Journal of Inorganic Materials ›› 2022, Vol. 37 ›› Issue (9): 1016-1022.DOI: 10.15541/jim20210739

Special Issue: 【能源环境】金属有机框架材料

• RESEARCH ARTICLE • Previous Articles     Next Articles

ZIF-8-derived Three-dimensional Silicon-carbon Network Composite for High-performance Lithium-ion Batteries

SU Nana1(), HAN Jingru1, GUO Yinhao1, WANG Chenyu1, SHI Wenhua1, WU Liang1, HU Zhiyi1,2, LIU Jing1, LI Yu1,2(), SU Baolian1,3   

  1. 1. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China
    2. Nanostructure Research Centre (NRC), Wuhan University of Technology, Wuhan 430070, China
    3. Laboratory of Inorganic Materials Chemistry (CMI), University of Namur, Namur B-5000, Belgium
  • Received:2021-12-03 Revised:2022-02-08 Published:2022-09-20 Online:2022-02-21
  • Contact: LI Yu, professor. E-mail: yu.li@whut.edu.cn
  • About author:SU Nana (1997-), female, Master candidate. E-mail: nana.su@whut.edu.cn
  • Supported by:
    National Key R&D Program of China(2016YFA0202602);National Key R&D Program of China(2021YFE0115800);National Natural Science Foundation of China(U20A20122);National Natural Science Foundation of China(52103285);The 111 National Project(B20002);Natural Science Foundation of Hubei Province(2020CFB416);The Fundamental Research Funds for the Central Universities(WUT: 2021III016GX)

Abstract:

Lithium-ion batteries (LIBs) are widely applied to various portable electronic devices and new energy vehicles. However, the traditional graphite anode with low theoretical capacity (372 mAh/g) is unable to meet the need of the rapid development of economy and society. Herein, a zinc-based metallic organic framework (ZIF-8) derived three-dimensional network carbon coated silicon (Si@NC) composite was designed for lithium-ion battery. Firstly, the surface of nano-silicon was chemical modified; secondly, small size ZIF-8 was in situ grown on the silicon surface to form Si@ZIF-8; finally, the three-dimensional network Si@NC composite was obtained by carbonization. Results show that the three-dimensional network porous structure of the Si@NC composite not only limits the volume expansion of silicon, but greatly improves the conductivity of the materials, exhibiting excellent cycle stability and outstanding rate performance. As a result, a discharge specific capacity of 760 mAh/g is maintained at a high current density of 5 A/g. Using commercial material as cathode and Si@NC as anode, the assembled full LIBs demonstrate a capacity retention of 60.4% at 0.4C (1C =160 mA/g) for 50 cycles. These results indicate that the as-synthesized three-dimensional network porous structure of Si@NC composite has a potential practical application for LIBs.

Key words: anode, silicon/carbon, lithium-ion battery, three-dimensional network

CLC Number: