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C/Sn/RGO Nanocomposites as Higher Initial Coulombic Efficiency Anode for Sodium‐Ion Batteries
Author(s) -
Dong Wei,
Yang Shaobin,
Liang Bing,
Shen Ding,
Sun Wen,
Liu Yue,
Zhao Yisong,
Wang Xuelei,
Wu Xiulin
Publication year - 2017
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201702062
Subject(s) - faraday efficiency , materials science , anode , nanocomposite , electrochemistry , metal , chemical engineering , ion , composite number , particle size , particle (ecology) , sodium , graphene , nanotechnology , metallurgy , composite material , chemistry , electrode , oceanography , engineering , organic chemistry , geology
Theoretically, metal Sn owns higher initial coulombic efficiency than SnO 2 in the sodium‐ion batteries (SIBs). Metal Sn is commonly obtained by the thermal reduction of SnO 2 at present. However, the uncontrollable growth of metal Sn particles during the reduction progress is a key challenge. In this work, a composite material of refined metal Sn particles (particle size about 20∼200 nm) and carbon buffer medium has been prepared by a novel method, which is simple thermal reduction adopted after the treatment of SnO 2 /RGO in the pitch kerosene solution. The results show that this method overcomes the uncontrollable growth of metal Sn particles. Electrochemical tests show that C/Sn/RGO possesses a higher initial reversible capacity of 476.2 mAh g −1 , and a higher initial coulombic efficiency of 70.3%. This method would have wider applications for the attractive properties of Na‐ion batteries in the future.