Embedded Si/Graphene Composite Fabricated by Magnesium-Thermal Reduction as Anode Material for Lithium-Ion Batteries

• Published in: Nanoscale research letters Vol. 12; no. 1; pp. 627 - 7
• Main Authors: Zhu, Jiangliu, Ren, Yurong, Yang, Bo, Chen, Wenkai, Ding, Jianning
• Format: Journal Article
• Language: English
• Published: New York Springer US 16.12.2017; Springer Nature B.V; SpringerOpen
• Subjects: Anode material; Anodes; Batteries; Chemistry and Materials Science; Electrode materials; Embedded Si/graphene composite; Graphene; Lithium; Lithium-ion batteries; Magnesium; Magnesium-thermal reduction; Materials Science; Molecular Medicine; Nano Express; Nanochemistry; Nanoscale Science and Technology; Nanotechnology; Nanotechnology and Microengineering; Rechargeable batteries; Silicon dioxide; Tetraethyl orthosilicate; Thermal reduction; Anode material; Magnesium-thermal reduction; Embedded Si/graphene composite
• ISSN: 1931-7573; 1556-276X
• DOI: 10.1186/s11671-017-2400-6

Embedded Si/graphene composite was fabricated by a novel method, which was in situ generated SiO 2 particles on graphene sheets followed by magnesium-thermal reduction. The tetraethyl orthosilicate (TEOS) and flake graphite was used as original materials. On the one hand, the unique structure of as-obtained composite accommodated the large volume change to some extent. Simultaneously, it enhanced electronic conductivity during Li-ion insertion/extraction. The MR-Si/G composite is used as the anode material for lithium ion batteries, which shows high reversible capacity and ascendant cycling stability reach to 950 mAh·g −1 at a current density of 50 mA·g −1 after 60 cycles. These may be conducive to the further advancement of Si-based composite anode design.