Citation: Jie WU, Zhihong LUO, Xiaoli CHEN, Fangfang XIONG, Li CHEN, Biao ZHANG, Bin SHI, Quansheng OUYANG, Jiaojing SHAO. Critical roles of AlPO₄ coating in enhancing cycling stability and rate capability of high voltage LiNi_0.5Mn_1.5O₄ cathode materials[J]. Chinese Journal of Inorganic Chemistry, ;2025, 41(5): 948-958. doi: 10.11862/CJIC.20240400 shu

Critical roles of AlPO₄ coating in enhancing cycling stability and rate capability of high voltage LiNi_0.5Mn_1.5O₄ cathode materials

1.
School of Materials and Metallurgy, Guizhou University, Guiyang 550025, China
2.
State Key Laboratory of Advanced Chemical Power Sources, Guizhou Meiling Power Supply Co., Ltd., Zunyi, Guizhou 563003, China
3.
School of Materials Science and Engineering, Shanxi Institute of Science and Technology, Jincheng, Shanxi 048011, China

Corresponding author: Jiaojing SHAO, shaojiao_jing@163.com
Received Date: 7 November 2024
Revised Date: 16 March 2025

Figures(8)

LiNi_0.5Mn_1.5O₄ (LNMO) was prepared by a high-temperature solid phase method, and then AlPO₄ (AP) was coated on the polyhedral LNMO surface by the wet chemical method. The experimental results showed that the LNMO-1%AP|Li cell prepared with a 1% mass ratio of AlPO₄ and LNMO had better electrochemical performance; after 450 cycles at 1C, its discharge specific capacity maintained 108.78 mAh·g^-1, while that of the LNMO|Li cell was only 86.04 mAh·g^-1. Especially at the high rates of 5C and 10C, the electrochemical properties of the former were far superior to the latter. This was attributed to the fact that the AP coating made the surface of LNMO in con- tact with the electrolyte more stable, effectively promoted the Li⁺ transport, and reduced the polarization voltage of the electrode.
- LiNi_0.5Mn_1.5O₄,
- high voltage lithium-ion batteries,
- high-temperature solid-phase method,
- aluminum phosphate,
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Critical roles of AlPO4 coating in enhancing cycling stability and rate capability of high voltage LiNi0.5Mn1.5O4 cathode materials

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Critical roles of AlPO₄ coating in enhancing cycling stability and rate capability of high voltage LiNi_0.5Mn_1.5O₄ cathode materials