Recycled cathode materials enabled superior performance for lithium-ion batteries
Recycled cathode materials enabled superior performance for lithium-ion batteries
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DOI：
10.1016/j.joule.2021.09.005
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发表时间：
2021-11-17
期刊：
影响因子：
39.8
通讯作者：
Wang, Yan
中科院分区：
文献类型：
--
作者：
Ma, Xiaotu;Chen, Mengyuan;Wang, Yan
废旧锂离子电池的回收利用对缓解原材料短缺和环境问题具有重要意义.然而，可回收材料被认为不如商业材料，阻止了该行业在新电池中使用可回收材料。在这里，我们证明了回收的LiNi 1/3 Mn 1/3Co 1/3 O 2具有上级速率和循环性能，通过各种工业级测试验证。具体来说，采用回收LiNi 1/3 Mn 1/3 Co 1/3 O2的1 Ah电池具有回收材料的最佳循环寿命结果，在80%和70%的容量保持率下可实现4，200次循环和11，600次循环，比最先进的商用LiNi 1/3 Mn 1/3 Co 1/3 O2高出33%和53%。同时，在5 ℃下，其倍率性能比商业粉末好88.6%。从实验和建模结果来看，再生材料的独特微观结构使其具有上级电化学性能。回收材料的性能优于市售同类产品，为废旧锂离子电池提供了一种绿色和可持续的解决方案。
Recycling spent lithium-ion batteries plays a significant role in alleviating the shortage of rawmaterials and environmental problems. However, recycled materials are deemed inferior to commercial materials, preventing the industry fromadopting recycledmaterials in new batteries. Here, we demonstrate that the recycled LiNi1/3Mn1/3Co1/3O2 has a superior rate and cycle performance, verified by various industry-level tests. Specifically, 1 Ah cells with the recycled LiNi1/3Mn1/3Co1/3O2 have the best cycle life result reported for recycled materials and enable 4,200 cycles and 11,600 cycles at 80% and 70% capacity retention, which is 33% and 53% better than the state-of-the-art, commercial LiNi1/3Mn1/3Co1/3O2. Meanwhile, its rate performance is 88.6% better than commercial powders at 5C. From experimental and modeling results, the unique microstructure of recycled materials enables superior electrochemical performance. The recycled material outperforms commercially available equivalent, providing a green and sustainable solution for spent lithium-ion batteries.