Synergetic Effect of Yolk-Shell Structure and Uniform Mixing of SnS-MoS2 Nanocrystals for Improved Na-Ion Storage Capabilities

被引：108

作者：

Choi, Seung Ho ^{[1
]}

Kang, Yun Chan ^{[1
]}

机构：

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

来源：

ACS APPLIED MATERIALS & INTERFACES | 2015年 / 7卷 / 44期

基金：

新加坡国家研究基金会;

关键词：

metal sulfide; nanostructure; anode material; sodium batteries; spray pyrolysis; HIGH-PERFORMANCE ANODE; GRAPHENE OXIDE COMPOSITE; HIGH-CAPACITY; HOLLOW MICROSPHERES; ELECTRODE MATERIALS; SODIUM; BATTERIES; LI; NANOFIBERS; NANOSHEETS;

D O I：

10.1021/acsami.5b07093

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Mixed metal sulfide composite microspheres with a yolk-shell structure for sodium-ion batteries are studied. Tin-molybdenum oxide yolk-shell microspheres prepared by a one-pot spray pyrolysis process transform into yolk-shell SnS-MoS2 composite microspheres. The discharge capacities of the yolk-shell and dense-structured SnS-MoS2 composite microspheres for the 100th cycle are 396 and 207 mA h g(-1), and their capacity retentions measured from the second cycle are 89 and 47%, respectively. The yolk-shell SnS-MoS2 composite microspheres with high structural stability during repeated sodium insertion and desertion processes have low charge-transfer resistance even after long-term cycling. The synergetic effect of the yolk-shell structure and uniform mixing of the SnS and MoS2 nanocrystals result in the excellent sodium-ion storage properties of the yolk-shell SnS-MoS2 composite microspheres by improving their structural stability during cycling.

引用

页码：24694 / 24702

页数：9

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