Electrolyte-assisted low-voltage decomposition of Li2C2O4 for efficient cathode pre-lithiation in lithium-ion batteries

Rang Xiao; Cong Kang; Yang Ren; Jiyuan Jian; Binghan Cui; Geping Yin; Yulin Ma; Pengjian Zuo; Guokang Han; Chunyu Du

doi:10.1039/D3CC04442D

Electrolyte-assisted low-voltage decomposition of Li₂C₂O₄ for efficient cathode pre-lithiation in lithium-ion batteries†

Rang Xiao,^a Cong Kang,^a Yang Ren,^a Jiyuan Jian,^a Binghan Cui,^a Geping Yin,^a Yulin Ma,

^a Pengjian Zuo,

^a Guokang Han

*^a and Chunyu Du

*^a

Author affiliations

* Corresponding authors

^a a MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, China
E-mail: cydu@hit.edu.cn, gkhan@hit.edu.cn

Abstract

Lithium oxalate (Li₂C₂O₄) 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 NaNO₂ additive and the LiNi_0.83Co_0.07Mn_0.1O₂ (NCM) cathode material, the decomposition efficiency of micro-Li₂C₂O₄ reaches 100% at a low charge cutoff voltage of 4.3 V. Our work boosts the widespread practical application of Li₂C₂O₄ by a simple and promising electrolyte-assisted cathode pre-lithiation strategy.

Chemical Communications

Electrolyte-assisted low-voltage decomposition of Li₂C₂O₄ for efficient cathode pre-lithiation in lithium-ion batteries†

Abstract

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Electrolyte-assisted low-voltage decomposition of Li₂C₂O₄ for efficient cathode pre-lithiation in lithium-ion batteries

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