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Related Experiment Video

Updated: Jul 8, 2026

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

Published on: August 12, 2013

Functionalization of Defective Covalent Organic Frameworks for High-Performance Solid-State Electrolytes.

Senjie Mi¹, Yayun Geng¹, Yinggu Wang²

¹School of Materials Science and Engineering, East China Jiaotong University, Nanchang, 330013, China.

Small (Weinheim an Der Bergstrasse, Germany)

|September 9, 2025

Summary

Novel covalent organic frameworks (COFs) with tunable ionic and electron-withdrawing groups enhance solid-state electrolyte performance. This breakthrough offers a versatile method for developing advanced lithium-ion batteries.

Keywords:

covalent organic frameworks lithium‐ion conductivity post‐modification solid‐state electrolytes synergistic interaction

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Published on: June 9, 2023

Area of Science:

Materials Science
Electrochemistry
Polymer Chemistry

Background:

Covalent organic frameworks (COFs) are promising for solid-state electrolytes due to their tunable structures and stability.
Improving lithium-ion conductivity in COFs requires incorporating both ionic and electron-withdrawing groups, which is challenging.

Purpose of the Study:

To develop a versatile method for synthesizing functional COFs for solid-state electrolytes.
To investigate the synergistic effects of ionic groups and electron-withdrawing units on ion conductivity.

Main Methods:

Synthesis of novel [3+3] defective COFs with active anchoring sites for post-modification.
Tuning of anionic/cationic groups and electron-withdrawing units to regulate ion conductivity.

Main Results:

COF-ECJTU1-60-SO3Li solid-state electrolytes achieved a lithium-ion conductivity of 1.30 × 10-5 S cm-1 and a high Li+ transference number (tLi+) of 0.87 at 303 K.
A Li/COF-ECJTU1-60-SO3Li/LiFePO4 solid lithium-ion battery showed excellent performance, including 145.7 mAh g-1 initial capacity and 92.71% capacity retention after 100 cycles at 353 K.

Conclusions:

A new approach for constructing functional COFs was presented.
The study systematically explored the synergistic interaction between ionic groups and electron-withdrawing units.
The developed COFs enable the creation of high-performance solid-state electrolytes and batteries.