Single crystal cathodes enabling high-performance all-solid-state lithium-ion batteries

Wang, Changhong; Yu, Ruizhi; Hwang, Sooyeon; Liang, Jianwen; Li, Xiaona; Zhao, Changtai; Sun, Yipeng; Wang, Jiwei; Holmes, Nathaniel; Li, Ruying; Huang, Huan; Zhao, Shangqian; Zhang, Li; Lu, Shigang; Su, Dong; Sun, Xueliang

doi:10.1016/j.ensm.2020.05.007

DOE OSTI · 1644006

Single crystal cathodes enabling high-performance all-solid-state lithium-ion batteries

Wang, Changhong·Yu, Ruizhi·Hwang, Sooyeon·Liang, Jianwen·Li, Xiaona·Zhao, Changtai·Sun, Yipeng·Wang, Jiwei·Holmes, Nathaniel·Li, Ruying·Huang, Huan·Zhao, Shangqian·Zhang, Li·Lu, Shigang·Su, Dong·Sun, Xueliang

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Abstract

All-solid-state lithium-ion batteries (ASSLIBs) are receiving significant attention owing to their improved safety and energy density over liquid counterparts. However, single-crystal cathodes have never been investigated in ASSLIBs. In this work, single-crystal Li(Ni 0.5 Mn 0.3 Co 0.2 )O 2 (SC-NMC532) is used as the cathode material for ASSLIBs, which exhibits 6~14 times higher Li + diffusion coefficient than polycrystalline Li(Ni 0.5 Mn 0.3 Co 0.2 )O 2 (PC-NMC532). As a result, SC-NMC532 exhibits an initial specific capacity of 156.4 mAh.g -1 while PC-NMC532 shows an initial capacity of only 127.5 mAh.g -1 . After 150 cycles, SC-NMC532 retains the capacity of 94.5 mAh.g -1 . More impressively, under a high current density of 1.3 mA.cm -2 , SC-NMC532 exhibits a capacity of 82 mAh.g -1 , much higher than that of PC-NMC532 (2.1 mAh.g -1 ). This work demonstrates that single-crystal NMC cathodes could enable both high power density and high energy density of ASSLIBs.

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Wang, Changhong, Yu, Ruizhi, Hwang, Sooyeon, Liang, Jianwen, Li, Xiaona, Zhao, Changtai, Sun, Yipeng, Wang, Jiwei, Holmes, Nathaniel, Li, Ruying, Huang, Huan, Zhao, Shangqian, Zhang, Li, Lu, Shigang, Su, Dong, Sun, Xueliang. 2020-05-15. Single crystal cathodes enabling high-performance all-solid-state lithium-ion batteries. https://doi.org/10.1016/j.ensm.2020.05.007

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