In this work the surface of LiNi0.5Mn1.5O4(LMN)particles is modified by Mn3O4 coating through a simple wet grinding method,the electronic conductivity is significantly improved from 1.53×10^-7 S/cm to 3.15×1...In this work the surface of LiNi0.5Mn1.5O4(LMN)particles is modified by Mn3O4 coating through a simple wet grinding method,the electronic conductivity is significantly improved from 1.53×10^-7 S/cm to 3.15×10^-5 S/cm after 2.6 wt%Mn3O4 coating.The electrochemical test results indicate that Mn3O4 coating dramatically enhances both rate performance and cycling capability(at 55℃)of LNM.Among the samples,2.6 wt%Mn3O4-coated LNM not only exhibits excellent rate capability(a large capacity of 108 m Ah/g at 10 C rate)but also shows 78%capacity retention at 55 ℃ and 1 C rate after 100 cycles.展开更多
基金the National Key R&D Program of China(No.2018YFB0905400)the Fundamental Research Funds for the Central Universities(No.JZ2019HGBZ0140)+2 种基金the National Natural Science Foundation of China(No.U1630106No.51577175)China Postdoctoral Science Foundation(No.172731)。
文摘In this work the surface of LiNi0.5Mn1.5O4(LMN)particles is modified by Mn3O4 coating through a simple wet grinding method,the electronic conductivity is significantly improved from 1.53×10^-7 S/cm to 3.15×10^-5 S/cm after 2.6 wt%Mn3O4 coating.The electrochemical test results indicate that Mn3O4 coating dramatically enhances both rate performance and cycling capability(at 55℃)of LNM.Among the samples,2.6 wt%Mn3O4-coated LNM not only exhibits excellent rate capability(a large capacity of 108 m Ah/g at 10 C rate)but also shows 78%capacity retention at 55 ℃ and 1 C rate after 100 cycles.
