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SnS/SnSb@C Nanofibers with Enhanced Cycling Stability via Vulcanization as an Anode for Sodium‐Ion Batteries
Author(s) -
Zhu Jian,
Shang Chaoqun,
Wang Zhenyu,
Zhang Junjun,
Liu Ying,
Gu Shuai,
Zhou Liangjun,
Cheng Hua,
Gu Yingying,
Lu Zhouguang
Publication year - 2018
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201701270
Subject(s) - anode , materials science , electrochemistry , carbon nanofiber , nanofiber , sodium , carbon fibers , chemical engineering , ion , vulcanization , cycling , composite number , sulfur , nanotechnology , composite material , electrode , chemistry , metallurgy , natural rubber , carbon nanotube , organic chemistry , archaeology , engineering , history
Exploring resource‐abundant and high‐performance anode materials for sodium‐ion batteries remains a critical challenge in current research. For example, the practical applications of sodium‐ion batteries are restricted by the severe volume variation of active materials on the anode, which often results in irreversible capacity loss and poor cycling performance. Utilizing the different redox potential of metals is shown to be an effective way to alleviating volume changes. Here, we demonstrate that SnS/SnSb‐nanoparticle‐decorated carbon nanofibers (SnS/SnSb@C) prepared via vulcanization are a promising candidate as the anode material for sodium‐ion batteries. The resultant SnS/SnSb@C composites show an impressive electrochemical performance, featuring a large discharge capacity (1028 mAh g −1 at 50 mA g −1 ), rate capability (159 mAh g −1 at 2 A g −1 ), and excellent cycling stability (270 mAh g −1 at 200 mA g −1 after 200 cycles). The different sodiation/desodiation potential of Sn and Sb in the SnS/SnSb@C composite helps to alleviate the volume expansion during cycling, and the defects within carbon nanofibers caused by sulfur doping further promote fast ion and electron transport in sodium‐ion batteries.