Microemulsion-Assisted Synthesis of Nanosized Li-Mn-O Spinel Cathodes for High-Rate Lithium-Ion Batteries

被引：3

作者：

Rui, Xianhong ^{[1
,2
,3
]}

Sun, Wenping ^{[2
]}

Yan, Qingyu ^{[2
,3
]}

Lim, Tuti Mariana ^{[4
]}

Skyllas-Kazacos, Maria ^{[5
]}

机构：

[1] Anhui Univ Technol, Sch Energy & Environm, Maanshan 243002, Anhui, Peoples R China

[2] Nanyang Technol Univ, Sch Mat Sci & Engn, Singapore 639798, Singapore

[3] Nanyang Technol Univ, Energy Res Inst, Singapore 637459, Singapore

[4] Nanyang Technol Univ, Sch Civil & Environm Engn, Singapore 639798, Singapore

[5] Univ New S Wales, Sch Chem Engn, Sydney, NSW 2052, Australia

来源：

CHEMPLUSCHEM | 2014年 / 79卷 / 12期

关键词：

cathodes; high-rate capability; lithium manganese oxide; microemulsions; nanoparticles; POSITIVE ELECTRODE; RATE CAPABILITY; LIMN2O4; SPHERES; NANOSHEETS; STABILITY; COMPOSITE; SIZE;

D O I：

10.1002/cplu.201402267

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Li1.16Mn1.84O4 nanoparticles (50-90nm) with cubic spinel structure are synthesized by combining a microemulsion process to produce ultrafine Mn(OH)(2) nanocrystals (3-8nm) with a solid-state lithiation step. The nanostructured lithium-rich Li1.16Mn1.84O4 shows stable cycling performance and superior rate capabilities as compared with the corresponding bulk material, for example, the nano-sized Li1.16Mn1.84O4 electrode shows stable reversible capacities of 74mAhg(-1) during the 1000thcycle at a high rate of 40C between 3.0 and 4.5V. In addition, Li1.16Mn1.84O4 nanoparticles also show high Li storage properties over an enlarged voltage window of 2.0-4.5V with high capacities and stable cyclability, for example, delivering discharge capacities of 209 and 114mAhg(-1) at rates of 1 and 20C, respectively.

引用

页码：1794 / 1798

页数：5

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