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Ammonia Reduction System for the Diversity of Cathode Processing of Li-Ion Batteries
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2021-09-02 , DOI: 10.1021/acssuschemeng.1c02744
Jiefeng Xiao 1 , Bo Niu 1 , Zhenming Xu 1, 2
Affiliation  

This study breaks the traditional notion of spent cathode processing and develops a specific approach using the ammonia reduction system to take advantage of the residual value of spent Li-ion batteries (LIBs), optionally for the purpose of down-cycle or up-cycle processing. For cathode down-cycling as metal resources, >97% lithium with nearly 100% selectivity is recycled as lithium salts in one step, while other transition metals including nickel, cobalt, and manganese are recovered as metals or metal oxides. For cathode up-cycling as value-added materials, the cathode from LIBs is directly processed to synthesize the core–shell structure composites as Li-doped Co@g-C3N4 materials whose degradation rate is about 11 times higher than that of fresh g-C3N4. This LIB-specific technology can realize the diversity of LIB processing which can be called as “kill two birds with one stone”. From the down-cycling perspective, metal resources can be effectively recovered to meet the demand of explosive increasing LIB production. Besides, the up-cycling cathode as the enhanced photocatalyst provides technical storage and support for the future development of spent LIB processing diversity.

中文翻译:

用于锂离子电池阴极处理多样性的氨还原系统

这项研究打破了废阴极处理的传统概念,并开发了一种使用氨还原系统的特定方法,以利用废锂离子电池 (LIB) 的残值,可选择用于降循环或升循环处理. 对于作为金属资源的阴极向下循环,>97% 的锂以接近 100% 的选择性在一个步骤中作为锂盐回收,而其他过渡金属包括镍、钴和锰作为金属或金属氧化物回收。对于作为增值材料的正极升级循环,LIBs的正极直接加工合成核壳结构复合材料,作为Li掺杂的Co@gC 3 N 4材料,其降解率比新鲜gC高约11倍3 N4 . 这种LIB特有的技术可以实现LIB加工的多样性,堪称“一石二鸟”。从降级循环的角度来看,可以有效回收金属资源,满足锂离子电池产量爆发式增长的需求。此外,作为增强型光催化剂的上循环阴极为废LIB处理多样性的未来发展提供了技术存储和支持。
更新日期:2021-09-13
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