Structure and Performance of Dual-doped LiMn2O4 Cathode Materials Prepared via Microwave Synthesis Method

被引：58

作者：

Zhang, Huang ^{[1
]}

Xu, Yunlong ^{[1
]}

Liu, Dong ^{[2
]}

Zhang, Xiusheng ^{[1
]}

Zhao, Chongjun ^{[1
]}

机构：

[1] E China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai Key Lab Adv Polymer Mat, Key Lab Ultrafine Mat,Minist Educ, Shanghai 200237, Peoples R China

[2] Univ Texas Arlington, Dept Mat Sci & Engn, Arlington, TX 76019 USA

来源：

ELECTROCHIMICA ACTA | 2014年 / 125卷

关键词：

LiMn2O4; Dual-doping; Microwave sintering; Mn dissolution; Cycle stability; LITHIUM-ION BATTERIES; ELECTROCHEMICAL PROPERTIES; SPINEL; ELECTRODE; NANOPARTICLES; CR;

D O I：

10.1016/j.electacta.2014.01.102

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

A series of LiNi(0.05-x)xMg(x)Mn(1.95)O(4) (0.01 <= x <= 0.04) compounds were synthesized using microwave irradiation as sintering technique. The structures and electrochemical performances of the as-prepared powders were characterized by XRD, SEM, EDS, TEM, electrochemical galvanostatic cycling tests, EIS and XRF. The XRD and Rietveld refinement results indicate that all samples exhibit a single spine structure and dual-doping causes the shrinkage of lattice space. The discharge capacities and cycling performances of LiNi0.03Mg0.02Mn1.95O4 are the best with a low capacity fading over the investigated 30 cycles at elevated temperature (55 degrees C). These results demonstrate that the microwave sintering method and metallic ions co-doping are effective ways to suppress the Mn dissolution from active electrodes at high temperature and high rate for lithium-ion batteries. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：225 / 231

页数：7

共 41 条

[1] X-ray diffraction, EPR, and 6Li and 27Al MAS NMR study of LiAlO2-LiCoO2 solid solutions [J].