Journal of Inorganic Materials ›› 2024, Vol. 39 ›› Issue (9): 1013-1021.DOI: 10.15541/jim20240027

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) 【信息功能】柔性材料(202409)

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ZIF-L Derived Nitrogen-doped Carbon Nanosheets/Carbon Cloth Self-supported Electrode for Lithium-selenium Battery

XUN Daoxiang1(), LUO Xuwei1, ZHOU Mingran1, HE Jiale1, RAN Maojin1,2, HU Zhiyi1,2, LI Yu1()   

  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
  • Received:2024-01-11 Revised:2024-03-19 Published:2024-09-20 Online:2024-05-08
  • Contact: LI Yu, professor. E-mail: yu.li@whut.edu.cn
  • About author:XUN Daoxiang (1998-), male, Master candidate. E-mail: xundaoxiang@whut.edu.cn
  • Supported by:
    National Natural Science Foundation of China(U22B6011);National Natural Science Foundation of China(22275142);National Natural Science Foundation of China(52103285);The 111 National Project(B20002);Natural Science Foundation of Hubei Province(2020CFB416)

Abstract:

Selenium (Se) is considered as a new generation energy storage material of lithium-selenium (Li-Se) battery due to its high volume specific capacity (3253 mAh·cm-3) and high electronic conductivity (1×10-5 S·m-1). To address the problems of volume expansion, fast capacity decay, and low utilization of active materials during its charging-discharging process, a ZIF-L derived nitrogen-doped nanosheets/selenium (Se@NC/CC) flexible self-supported composite electrode is designed in this study for lithium-selenium battery by growing two-dimensional zinc-based metallic organic framework (ZIF-L) on carbon cloth (CC). The rich microporous structure in the nitrogen-doped carbon nanosheets can effectively alleviate the volume expansion during the reaction process, and the doping of heteroatoms N helps to adsorb Li2Se and reduce the loss of active substances. In particular, it is found that there is strong chemical bonding between Se and C in the Se@NC/CC electrode, which also helps to reduce the loss of active materials and improve the performance. Electrochemical results show that the initial discharge specific capacity of the Se@NC/CC electrode is 574 mAh·g-1 at a current density of 0.5C (1.0C=675 mAh·g-1), demonstrating a high initial discharge specific capacity. At a current density of 2.0C, the initial discharge specific capacity is 453.3 mAh·g-1, which maintains at 406.2 mAh·g-1 after cycling for 500 cycles and it also displays excellent rate performance compared to literature. Such a flexible self-supported selenium cathode designed in this study provides a new research route on the design of selenium host materials for advanced alkali metal-selenium batteries.

Key words: lithium-selenium battery, carbon cloth, self-supporting, ZIF-L, carbon nanosheet

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