title: A Tremella-Like Nanostructure of Silicon@void@graphene-Like Nanosheets Composite as an Anode for Lithium-Ion Batteries.
abstract: Graphene coating is receiving discernable attention to overcome the significant challenges associated with large volume changes and poor conductivity of silicon nanoparticles as anodes for lithium-ion batteries. In this work, a tremella-like nanostructure of silicon@void@graphene-like nanosheets (Si@void@G) composite was successfully synthesized and employed as a high-performance anode material with high capacity, cycling stability, and rate capacity. The Si nanoparticles were first coated with a sacrificial SiO2 layer; then, the nitrogen-doped (N-doped) graphene-like nanosheets were formed on the surface of Si@SiO2 through a one-step carbon-thermal method, and the SiO2 layer was removed subsequently to obtain the Si@void@G composite. The performance improvement is mainly attributed to the good conductivity of N-doped graphene-like nanosheets and the unique design of tremella nanostructure, which provides a void space to allow for the Si nanoparticles expanding upon lithiation. The resulting electrode delivers a capacity of 1497.3 mAh g(-1) at the current density of 0.2 A g(-1) after 100 cycles.
authors.affiliation: Shenzhen Key Laboratory of Functional Polymer, College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, Guangdong, 518060, People's Republic of China.
authors.forename: Hongwei
authors.initials: H
authors.lastname: Mi
authors.affiliation: Shenzhen Key Laboratory of Functional Polymer, College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, Guangdong, 518060, People's Republic of China.
authors.forename: Fang
authors.initials: F
authors.lastname: Li
authors.affiliation: Shenzhen Key Laboratory of Functional Polymer, College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, Guangdong, 518060, People's Republic of China.
authors.forename: Shuxian
authors.initials: S
authors.lastname: Xu
authors.affiliation: Shenzhen Key Laboratory of Functional Polymer, College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, Guangdong, 518060, People's Republic of China.
authors.forename: Ziang
authors.initials: Z
authors.lastname: Li
authors.affiliation: Shenzhen Key Laboratory of Functional Polymer, College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, Guangdong, 518060, People's Republic of China.
authors.forename: Xiaoyan
authors.initials: X
authors.lastname: Chai
authors.affiliation: Shenzhen Key Laboratory of Functional Polymer, College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, Guangdong, 518060, People's Republic of China.
authors.forename: Chuanxin
authors.initials: C
authors.lastname: He
authors.affiliation: Shenzhen Key Laboratory of Functional Polymer, College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, Guangdong, 518060, People's Republic of China. liyli@szu.edu.cn.
authors.forename: Yongliang
authors.initials: Y
authors.lastname: Li
authors.affiliation: Shenzhen Key Laboratory of Functional Polymer, College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, Guangdong, 518060, People's Republic of China. liujh@szu.edu.cn.
authors.forename: Jianhong
authors.initials: J
authors.lastname: Liu
keywords: Lithium-ion batteries; N-doped graphene-like nanosheets; Silicon nanoparticles; Tremella-like