Citation: Chunna Cui, Liang He, Xingtong Guo, Pengfei Wu, Jitao Huang, Tao Wei. Lithiated sulfonated covalent organic frameworks as active fillers in solid polymer electrolytes for room-temperature all-solid-state lithium batteries[J]. Chinese Chemical Letters, ;2026, 37(12): 111871. doi: 10.1016/j.cclet.2025.111871 shu

Lithiated sulfonated covalent organic frameworks as active fillers in solid polymer electrolytes for room-temperature all-solid-state lithium batteries

Chunna Cui ^{a, d, 1} ,
Liang He ^{b, 1} ,
Xingtong Guo ^{b, 1} ,
Pengfei Wu ^c ,
Jitao Huang ^{a, *,} ,
Tao Wei ^{b, d, *,}

a.
College of New Energy and Materials, Ningde Normal University, Ningde 352100, China
b.
School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang 212003, China
c.
National Key Laboratory for Development and Utilization of Forest Food Resources, Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, China
d.
Fujian Provincial Key Laboratory of Featured Biochemical and Chemical Materials, Ningde Normal University, Ningde 352100, China

huangjitao818@126.com

wt863@126.com

Received Date: 26 July 2025
Revised Date: 10 September 2025
Accepted Date: 21 September 2025
Available Online: 22 September 2025

Figures(4)

In this study, sulfonic acid group was incorporated into the covalent organic framework (COF) to synthesize TpPa-SO₃H, which was subsequently lithiated to obtain TpPa-SO₃Li. And then a solid composite electrolyte (SCE), integrating PVDF-HFP, TpPa-SO₃Li, and LiTFSI was prepared. The SCE exhibited a high lithium-ion transference number (0.72), as well as a high ionic conductivity at 30 °C (2.15 × 10^–4 S/cm). Electrochemical tests revealed that the Li symmetric cell achieved remarkable cycling stability, sustaining operation for ＞ 500 h at 60 °C (0.2 mA/cm²) and ＞ 1000 h at room temperature (0.1 mA/cm²). The assembled LFP//Li battery exhibited a stable discharge capacity of 129.33 mAh/g after 110 cycles at 0.2 C under room temperature. This COF-based composite electrolyte significantly enhances lithium-ion conduction and interfacial stability, offering a novel material choice and design strategy for advancing next-generation solid-state lithium-ion batteries.
- Covalent organic frameworks (COF),
- Sulfonated-COF,
- PVDF-HFP,
- All solid-state lithium-ion batteries (ASSLBs),
- Solid polymer electrolytes (SPEs)
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