Improving interfacial electrochemistry of LiNi0.5Mn1.5O4 cathode coated by Mn3O4

被引：5
作者：
Deng, Miao-miao [1 ,2 ,3 ]
Zhang, Da-wei [1 ]
Shao, Yu [2 ,3 ]
He, Xiao-dong [2 ,3 ]
Yasmin, Aqsa [2 ,3 ]
Chen, Chun-hua [2 ,3 ]
机构：
[1] Heifei Univ Technol, Sch Chem & Chem Engn, Hefei 230009, Peoples R China
[2] Univ Sci & Technol China, Chinese Acad Sci, Key Lab Mat Energy Convers, Dept Mat Sci & Engn, Hefei 230026, Peoples R China
[3] Univ Sci & Technol China, Collaborat Innovat Ctr Suzhou Nano Sci & Technol, Hefei 230026, Peoples R China
来源：
CHINESE JOURNAL OF CHEMICAL PHYSICS | 2020年 / 33卷 / 04期
基金：
中国博士后科学基金; 中国国家自然科学基金;
关键词：
Lithium-ion batteries; Cathode materials; Spinel lithium nickel manganese oxide; Surface modification; Cathode-electrolyte interphase; SPINEL LINI0.5MN1.5O4; ELECTRODE MATERIALS; HIGH-ENERGY; SURFACE MODIFICATION; LITHIUM; LIMN1.5NI0.5O4; PERFORMANCE; TEMPERATURE; IMPACT;
D O I：
10.1063/1674-0068/cjcp1906118
中图分类号：
O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];
学科分类号：
070203 ; 070304 ; 081704 ; 1406 ;
摘要：
In this work the surface of LiNi0.5Mn1.5O4(LMN) particles is modified by Mn(3)O(4)coating through a simple wet grinding method, the electronic conductivity is significantly improved from 1.53x10(-7)S/cm to 3.15x10(-5)S/cm after 2.6 wt% Mn(3)O(4)coating. The electrochemical test results indicate that Mn(3)O(4)coating dramatically enhances both rate performance and cycling capability (at 55 degrees C) of LNM. Among the samples, 2.6 wt% Mn3O4-coated LNM not only exhibits excellent rate capability (a large capacity of 108 mAh/g at 10 C rate) but also shows 78% capacity retention at 55 degrees C and 1 C rate after 100 cycles.
引用
收藏
页码：485 / 490
页数：6
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