Innovative Application of Acid Leaching to Regenerate Li(Ni1/3Co1/3Mn1/3)O2 Cathodes from Spent Lithium-Ion Batteries
Innovative Application of Acid Leaching to Regenerate Li(Ni1/3Co1/3Mn1/3)O2 Cathodes from Spent Lithium-Ion Batteries
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DOI：
10.1021/acssuschemeng.7b04373
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发表时间：
2018-03
影响因子：
8.4
通讯作者：
Xiaoxiao Zhang;Yifan Bian;Siwenyu Xu;Ersha Fan;Qingrui Xue;Yi-biao Guan;Feng Wu;Li Li-Li;Renjie Chen
中科院分区：
文献类型：
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作者：
Xiaoxiao Zhang;Yifan Bian;Siwenyu Xu;Ersha Fan;Qingrui Xue;Yi-biao Guan;Feng Wu;Li Li-Li;Renjie Chen
储能系统的快速发展导致了对锂离子电池的需求激增，产生了大量含有高价值金属的废旧锂离子电池。在这里，我们提出了一种从废LiBS中再生Li(Ni1/3Co1/3Mn1/3)O2(NCM)阴极的新应用。锂溶解到溶液中，过渡金属转化为草酸盐沉淀物，沉积在废弃的NCM阴极表面，一步就能分离锂和过渡金属。与一定量的Li2CO3混合后，草酸盐沉淀物与未反应的NCM一起直接焙烧成新的NCM阴极。浸出10min后的负极材料具有最好的电化学性能，0.2C下的首次放电比容量为168mA h g-1,150次循环后的首次放电比容量为153.7 mA h g-1，容量保持率为91.5%。其优异的电化学性能归因于焙烧后形成的亚微米级颗粒和空洞，并具有良好的电化学性质。
Rapid development of energy storage system causes a burst demand of lithium-ion batteries (LIBs), and large number of spent LIBs with high valuable metals are produced. Here we propose a novel application of oxalic acid leaching to regenerate Li(Ni1/3Co1/3Mn1/3)O2 (NCM) cathodes from spent LIBs. With lithium dissolving into the solution, the transition metals transform into oxalate precipitates and deposit on the surface of spent NCM cathodes, separating lithium and transition metals in one simple step. After mixing with certain amount of Li2CO3, the oxalate precipitates together with unreacted NCM are directly calcined into new NCM cathodes. The regenerated NCM after 10 min leaching exhibits the best electrochemical performances, delivering the highest initial specific discharge capacity of 168 mA h g–1 at 0.2C and 153.7 mA h g–1 after 150 cycles with a high capacity retention of 91.5%. The excellent electrochemical performances are attributed to the submicrometer particles and voids after calcination, a...