Citation: Haiyang Liao, Tiemin Xiao, Tengfei Zhang, Chiam Wen Liew, Xiaofei Duan, Jiayi Su, Hongjin Kuang, Xiaolong Feng, Ting Li, Yongqi Zhang. Zwitterionic poly(ionic liquid)-induced fast structural diffusion electrolytes for lithium metal batteries[J]. Chinese Chemical Letters, ;2026, 37(9): 111344. doi: 10.1016/j.cclet.2025.111344 shu

Zwitterionic poly(ionic liquid)-induced fast structural diffusion electrolytes for lithium metal batteries

Haiyang Liao ^a ,
Tiemin Xiao ^a ,
Tengfei Zhang ^b ,
Chiam Wen Liew ^{c, *,} ,
Xiaofei Duan ^a ,
Jiayi Su ^a ,
Hongjin Kuang ^a ,
Xiaolong Feng ^a ,
Ting Li ^d ,
Yongqi Zhang ^{b, *,}

a.
School of Mechanical Engineering, Hunan University of Technology, Zhuzhou 412007, China
b.
Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 611731, China
c.
Department of Physical Science, Faculty of Applied Sciences, Tunku Abdul Rahman University of Management and Technology, Jalan Genting Kelang, Kuala Lumpur 53300, Malaysia
d.
New Powertrain Development Division, Chongqing Chang'an Automobile Co., Ltd., Chongqing 401133, China

liewcw@tarc.edu.my

yqzhang@uestc.edu.cn

Received Date: 19 January 2025
Revised Date: 16 May 2025
Accepted Date: 19 May 2025
Available Online: 20 May 2025

Figures(4)

Poly(ethylene oxide) (PEO) electrolytes present a promising option for next-generation solid-state high-energy-density batteries. However, the poor ionic conductivity and inefficiency transference number pose significant barriers to its broader application. Herein, an in-built synthesis of poly(ethylene oxide) with zwitterionic poly(ionic liquid) composite electrolyte (PEO/Zwit PIL) is employed by a thio-lene click reaction. The introduction of Zwit PIL can help the composite electrolyte fully dissociation lithium salts and optimize the solvation structure. Molecular dynamics simulations elucidate fast Li⁺ transport through a structural diffusion mechanism upon the addition of Zwit PIL to the composite electrolyte, simultaneously facilitating a high ionic conductivity and transference number. The composite electrolyte also demonstrates a high self-adhesive to construct a robust and tough electrode-electrolyte interface. The assembled full cell (LiFePO4PEO-Zwit PILLi) exhibits a discharge capacity of 153 mAh/g at 60 ℃ and highly stable cyclic performance up to 200 cycles at 0.2 C. The employment of Zwit PIL within PEO for novel solid-state electrolytes furnishes an alternative approach to the design of high-performance, next-generation, sustainable batteries.
- Polymer electrolyte,
- Lithium metal battery,
- In-built method,
- Zwitterionic poly(ionic liquid),
- Diffusion mechanism
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