Graphene-Wrapped Sulfur Particles as a Rechargeable Lithium-Sulfur Battery Cathode Material with High Capacity and Cycling Stability

被引：1955

作者：

Wang, Hailiang ^{[2
]}

Yang, Yuan ^{[1
]}

Liang, Yongye ^{[2
]}

Robinson, Joshua Tucker ^{[2
]}

Li, Yanguang ^{[2
]}

Jackson, Ariel ^{[1
]}

Cui, Yi ^{[1
]}

Dai, Hongjie ^{[2
]}

机构：

[1] Stanford Univ, Dept Mat Sci & Engn, Stanford, CA 94305 USA

[2] Stanford Univ, Dept Chem, Stanford, CA 94305 USA

来源：

NANO LETTERS | 2011年 / 11卷 / 07期

关键词：

Graphene-sulfur composite; rechargeable Li-S battery; high cycling stability; energy storage; NANOSTRUCTURED MATERIALS; ENERGY-CONVERSION; SILICON NANOWIRES; STORAGE DEVICES; ION BATTERIES; LI-BATTERIES; COMPOSITE; HYBRID; PRISTINE; OXIDE;

D O I：

10.1021/nl200658a

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We report the synthesis of a graphene-sulfur composite material by wrapping poly(ethylene glycol) (PEG) coated submicrometer sulfur particles with mildly oxidized graphene oxide sheets decorated by carbon black nanoparticles. The PEG and graphene coating layers are important to accommodating volume expansion of the coated sulfur particles during discharge, trapping soluble polysulfide intermediates, and rendering the sulfur particles electrically conducting. The resulting graphene sulfur composite showed high and stable specific capacities up to similar to 600 mAh/g over more than 100 cycles, representing a promising cathode material for rechargeable lithium batteries with high energy density.

引用

页码：2644 / 2647

页数：4

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