Mechanism of Lithium Storage in MoS2 and the Feasibility of Using Li2S/Mo Nanocomposites as Cathode Materials for Lithium-Sulfur Batteries

被引：158

作者：

Fang, Xiangpeng ^{[1
]}

Guo, Xianwei ^{[1
]}

Mao, Ya ^{[1
]}

Hua, Chunxiu ^{[1
]}

Shen, Lanyao ^{[1
]}

Hu, Yongsheng ^{[1
]}

Wang, Zhaoxiang ^{[1
]}

Wu, Feng ^{[2
]}

Chen, Liquan ^{[1
,3
]}

机构：

[1] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China

[2] Beijing Inst Technol, Sch Chem Engn & Environm, Beijing Key Lab Environm Sci & Engn, Beijing 100081, Peoples R China

[3] Chonnam Natl Univ, Sch Mat Sci & Engn, Kwangju 500757, South Korea

来源：

CHEMISTRY-AN ASIAN JOURNAL | 2012年 / 7卷 / 05期

关键词：

batteries; lithium; molybdenum; redox chemistry; sulfur; HIGH-CAPACITY; PERFORMANCE; ELECTRODE;

D O I：

10.1002/asia.201100796

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The most-popular strategy to improve the cycling stability and rate performance of the sulfur electrode in lithiumsulfur (LiS) batteries is to astrict the sulfur in a conducting medium by using complicated chemical/physical processing. Lithium sulfide (Li2S) has been proposed as an alternative electrode material to sulfur. However, for its application, it must meet challenges such as high instability in air together with all of the drawbacks of a sulfurcontaining electrode. Herein, we report the feasibility of using Li2S, which was obtained by electrochemical conversion of commercial molybdenum disulfide (MoS2) into Li2S and metallic molybdenium (Mo) at low voltages, as a high-performance active material in LiS batteries. Metallic Mo prevented the dissolution of lithium polysulfides into the electrolyte and enhanced the conductivity of the sulfide electrode. Therefore, the in situ electrochemically prepared Li2S/Mo composite exhibited both high cycling stability and high sulfur utilization.

引用

页码：1013 / 1017

页数：5

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