Work

Effect of Different Charging Protocols on the High-Temperature Cycling Performance and Failure Analysis of LMFP Batteries

Year: 2026

Type: article

Abstract: Due to manganese dissolution, the cycling performance of lithium manganese iron phosphate (LMFP) batteries is significantly inferior to that of lithium iron phosphate (LFP) batteries.In this study, 5 Ah LMFP/C pouch cells were used to investigate the effects of different charging protocols on the high temperature cycling performance, followed by failure analysis.The results show that when the constant current-constant voltage with negative pulse (CC-CVNP) charging protocol was applied, the cell achieved 80% capacity retention after 897 cycles at 45°C.Under this protocol, the manganese deposition on the anode surface (534 ppm) was significantly lower than that under the stepwise charging (CC-CC) (827 ppm) and Constant current-constant voltage charging (CC-CV) (1102 ppm) charging protocols.Furthermore, the Li⁺ diffusion coefficient (D Li + ) of the cathode material was only slightly lower than that of the fresh cell.These findings indicate that the CC-CVNP charging protocol with negative pulses not only effectively prevents the deterioration of Li + diffusion kinetics but also mitigates material degradation, thereby extending the cell's lifespan.

Source: Journal of Electrochemical Science and Technology

DOI: 10.33961/jecst.2026.00213

Authors: Wang Wen, Zhang Bin

Institution: Kyushu University

Language: English

Topic: Advanced Battery Technologies Research

Subfield: Automotive Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: diamond

OpenAlex ID: W7154504634