期刊
APPLIED SURFACE SCIENCE
卷 433, 期 -, 页码 367-373出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2017.10.061
关键词
Graphene; Dual-doped; Nano silicon; Hydrothermal self-assembly; Lithium ion batteries
类别
资金
- National Natural Science Foundation of China [51164026]
- Natural Science Foundation of the Inner Mongolia autonomous region, china [2015BS0512]
- School of materials and metallurgy young talent incubator platform support project [2014CY012]
Silicon is one of the most promising candidates for next-generation anode of Lithium-ion batteries. However , poor electrical conductivity and large volume change during alloying/dealloying hinder its practical use. Here we reported a three-dimensional (3D) nitrogen and sulfur codoped graphene supported silicon nanoparticles composite (SN-G/Si) through one-step hydrothermal self-assembly. The obtained SN-G/Si was investigated in term of instrumental characterizations and electrochemical properties. The results show that SN-G/Si as a freestanding anode in LIBs delivers a reversible capacity of 2020 mAh g(-1) after 100 cycles with coulombic efficiency of nearly 97%. The excellent electrochemical performance is associated with the unique structure and the synergistic effect of SN-G/Si, in which SN-G provides volume buffer for nano Si as the flexible loader, short paths/fast channels for electron/Li ion transport as porous skeleton, and low charge-transfer resistance. (C) 2017 Elsevier B.V. All rights reserved.
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