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An Effective Way of Improving the Performance of Ni‐Rich LiNi 0.82 Co 0.12 Mn 0.06 O 2 Cathode in Lithium‐Ion Battery via Borate Coating
Author(s) -
Lin Jianxiong,
Fang Liang
Publication year - 2021
Publication title -
energy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 44
eISSN - 2194-4296
pISSN - 2194-4288
DOI - 10.1002/ente.202000721
Subject(s) - electrolyte , lithium (medication) , cathode , boron , materials science , electrode , nickel , electrochemistry , inorganic chemistry , chemical engineering , lithium borate , slurry , chemistry , metallurgy , composite material , medicine , organic chemistry , borate glass , engineering , endocrinology
Nickel‐rich cathode materials are competitive materials for their low cost and high specific capacity without charging at high potentials. However, structure instability, especially the side reaction, still needs to be further solved. Herein, an effective way of improving the performance of nickel‐rich cathode materials via borate coated on the water‐washed sample is introduced. The boron elements can both easily form a membrane and diffuse into the whole particle to form lithium boron oxides. This Li + conductor network makes the lithium transfer more efficiently and acts as an artificial solid‐state electrolyte interface (SEI), which increases the discharge capacity. A lithium boron oxides barrier film is formed between electrode and electrolyte, which effectively suppresses the side reaction and improves the capacity retention. Moreover, the reduction of residual lithium compound and pH value, which leads to more stable electrode slurry, making it more attractive for practical applications.