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Start Over Author "Huang, Ying" Publisher elsevier b.v.
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207. Low-temperature stepwise lithiation method toward layered oxide cathodes with low Li+/Ni2+ antisite defects.

Author

Li, Pei-yao, Huang, Ying-de, Luo, Yu-hong, Wei, Han-xin, Tang, Lin-bo, Chen, He-zhang, Zhang, Xia-hui, and Zheng, Jun-chao

Subjects
*ANTISITE defects, *LITHIATION, *HEAT treatment, *MANUFACTURING processes, *LITHIUM-ion batteries, *ELECTROCHEMICAL electrodes, *CATHODES
Abstract

Although high-temperature solid-phase methods have become the dominant route for manufacturing layered oxide cathode materials in industry, severe Li+/Ni2+ cation mixing problems caused by high-temperature processes still prevent the realization of high-performance lithium-ion batteries. Herein, a wet chemical lithiation method by stepwise lithium intercalation to reduce and shorten the sintering temperature and time of the post-treatment process is proposed. Li 0.6 H x Ni 0.52 Co 0.19 Mn 0.29 O 2 stepwise products with lithiation efficiencies exceeding 60% were obtained at reaction temperatures below 200 °C. The as-prepared LiNi 0.52 Co 0.19 Mn 0.29 O 2 (HT-52-S) exhibits low Li+/Ni2+ cation mixing and good comprehensive electrochemical performance after subsequent heat treatment to complete all lithiation. Compared with LiNi 0.52 Co 0.19 Mn 0.29 O 2 (SS-52) prepared by the conventional high-temperature solid-phase method, the Li+/Ni2+ cation mixing of HT-52-S was relatively reduced by 57.9%, and the capacity retention after 100 cycles at 1 C was relatively improved by 22.1%. We believe that this work can serve as a useful reference to develop manufacturing processes for high-performance layered oxide cathode materials. [ABSTRACT FROM AUTHOR]

Published
2024
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