High voltage LiMnxFe1-xPO4@NC cathode material for lithium-ion rechargeable batteries


Baikalov N. Agassultanov R. Sagyngerey Z. Sariyev S. Tokenov A. Bakenov Z. Konarov A.
15 January 2026Elsevier B.V.

Journal of Electroanalytical Chemistry
2026#1001

LiFePO4 (LFP) is a prospective material for use in electric vehicles (EVs), but it has low energy density. One of the ways of solving this problem is adding Mn ions. Mn ions induce higher voltage for the battery material. This work examined the properties of LiMnxFe1-xPO4 (LMFP) cathode material synthesized via solvothermal method and further coated with amorphous carbon and N-doped amorphous carbon. Three samples of x = 0.8, 0.6, and 0.5 further noted as LMFP08, LMFP06 and LMFP05 were synthesized to find the best performance by balancing the ratios of components for synthesis. N-doped carbon coating was synthesized using a solution of sucrose-glycine to enhance electrochemical conductivity and ion transport kinetics. Morphological and physical characterization of the material showed sub-micron rods with a conformal amorphous carbon shell. Galvanostatic charge and discharge cycling were performed showing LMFP08@C 140 mAh g−1, LMFP08@NC 157 mAh g−1, LMFP06@NC 130 mAh g−1, LMFP05@NC 148 mAh g−1of initial discharge capacity with LMFP06@NC retaining ∼120 mAh g−1after 200 cycles at 0.1C and samples with N doping showed remarkably better stability than the sample with bare amorphous carbon coating. This works results demonstrate that glycine and sucrose derived N-doped amorphous carbon coating improves interfacial kinetics and stability in comparison with amorphous carbon coating, while reaching close to theoretical capacities

Carbon coating , Lithium manganese iron phosphate , Nitrogen-doped amorphous carbon

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National Laboratory Astana, Nazarbayev University, Astana, Kazakhstan
Department of Chemical and Materials Engineering, School of Engineering and Digital Sciences, Nazarbayev University, Astana, 010000, Kazakhstan

National Laboratory Astana
Department of Chemical and Materials Engineering

10 лет помогаем публиковать статьи Международный издатель

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