电源技术2018，Vol.42Issue(2)：169-171,179,4.
以电解MnO2超细粉为锰源制备高倍率LiMn2O4材料
Synthesis of high-rate LiMn2O4 with electrolytic MnO2 ultra-fine particles
摘要
Abstract
Mn3O4 with big particle size and good crystallinity was first synthesized by high-temperature solid-state reaction method from electrolytic MnO2 (EMD) ultra-fine particles.Then the LiMn2O4 cathode material was successfully synthesized with the above Mn3O4 as Mn source.The crystal structure,surface morphology,particle size distribution,tap density and specific surface area of the synthesized materials were characterized by X-ray diffraction spectroscopy (XRD),scanning electron microscopy (SEM),laser particle size analyzer,tap density instrument and BET analyzer,respectively.The electrochemical performance of LiMn2O4 materials was measured by chargedischarge tests.The results show that the synthesized LiMn2O4 has good crystallinity with cubic spinel structure,narrow particle size distribution with D (50) of 8.88 μm and high tap density of 1.75 g/cm3.Moreover,the material delivers the initial discharge capacity of 121.5 mAh/g at 0.2 C (1 C=120 mA/g) in the voltage range of 3.0-4.2 V (vs.Li/Li+),the capacity retention after 100 cycles is 90.8％,and the capacity ratio of 5 C/0.2 C is 76.8％,which demonstrate that the LiMn2O4 material has good cycle performance and high-rate property.关键词
锂离子电池/正极材料/尖晶石型LiMn2O4/倍率性能/电解MnO2超细粉Key words
lithium-ion batteries/cathode material/spinel type LiMn2O4/rate performance/electrolytic MnO2 ultra-fine particles分类
信息技术与安全科学引用本文复制引用
李刚,陈旭,陈彦彬,刘大亮,杨文胜..以电解MnO2超细粉为锰源制备高倍率LiMn2O4材料[J].电源技术,2018,42(2):169-171,179,4.基金项目
国家自然科学基金联合基金项目(U1407118) （U1407118）
