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Related Experiment Video

Updated: Jun 27, 2025

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

Published on: August 12, 2013

Covalent Organic Framework Enhanced Solid Polymer Electrolyte for Lithium Metal Batteries.

Bingyi Ma¹, Lei Zhong¹, Sheng Huang²

¹School of Chemical Engineering and Technology, Sun Yat-sen University, Guangzhou 510275, China.

Molecules (Basel, Switzerland)

|April 27, 2024

Summary

This study introduces a flexible polyethylene oxide-covalent organic framework (PEO-COF) solid electrolyte for lithium metal batteries. The PEO-COF membrane enhances lithium-ion transport and stability, enabling dendrite-free battery cycling and improved performance.

Keywords:

covalent organic frameworks lithium metal batteries solid polymer electrolyte

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Focused Ion Beam Fabrication of LiPON-based Solid-state Lithium-ion Nanobatteries for In Situ Testing

Focused Ion Beam Fabrication of LiPON-based Solid-state Lithium-ion Nanobatteries for In Situ Testing

Published on: March 7, 2018

Area of Science:

Materials Science
Electrochemistry
Polymer Science

Background:

Solid-state lithium metal batteries (LMBs) require electrolytes with high ionic conductivity, mechanical stability, and a wide electrochemical window.
Covalent organic frameworks (COFs) offer ordered channels for ion transport and tunable functional groups, making them promising for solid electrolyte applications.

Purpose of the Study:

To develop a flexible polyethylene oxide-COF-LZU1 (PEO-COF) solid electrolyte membrane for enhanced LMB performance.
To investigate the effect of COF incorporation on lithium-ion transference number, mechanical strength, and electrochemical stability.

Main Methods:

Fabrication of a flexible PEO-COF electrolyte membrane.
Characterization of ionic conductivity, lithium-ion transference number, and mechanical properties.
Electrochemical testing of LiFePO4|PEO-COF/Li and Li/Li symmetrical cells.

Main Results:

The PEO-5% COF-LZU1 electrolyte achieved a high lithium ion transference number of 0.43, significantly higher than neat PEO (0.18).
The electrolyte demonstrated dendrite-free lithium deposition and improved cycling stability in LiFePO4|PEO-COF/Li cells, with 80% capacity retention after 200 cycles.
Li/Li symmetrical cells with PEO-COF exhibited enhanced working stability at various current densities compared to PEO.

Conclusions:

The incorporation of COF-LZU1 into PEO significantly enhances the comprehensive performance of the solid electrolyte.
The PEO-COF electrolyte shows great potential for application in dendrite-free, long-cycling solid-state lithium metal batteries.