Electrolyte-assisted low-voltage decomposition of LiCO for efficient cathode pre-lithiation in lithium-ion batteries

Lithium oxalate (Li 2 C 2 O 4 ) is an attractive cathode pre-lithiation additive for lithium-ion batteries (LIBs), but its application is hindered by its high decomposition potential (>4.7 V). Due to the liquid-solid synergistic effect of the NaNO 2 additive and the LiNi 0.83 Co 0.07 Mn 0.1 O 2 (...

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Published in:Chemical communications (Cambridge, England) England), 2023-11, Vol.59 (94), p.13982-13985
Main Authors: Xiao, Rang, Kang, Cong, Ren, Yang, Jian, Jiyuan, Cui, Binghan, Yin, Geping, Ma, Yulin, Zuo, Pengjian, Han, Guokang, Du, Chunyu
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Summary:Lithium oxalate (Li 2 C 2 O 4 ) is an attractive cathode pre-lithiation additive for lithium-ion batteries (LIBs), but its application is hindered by its high decomposition potential (>4.7 V). Due to the liquid-solid synergistic effect of the NaNO 2 additive and the LiNi 0.83 Co 0.07 Mn 0.1 O 2 (NCM) cathode material, the decomposition efficiency of micro-Li 2 C 2 O 4 reaches 100% at a low charge cutoff voltage of 4.3 V. Our work boosts the widespread practical application of Li 2 C 2 O 4 by a simple and promising electrolyte-assisted cathode pre-lithiation strategy. A NaNO 2 -catalyzed strategy is proposed for cathode pre-lithiation with Li 2 C 2 O 4 .
ISSN:1359-7345
1364-548X
DOI:10.1039/d3cc04442d