Chinese Journal of Applied Chemistry ›› 2022, Vol. 39 ›› Issue (5): 779-786.DOI: 10.19894/j.issn.1000-0518.210141

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Controllable Construction of Porous Nanocube FeSe2/Graphene Composite for Efficient Na⁃Ion Storage

Fu-Yang WANG1, Wei-Ming SONG1(), Li SUN1, Jian FENG2, Jun YE1, Zhi-Qi YANG1   

  1. 1.School of Chemistry and Chemical Engineering,Qiqihar University,Qiqihar 161006,China
    2.School of Materials Science and Engineering,Northeastern University,Shenyang 110819,China
  • Received:2021-03-24 Accepted:2021-07-28 Published:2022-05-01 Online:2022-05-24
  • Contact: Wei-Ming SONG
  • About author:qdsongweiming@163.com
  • Supported by:
    the Basic Scientific Research Business Expenses of Provincial Colleges and Universities in Heilongjiang Province(135109102);Qiqihar University Postgraduate Innovation Research Project(YJSCX2019038)

Abstract:

The design of anode materials with higher specific capacity and cycle stability is very important for the development of sodium ion batteries. Transition metal selenide has become a potential anode electrode material because of its higher theoretical capacity. However, selenide has a low conductivity and a large volume expansion occurs during the insertion/extraction of sodium ions, resulting in a rapid decrease in specific capacity. Therefore, structural control is particularly important. The FeSe2/rGO composite material with more active sites and more stable structure was prepared by conventional hydrothermal method to grow porous nanocube FeSe2in situ on two-dimensional reduced graphene oxide(rGO). When used as an anode material for Sodium ion battery(SIBs), the FeSe2/rGO electrode has excellent rate capacity of 694.6 mA?h/g at 0.2 A/g, and high reversible capacity of 300.0 mA?h/g at 2.0 A/g after 300 cycles.

Key words: FeSe2/rGO, Sandwich structure, Sodium ion batteries, Anode material

CLC Number: