High-rate LiFe0.75Mn0.25PO4/C cathode material for lithium-ion battery was prepared by oriented growth of precursor crystal plane

• Published in: Journal of colloid and interface science Vol. 691; p. 137436
• Main Authors: Zhang, Yu, Li, Rong, Guo, Qi, Song, Fangxiang, Kai, Kang, Chen, Qianlin
• Format: Journal Article
• Language: English
• Published: Elsevier Inc 01.08.2025
• Subjects: cathodes; Crystal orientation; Cycle stability; electrochemistry; electron transfer; Ion immigration; lithium batteries; Lithium iron manganese phosphate; olivine; particle size; physiological transport; Precursors; reaction mechanisms; Lithium iron manganese phosphate; Cycle stability; Crystal orientation; Precursors; Ion immigration
• ISSN: 0021-9797; 1095-7103; 1095-7103
• DOI: 10.1016/j.jcis.2025.137436

[Display omitted] •Synthesizing long-flake Fe3(PO4)2·8H2O with high-exposure (020) planes via oriented crystal growth control.•LiFe0.75Mn0.25PO4/C cathode, using high-exposure (020) Fe3(PO4)2·8H2O precursor, achieves shorter ion diffusion path.•This method’s raw material use reduces pollution, offering novel insights for green industrial advancement. The emergence of the lithium-ion battery as a subject of intense research interest has propelled of high-energy–density LiFexMn1-xPO4(LFMP) becoming a prominent area of investigation. However, the material suffers from inherently low electronic conductivity due to its olivine structure, which imposes severe constraints on electron transport kinetics, thus adversely impacting both charge–discharge rates and overall electrochemical performance. We propose an innovative protocol for high-precision reaction mechanism modulation. By employing Fe3(PO4)2·8H2O with strategically enhanced (020) crystal plane exposure as a pivotal precursor, we synthesized LiFe0.75Mn0.25PO4/C cathode material featuring a shorter ion diffusion path. Comprehensive characterization coupled with electrochemical validation revealed that the resultant cathode material exhibits a smaller particle size and more uniform morphology, along with a superior rate performance and cycle stability. The discharge specific capacity is 144.1 mAh g−1 and the capacity retention reaches 96.1 % over 1000 cycles at a 1C rate. The findings demonstrate that the regulation of the growth trajectory of the precursor Fe3(PO4)2·8H2O crystal plane can markedly enhance the electronic conductivity and Li+ mobility of the cathode material, thereby optimising the electrochemical performance.