Influence of LiMn2O4 modification with CeO2 on electrode performance

被引：40

作者：

Michalska, Monika ^{[1
]}

Hamankiewicz, Bartosz ^{[2
]}

Ziolkowska, Dominika ^{[3
]}

Krajewski, Michal ^{[4
]}

Lipinska, Ludwika ^{[1
]}

Andrzejczuk, Mariusz ^{[5
]}

Czerwinski, Andrzej ^{[2
,4
]}

机构：

[1] Inst Elect Mat Technol, PL-01919 Warsaw, Poland

[2] Ind Chem Res Inst, PL-01793 Warsaw, Poland

[3] Univ Warsaw, Fac Phys, PL-00681 Warsaw, Poland

[4] Univ Warsaw, Fac Chem, PL-02093 Warsaw, Poland

[5] Warsaw Univ Technol, Fac Mat Engn, PL-02507 Warsaw, Poland

来源：

ELECTROCHIMICA ACTA | 2014年 / 136卷

关键词：

lithium ion battery; spinel LiMn2O4; CeO2; cerium dioxide; low temperature method; TEMPERATURE CYCLING STABILITY; CATHODE MATERIALS; ELECTROCHEMICAL CHARACTERIZATIONS; MANGANESE SPINEL; LATTICE-DYNAMICS; LITHIUM; SPECTROSCOPY; SCATTERING; BATTERIES; OXIDES;

D O I：

10.1016/j.electacta.2014.05.108

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

In this article we present a low temperature method applied to modify the surface of lithium manganese oxide grains' by using cerium dioxide. In order to determine the structure, size of particles and morphology of the pristine and surface modified LiMn2O4 powders we used several complementary methods: X-ray powder diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM) and Raman spectroscopy. The galvanostatic charge/discharge tests of the pristine and CeO2 modified LiMn2O4 cathode materials were conducted in the potential range: 3.5 to 4.5V vs. Li/Li+ at room temperature. High current rates performance has been evaluated by determination of specific discharge capacity at current rates varied from 1 C to 30 C. Our work demonstrates that surface modification of LiMn2O4 grains' by using 1%wt. of cerium dioxide admixture improves cycling stability and capacity retention. Pristine LMO reveals 10% capacity loss after 100 cycles when discharged at 1 C, while the sample modified with CeO2 grains reveals only ca. 2% capacity loss. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：286 / 291

页数：6

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