Advances in multi-element doping of LiFePO4 cathode material for capacity enhancement in Li-ion batteries


Akhmetova K. Sultanov F. Mentbayeva A. Umirov N. Bakenov Z. Tatykayev B.
30 December 2024Elsevier B.V.

Journal of Power Sources
2024#624

Olivine LiFePO4 stands as a competitive candidate for Li-ion battery cathode material owing to its stability, safety, and long lifespan. The inherent disadvantages of this cathode, mainly caused by its structural characteristics, are low intrinsic electronic conductivity and slow Li-ions diffusion rate, which limit the performance of the battery system. These problems are solved to some extent by carbon coating and morphology optimization. Another strategy employed to improve the performance of the battery system is doping with foreign ions. This modification directly affects the structure of LiFePO4 cathode and, consequently, offers a potential solution to its inherent issues. Numerous studies on doping LiFePO4 have been performed to date. Some of these studies concentrate on doping with multiple elements simultaneously. The goal of this review is to highlight recent research on multi-element doping of LiFePO4 cathode as a method of improving its electrochemical performance. Doping with two or more elements either on one site (Li/Fe/PO4) or two sites (Li&Fe/Fe&PO4) can widen Li-ion diffusion pathways, thus facilitating the Li-ion migration. This process can also lower the band gap, enhance electronic conductivity, and reduce the charge transfer resistance. These effects result in increased discharge capacities and improved cycling performance of the battery systems.

Cathode material , LiFePO4 , Lithium-ion batteries , Multi-element doping

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National Laboratory Astana, Nazarbayev University, 53 Kabanbay Batyr Ave., Astana, 010000, Kazakhstan
Department of Chemical and Materials Engineering, School of Engineering and Digital Sciences, Nazarbayev University, Kabanbay Batyr Ave. 53, Astana, 010000, Kazakhstan

National Laboratory Astana
Department of Chemical and Materials Engineering

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