repair effects are good, and extremely high economic benefits are brought to enterprises.

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Номер записи: 2