Improved rate performance of LiNi0.5Mn1.5O4 as cathode of lithium-ion battery by Li0.33La0.56TiO3 coating

被引：28
|
作者：
Zhu, Yan-Rong [1 ,2 ,4 ]
Yi, Ting-Feng [1 ,2 ,4 ]
Li, Xiao-Ya [2 ]
Xie, Ying [3 ]
Luo, Shaohua [1 ,2 ,4 ]
机构：
[1] Northeastern Univ, Sch Mat Sci & Engn, Shenyang 110819, Liaoning, Peoples R China
[2] Northeastern Univ Qinhuangdao, Sch Resources & Mat, Qinhuangdao 066004, Peoples R China
[3] Heilongjiang Univ, Sch Chem & Mat Sci, Minist Educ, Key Lab Funct Inorgan Mat Chem, Harbin 150080, Heilongjiang, Peoples R China
[4] Key Lab Dielect & Electrolyte Funct Mat Hebei Pro, Qinhuangdao, Peoples R China
来源：
MATERIALS LETTERS | 2019年 / 239卷
基金：
中国国家自然科学基金;
关键词：
Oxidation; LiNi0.5Mn1.5O4; Li0.33La0.56TiO3; Energy storage and conversion; SURFACE; LAYER;
D O I：
10.1016/j.matlet.2018.12.070
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Pristine LiNi0.5Mn1.5O4 (LNMO) and LNMO@LLTO (Li0.33La0.56TiO3) composites were synthesized by a sol-gel process. The lattice constant of LNMO increases with the increasing coated content of LLTO. All samples show irregular morphologies, and the particle size distributes uniformly between 200 and 500 nm. The inherent characteristic of Li0.33La0.56TiO3 with a large ionic conductivity decreases the interfacial charge transfer impedances, leading to an enhanced migration rate of Li-ions in the composite. As a cathode of LIBs, LNMO@LLTO (3 wt%) exhibits a large reversible capacity and a remarkable rate capability. Therefore, Li0.33La0.56TiO3 modification can be considered as an effective strategy to improve the rate capability of LNMO. (C) 2018 Elsevier B.V. All rights reserved.
引用
收藏
页码：56 / 58
页数：3
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