Sulfur-impregnated MWCNT microball cathode for Li-S batteries

被引：12

作者：

Choi, Jin-Hoon ^{[1
,3
,4
]}

Lee, Cho-Long ^{[1
]}

Park, Kyu-Sung ^{[2
]}

Jo, Sung-Moo ^{[3
]}

Lim, Dae-Soon ^{[4
]}

Kim, Il-Doo ^{[1
]}

机构：

[1] Korea Adv Inst Sci & Technol, Dept Mat Sci & Engn, Taejon 305701, South Korea

[2] Univ Texas Austin, Texas Mat Inst, Austin, TX 78712 USA

[3] Korea Inst Sci & Technol, Carbon Convergence Mat Res Div, Seoul 136791, South Korea

[4] Korea Univ, Dept Mat Sci & Engn, Seoul 136713, South Korea

来源：

RSC ADVANCES | 2014年 / 4卷 / 31期

基金：

新加坡国家研究基金会;

关键词：

HIGH-CAPACITY; COMPOSITE CATHODES; LITHIUM; ELECTRODES; PARTICLES; NANOTUBES; DISCHARGE; CHARGE;

D O I：

10.1039/c4ra01919a

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We report a facile synthesis, via an electrostatic spray route, of MWCNT microballs that are used as highly porous templates for effective sulfur impregnation. Mesoporous MWCNT microballs with a three-dimensional interpenetrating network structure offer a promising solution to not only maximize the energy density but also guarantee high power capability. Furthermore, the high specific surface area (175.24 m(2) g(-1)) of the microballs provides large pore volumes suitable for effective sulfur impregnation. A sulfur-impregnated MWCNT cathode showed superior electrochemical cell performance for long-term and high rate capability. In particular, sulfur-impregnated MWCNT microball based electrodes have a significant advantage to secure a mechanically robust carbon structure with better electrical contact during cycling.

引用

页码：16062 / 16066

页数：5

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