<italic style="font-style: italic">In situ</italic> Fabrication of High Performance Gel Electrolyte for Lithium Battery Based on Self-catalyzed Strategy

LI Fen; GUO Kai-rui; XUE Zhi-gang

doi:10.14028/j.cnki.1003-3726.2023.11.014

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In situ Fabrication of High Performance Gel Electrolyte for Lithium Battery Based on Self-catalyzed Strategy

Special Issue: Polymer Research at Huazhong University of Science and Technology | 更新时间：2023-10-12

- In situ Fabrication of High Performance Gel Electrolyte for Lithium Battery Based on Self-catalyzed Strategy
- Polymer Bulletin Vol. 36, Issue 11, Pages: 1570-1579(2023)
- 作者机构：
  
  华中科技大学化学与化工学院，武汉　430074
- 作者简介：
- 基金信息：
- DOI：10.14028/j.cnki.1003-3726.2023.11.014
  CLC：
- Published：20 November 2023，
  
  Received：27 May 2023，
  
  Revised：23 July 2023，
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LI Fen, GUO Kai-rui, XUE Zhi-gang. In situ Fabrication of High Performance Gel Electrolyte for Lithium Battery Based on Self-catalyzed Strategy. [J]. Polymer Bulletin 36(11):1570-1579(2023)
DOI：

LI Fen, GUO Kai-rui, XUE Zhi-gang. In situ Fabrication of High Performance Gel Electrolyte for Lithium Battery Based on Self-catalyzed Strategy. [J]. Polymer Bulletin 36(11):1570-1579(2023) DOI： 10.14028/j.cnki.1003-3726.2023.11.014.

摘要

凝胶聚合物电解质作为一种高锂离子传导效率的聚合物电解质而备受关注。然而，制备凝胶聚合物电解质的过程仍存在催化剂难以脱除、流程繁琐等问题。在本工作中，采用离子液体1-丁基-3-甲基咪唑四氟硼酸盐(BMIMBF

)中潜在的Lewis酸诱导乙烯基醚类单体发生阳离子聚合的策略，探究出一种在电池内部原位构建高性能凝胶聚合物电解质的方法。BMIMBF

的引入提升了凝胶聚合物电解质的电导率和电化学稳定性，基于该凝胶聚合物电解质的锂对称电池能在0.1 mA·cm

-2

电流密度下循环500 h。由该凝胶聚合物电解质原位组装的全电池以1 C的倍率进行恒流充放电，循环100圈后容量保持率为90%；即使在10 C的高倍率下时，电池的放电比容量仍能保持在67.5 mAh·g

-1

。该自催化策略为凝胶聚合物电解质的快速构建提供了新的思路。

Abstract

Gel polymer electrolytes have attracted much attention as a kind of polymer electrolyte with high lithium ion conduction efficiency. However

the process of preparing gel polymer electrolytes still has some problems

such as difficult removal of catalyst and complicated process. In this work

the strategy of cationic polymerization of vinyl ether monomers induced by the potential Lewis acid in the ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate (BMIMBF

) was used to explore a method of

in situ

construction of high performance gel polymer electrolytes inside the battery. The introduction of BMIMBF

has improved the conductivity and electrochemical stability of gel polymer electrolytes. The lithium symmetrical battery based on the gel polymer electrolyte can cycle for 500 h at the current density of 0.1 mA·cm

-2

. The full battery

in situ

assembled by the gel polymer electrolyte is charged and discharged at a rate of 1 C

and the capacity retention is 90% after 100 cycles; Even at a high rate of 10 C

the discharge specific capacity of the battery can still be maintained at 67.5 mAh·g

-1

. The self-catalyzed strategy provides a new idea for the facile fabrication of gel polymer electrolytes.

关键词

锂离子电池凝胶聚合物电解质原位聚合自催化策略

Keywords

Lithium-ion batteriesGel polymer electrolyteIn situ polymerizationSelf-catalyzed strategy

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Related Institution

Hebei Key Laboratory of Flexible Functional Materials,School of Materials Science and Engineering, Hebei University of Science and Technology

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⁰

In situ Fabrication of High Performance Gel Electrolyte for Lithium Battery Based on Self-catalyzed Strategy

DOI：10.14028/j.cnki.1003-3726.2023.11.014

摘要

Abstract

关键词

Keywords

references