Scalable production of transition metal disulphide/graphite nanoflake composites for high-performance lithium storage

被引:29
作者
Duan, Zhi-Qiang [1 ]
Sun, Yan-Chun [2 ]
Liu, Yi-Tao [1 ]
Xie, Xu-Ming [1 ]
Zhu, Xiao-Dong [3 ]
机构
[1] Tsinghua Univ, Dept Chem Engn, Minist Educ, Adv Mat Lab, Beijing 100084, Peoples R China
[2] Chinese Acad Fishery Sci, Heilongjiang River Fishery Res Inst, Harbin 150070, Peoples R China
[3] Harbin Inst Technol, Acad Fundamental & Interdisciplinary Sci, Harbin 150080, Peoples R China
来源
RSC ADVANCES | 2014年 / 4卷 / 78期
基金
中国博士后科学基金; 中国国家自然科学基金;
关键词
LI-ION BATTERIES; FEW-LAYER WS2; MOS2; NANOSHEETS; ANODE MATERIAL; FACILE SYNTHESIS; GRAPHENE SHEETS; IN-SITU; ELECTROCHEMICAL PERFORMANCES; 2-DIMENSIONAL NANOSHEETS; MOS2-GRAPHENE COMPOSITES;
D O I
10.1039/c4ra05640j
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
A facile, industrially viable strategy is proposed for the scalable production of transition metal disulphide/graphite nanoflake composites by a combination of ball milling and short-time sonication. The experimental conditions are mild and energy efficient, and the yields are fairly high. This strategy can produce larger MoS2 and WS2 nanoflakes with more lithium storage sites than the conventional, longtime sonication method. Besides, the obtained graphite nanoflakes have a higher degree of lattice integrity than reduced graphene oxide that is structurally permanently damaged, and can thus serve as a high-efficiency conductive additive. A prominent synergy is witnessed between the excellent electrochemical performances of the MoS2 and WS2 nanoflakes and the high electronic conductivity of the graphite nanoflakes. The resulting MoS2 and WS2/graphite nanoflake composites exhibit superior lithium storage capacities, cycling stabilities and rate capabilities, thus providing a basis for developing high-performance anodes of next-generation lithium-ion batteries.
引用
收藏
页码:41543 / 41550
页数:8
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