Citation: Yuanyuan JIANG, Fangfang TU, Yuhong ZHANG, Shi CHEN, Jiayuan XIANG, Xinhui XIA. Preparation and electrochemical properties of high-stability cathode prelithiation additive[J]. Chinese Journal of Inorganic Chemistry, ;2025, 41(6): 1101-1111. doi: 10.11862/CJIC.20240441 shu

Preparation and electrochemical properties of high-stability cathode prelithiation additive

1.
Zhejiang Narada Power Source Co., Ltd., Hangzhou 311300, China
2.
School of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, China

Corresponding author: Fangfang TU, tuff@naradapower.com
Received Date: 11 December 2024
Revised Date: 15 April 2025

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In this work, based on the catalytic effect of several metal oxides on the decomposition of lithium oxalate (Li₂C₂O₄, LCO), a series of CuMn_xO_1+1.5x bimetallic oxides with different molar ratios (x) of Mn and Cu were synthesized via the controlled calcination of CuO-Mn₂O₃ mixture. The structural composition and surface morphology were characterized using the X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), N₂ adsorption-desorption isotherms, and scanning electron microscopy (SEM). The catalysts were applied in the electrochemical test of LCO at 0.05C within the voltage range of 2.5-4.5 V. Results showed that the charge specific capacity of LCO could be increased to 404.7 mAh·g^-1 and delithium potential can be reduced to 4.44 V with the initial Coulombic efficiency of 1.3% over CuMn_1.1O_2.7 catalyst, which could match with the lithium iron phosphate (LFP) materials as a cathode prelithiation additive. The rate-determining step of LCO decomposition and the mechanism of the catalyst were revealed by density functional theory (DFT) calculations. Subsequently, a certain amount of LCO/CuMn_1.1O_2.7 was added to the LFP slurry, and the corresponding electrochemical performance was tested by assembling half-cells. It was found that under the optimal lithium supplement content, the initial charge capacity of the LFP electrode was 205.9 mAh·g^-1, and the practical capacity utilization of LCO could reach 74.1%. Moreover, the cycle performance of LFP can also be improved by using an LCO prelithiation additive.
- lithium iron phosphate,
- cathode prelithiation additive,
- lithium oxalate,
- metal oxide
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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Preparation and electrochemical properties of high-stability cathode prelithiation additive

南开大学师唯/华北电力大学（保定）刘景维：二维配位聚合物中有序的亲锂冠醚位点用于无枝晶锂沉积

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通讯作者: 陈斌, bchen63@163.com