Journal of Inorganic Materials ›› 2022, Vol. 37 ›› Issue (12): 1344-1350.DOI: 10.15541/jim20220224

Special Issue: 【能源环境】超级电容器,锂金属电池,钠离子电池和水系电池(202409)

• RESEARCH ARTICLE • Previous Articles     Next Articles

Hollow-structured CoSe2/C Anode Materials: Preparation and Sodium Storage Properties for Sodium-ion Batteries

WANG Jing1(), XU Shoudong1(), LU Zhonghua1, ZHAO Zhuangzhuang1, CHEN Liang2, ZHANG Ding2, GUO Chunli3   

  1. 1. College of Chemical Engineering and Technology, Taiyuan University of Technology, Taiyuan 030024, China
    2. College of Chemistry, Taiyuan University of Technology, Taiyuan 030024, China
    3. College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China
  • Received:2022-04-16 Revised:2022-05-26 Published:2022-12-20 Online:2022-06-16
  • Contact: XU Shoudong, associate professor. E-mail: xushoudong@tyut.edu.cn
  • About author:WANG Jing (1994-), female, Master candidate. E-mail: 513570705@qq.com
  • Supported by:
    National Natural Science Foundation of China(21606158);National Natural Science Foundation of China(21978193);National Natural Science Foundation of China(21706171);National Natural Science Foundation of China(U1910210);Shanxi Scholarship Council of China(2022-049);Shanxi Scholarship Council of China(2020-048)

Abstract:

Transition metal selenides (TMSs) with the merits of their versatile material species, ample abundance and high theoretical specific capacity have been regarded as attractive anode materials for sodium-ion batteries (SIBs). However, the large volume changes during the electrochemical reactions which result in limited cycle performance hinder their commercialization. Herein, the hollow structure composed of CoSe2 and carbon skeleton (denoted as H-CoSe2/C), derived from the metal organic framework material ZIF-67 using tannic acid as the etching agent, was used as the anode for SIBs. Owing to the unique hollow structure which can alleviate the volume change of the material, H-CoSe2/C exhibited excellent sodium ions storage performances in terms of cycling stability. Compared with the solid counterpart, the reversible specific capacity of the H-CoSe2/C electrode remains 383.4 mAh·g-1 after 350 cycles at a current density of 50 mA·g-1 with the capacity retention of 83.6%. Even at 500 mA·g-1, the capacity retention can still reach 72.2% after 350 cycles. This work manifests that hollow structure can provide enough space to alleviate the problem of volume changes for TMSs during the sodiation/desodiation process, thus the cycle performances can be improved.

Key words: sodium-ion battery, anode material, metal organic framework, CoSe2, hollow structure

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