Ammonia Reduction System for the Diversity of Cathode Processing of Li-Ion Batteries,ACS Sustainable Chemistry & Engineering

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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,

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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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