title: Controlled synthesis of carbon-coated cobalt sulfide nanostructures in oil phase with enhanced li storage performances.
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.
authors.affiliation: School of Materials Science and Engineering, Nanyang Technological University , Singapore 639798, Singapore.
authors.forename: Wenhui
authors.initials: W
authors.lastname: Shi
authors.forename: Jixin
authors.initials: J
authors.lastname: Zhu
authors.forename: Xianhong
authors.initials: X
authors.lastname: Rui
authors.forename: Xiehong
authors.initials: X
authors.lastname: Cao
authors.forename: Charlottle
authors.initials: C
authors.lastname: Chen
authors.forename: Hua
authors.initials: H
authors.lastname: Zhang
authors.forename: Huey Hoon
authors.initials: HH
authors.lastname: Hng
authors.forename: Qingyu
authors.initials: Q
authors.lastname: Yan