CeO2-modified LiCoPO4cathodes with enhanced high-voltage and low-temperature performance enabled by graphitic carbon coating and lattice engineering for lithium-ion batteries


Cui S. Sun W. Xing Y. Liu W. Bakenov Z. Jin Y.
1 January 2026Elsevier B.V.

Journal of Power Sources
2026#661

Olivine-type LiCoPO4cathode materials are hindered by intrinsic limitations such as low electronic conductivity and sluggish Li + diffusion. To address these issues, this work proposes a dual-modified LCP/C-Ce composite synthesized through the incorporation of nano-CeO2during carbonization. Cerium species serve a dual function by improving both the carbon coating and the bulk crystal structure. Specifically, Ce promotes graphitization of the carbon layer, thereby enhancing electronic conductivity and cycling stability. Concurrently, Ce doping into the LCP lattice reduces the activation energy for Li+diffusion and mitigates Li-Co antisite defects, leading to improved low-temperature kinetics. The optimized LCP/C-2 %Ce cathode material (incorporating 2 % mass of CeO2into the cathode material precursor) exhibits an initial discharge specific capacity of 139.2 mAh g−1at 1 C rate, with capacity retention of 80.27 % after 500 cycles. Even at a high rate of 5 C, it retains 93.9 mAh g−1after 500 cycles (70.6 % retention). Notably, the material demonstrates remarkable low-temperature stability, providing 96.3 mAh g−1at −15 °C (0.05 C) with 94.88 % capacity retention after 100 cycles. This Ce-based dual modification strategy proves highly effective in creating high-safety, high-voltage cathodes with superior cycling and low-temperature performance for advanced batteries.

Carbon coating layer , CeO2 , Ion doping , Lithium cobalt phosphate , Low-temperature performance

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School of Materials Science and Engineering, Ocean University of China, Shandong, Qingdao, China
School of Engineering and Digital Sciences, Nazarbayev University, Astana, Kazakhstan

School of Materials Science and Engineering
School of Engineering and Digital Sciences

10 лет помогаем публиковать статьи Международный издатель

Книга Публикация научной статьи Волощук 2026 Book Publication of a scientific article 2026