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Nano Research

Article Title

One-step synthesis of novel snowflake-like Si-O/Si-C nanostructures on 3D graphene/Cu foam by chemical vapor deposition

Authors

Jing Ning, The State Key Discipline Laboratory of Wide Band Gap Semiconductor Technology, Xidian University, Xian 710071, China Shaanxi Joint Key Laboratory of Graphene, Xidian University, Xian 710071, China
Dong Wang, The State Key Discipline Laboratory of Wide Band Gap Semiconductor Technology, Xidian University, Xian 710071, China Shaanxi Joint Key Laboratory of Graphene, Xidian University, Xian 710071, China
Jincheng Zhang, The State Key Discipline Laboratory of Wide Band Gap Semiconductor Technology, Xidian University, Xian 710071, China Shaanxi Joint Key Laboratory of Graphene, Xidian University, Xian 710071, China
Xin Feng, The State Key Discipline Laboratory of Wide Band Gap Semiconductor Technology, Xidian University, Xian 710071, China Shaanxi Joint Key Laboratory of Graphene, Xidian University, Xian 710071, China
Ruixia Zhong, The State Key Discipline Laboratory of Wide Band Gap Semiconductor Technology, Xidian University, Xian 710071, China Shaanxi Joint Key Laboratory of Graphene, Xidian University, Xian 710071, China
Jiabo Chen, The State Key Discipline Laboratory of Wide Band Gap Semiconductor Technology, Xidian University, Xian 710071, China Shaanxi Joint Key Laboratory of Graphene, Xidian University, Xian 710071, China
Jianguo Dong, The State Key Discipline Laboratory of Wide Band Gap Semiconductor Technology, Xidian University, Xian 710071, China Shaanxi Joint Key Laboratory of Graphene, Xidian University, Xian 710071, China
Lixin Guo, School of Physics and Optoelectronic Engineering, Xidian University, Xian 710071, China
Yue Hao, The State Key Discipline Laboratory of Wide Band Gap Semiconductor Technology, Xidian University, Xian 710071, China Shaanxi Joint Key Laboratory of Graphene, Xidian University, Xian 710071, China

Keywords

snowflake-like, nanostructures, graphene, chemical vapor deposition (CVD)

Abstract

ABSTRACT The recent development of synthesis processes for three-dimensional (3D) graphene-based structures has tended to focus on continuous improvement of porous nanostructures, doping modification during thin-film fabrication, and mechanisms for building 3D architectures. Here, we synthesized novel snowflakelike Si-O/Si-C nanostructures on 3D graphene/Cu foam by one-step low-pressure chemical vapor deposition (CVD). Through systematic micromorphological characterization, it was determined that the formation mechanism of the nanostructures involved the melting of the Cu foam surface and the subsequent condensation of the resulting vapor, 3D growth of graphene through catalysis in the presence of Cu, and finally, nucleation of the Si-O/Si-C nanostructure in the carbon-rich atmosphere. Thus, by tuning the growth temperature and duration, it should be possible to control the nucleation and evolution of such snowflake-like nanostructures with precision. Electrochemical measurements indicated that the snowflake-like nanostructures showed excellent performance as a material for energy storage. The highest specific capacitance of the Si-O/Si-C nanostructures was ~963.2 mF/cm2 at a scan rate of 1 mV/s. Further, even after 20,000 sequential cycles, the electrode retained 94.4% of its capacitance.

Graphical Abstract

Publisher

Tsinghua University Press

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