1. Simultaneous Single Crystal Growth and Segregation of Ni-Rich Cathode Enabled by Nanoscale Phase Separation for Advanced Lithium-Ion Batteries
- Author
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Bi, Yujing, Xu, Yaobin, Yi, Ran, Liu, Dianying, Zuo, Peng, Hu, Jiangtao, Li, Qiuyan, Wu, Jing, Wang, Chongmin, Tan, Sha, Hu, Enyuan, Li, Jingnan, Toole, Rebecca O, Luo, Liu, Hao, Xiaoguang, Venkatachalam, Subramanian, Rijssenbeek, Job, and Xiao, Jie
- Subjects
Condensed Matter - Materials Science ,Physics - Chemical Physics - Abstract
Synthesis of high-performance single crystal LiNi0.8Mn0.1Co0.1O2 (NMC811) in the absence of molten salt is challenging with no success yet. An innovative drop-in approach is discovered to synthesize single crystal NMC811 by controlling the morphology of transition metal hydroxide TM(OH)2 precursors followed by a simple decomposition step to form transition metal oxide (TMO) intermediates. Ni redistribution in TMO, as a result of the concurrent formation of mixed spinel and rock salt phases, helps deagglomerate the later formed NMC811 clusters of single crystals. As-prepared single crystal NMC811 is validated in a 2Ah pouch cell demonstrating 1000 stable cycling. The fundamentally new reaction mechanism of single crystal growth and segregation without molten salt provides a new direction towards cost-efficient manufacturing of single crystal NMC811 cathode for advanced lithium-based batteries., Comment: 13 pages, 5 figures
- Published
- 2023