河北科技大学学报2026，Vol.47Issue(1)：97-107,11.DOI:10.7535/hbkd.2026yx01010
Mn3O4粒径和振实密度对LiMn2O4正极材料电化学性能的影响
Effects of Mn3O4 particle size and tap density on the electrochemical performance of LiMn2O4 cathode materials
摘要
Abstract
To address the problem of rapid capacity decay of LiMn2O4 during the cycling process,Mn3O4 with different particle sizes and tap densities was prepared by manganese salt method,and used as a precursor to synthesize LiMn2O4 cathode material.The effects of Mn3O4 particle size and tap density on the electrochemical performance were investigated using X-ray diffraction,cyclic voltammetry,electrochemical impedance spectroscopy,and galvanostatic charge-discharge tests.The results indicate that increasing the particle size of the Mn3O4 precursor leads to a slight decrease in the initial discharge specific capacity,but significantly improves both cycling stability and rate performance.Compared with the material derived from 6 μm Mn3O4,the cathode material prepared from 10 μm Mn3O4 exhibits a 6.2%reduction in initial discharge capacity,while achieving an 8.0%increase in capacity retention after 300 cycles and a 25.2%improvement at 5 C.Moreover,when the tap density of Mn3O4 exceeds 2.5 g/cm3,the rate performance of the material deteriorates sharply.The LiMn2O4 sample prepared with a precursor particle size of 10 μm and tap density of 2.5 g/cm3 demonstrates the best overall electrochemical performance,delivering discharge specific capacities of 122.48,111.9,and 78.42 mAh/g at 0.1,1,and 5 C,respectively,along with a capacity retention of 90.3%after 300 cycles.This study clarifies the influence of precursor physical properties on the electrochemical properties of LiMn2O4,providing basis for the synthesis of high-performance LiMn2O4 materials.关键词
电化学/Mn3O4/粒径/振实密度/LiMn2O4Key words
electrochemistry/Mn3O4/particle size/tap density/LiMn2O4分类
信息技术与安全科学引用本文复制引用
马钟琛,李文灿,张保平,柯晶,辛云涛..Mn3O4粒径和振实密度对LiMn2O4正极材料电化学性能的影响[J].河北科技大学学报,2026,47(1):97-107,11.基金项目
国家自然科学基金(52574408) （52574408）
湖南省重点研发计划项目(2025JK2076) （2025JK2076）
中冶集团"181计划"重大研发项目 （）
中冶长天科研开发基础研究基金(2025JCYJ11) （2025JCYJ11）
