Controlled synthesis of carbon-coated cobalt sulfide nanostructures in oil phase with enhanced Li storage performances
Author
Shi, Wenhui
Zhu, Jixin
Rui, Xianhong
Cao, Xiehong
Chen, Charlottle
Zhang, Hua
Hng, Huey Hoon
Yan, Qingyu
Date of Issue
2012School
School of Materials Science and Engineering
Abstract
A novel solvothermal process was developed for the synthesis of carbon-coated Co9S8 nanodandelions using 1-dodecanethiol as the sulfur source and the soft template. Replacing 1-dodecanethiol with sulfur powder as the sulfur source leads to the formation of 20 nm Co9S8 nanoparticles without carbon coating. When tested as LIB anode, the C@Co9S8 dandelion delivers a specific capacity of 520 mA h g–1 at a current density of 1 A g–1 (1.8 C) during the 50th cycle, which is much higher than that of Co9S8 nanoparticles (e.g. 338 mA h g–1). Furthermore, the C@Co9S8 dandelion also exhibits excellent high C-rate performance, e.g., depicts a 10th-cycle capacity of 373 mA h g–1 at a current density of 6 A g–1 (10.9 C), which is better than that of many reported anode materials. Such synthesis approach is attractive for the preparation of sulfide anode materials with high Li storage properties.
Type
Journal Article
Series/Journal Title
ACS applied materials & interfaces
Rights
© 2012 American Chemical Society.
Collections
http://dx.doi.org/10.1021/am3003654
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