unknown

Preparation and Electrochemical Performances of LiNi0.5Mn1.5O4 as Cathode Materials for Lithium Ion Battery

Abstract

锂离子电池作为一种清洁高效的电化学储能系统,由于其能量密度很大程度上受制于正极材料,因此进一步提高锂离子电池的能量密度,具有高电压平台的尖晶石型LiNi0.5Mn1.5O4材料成为现阶段正极材料研究的热点。 本文通过合成方法、合成条件调节及电解液优化和包覆改性等来提高LiNi0.5Mn1.5O4材料的倍率性能和循环性能。主要内容如下: 1.对溶胶凝胶法合成条件中的温度、锂含量、pH和煅烧前处理方式进行了优化,确定了煅烧结晶的最佳温度为800℃,pH为3.4,锂含量为n(Li)/n(Mn)=1.05:1.50。 2.研究了ET(EC:EMC:DMC=1:1:1)和PES(PC:EMC:SL...Lithium ion batteries as the most efficient and convenient energy storage its energy desity is restricted by the cathode materials. To improve the energy density spinel LiNi0.5Mn1.5O4 is becoming a promising high-voltage cathode material which can reversibly intercalate/deintercalate lithium ions at 4.7 V. In this thesis, we developed different methods to prepare spinel LiNi0.5Mn1.5O4. Meanwhile...学位:理学硕士院系专业:能源研究院_能源化学学号:3242010115210

    Similar works