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Updated: Oct 11, 2025

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

Published on: August 12, 2013

Cyclodextrin-Integrated PEO-Based Composite Solid Electrolytes for High-Rate and Ultrastable All-Solid-State Lithium

Huanhuan Duan¹, Liansheng Li¹, Kaixiang Zou¹

¹The Key Laboratory of Fuel Cell for Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, Peoples Republic of China.

ACS Applied Materials & Interfaces

|November 29, 2021

Summary

This study introduces beta-cyclodextrin (β-CD) as a filler to enhance poly(ethylene oxide) (PEO)-based composite solid electrolytes (CSEs) for all-solid-state lithium batteries (ASSLBs), improving ionic conductivity and mechanical strength.

Keywords:

all-solid-state Li batteries composite solid electrolyte cyclodextrin high-rate capability hydrogen bond networks

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Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques

Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques

Published on: November 11, 2013

Area of Science:

Materials Science
Electrochemistry
Polymer Chemistry

Background:

Poly(ethylene oxide) (PEO)-based composite solid electrolytes (CSEs) are key for all-solid-state lithium batteries (ASSLBs).
Current PEO-based CSEs face challenges with low ionic conductivity and poor mechanical strength, limiting battery capacity and stability.
Developing robust and conductive solid electrolytes is crucial for next-generation battery technologies.

Purpose of the Study:

To investigate beta-cyclodextrin (β-CD) as a novel multifunctional filler for PEO-based CSEs.
To enhance the ionic conductivity and mechanical properties of PEO-based CSEs using β-CD.
To evaluate the performance of β-CD-modified CSEs in lithium-ion battery applications.

Main Methods:

Incorporation of β-cyclodextrin (β-CD) into the PEO matrix to form composite solid electrolytes (CSEs).
Characterization of β-CD dispersion, lithium salt dissociation, and hydrogen bond network formation within the PEO matrix.
Electrochemical testing of Li/Li symmetric cells and LiFePO4-based all-solid-state lithium batteries (ASSLBs).

Main Results:

β-cyclodextrin (β-CD) was uniformly dispersed in the PEO matrix, forming a hydrogen bond network that improved mechanical strength and lithium salt dissociation.
The β-CD-integrated PEO-based CSE exhibited stable lithium plating/stripping for over 1000 hours in Li/Li symmetric cells at a critical current density of 1.0 mA cm⁻².
LiFePO4-based ASSLBs utilizing the modified CSE showed high specific capacities and excellent capacity retention over extended cycling.

Conclusions:

β-cyclodextrin (β-CD) is an effective multifunctional filler for enhancing PEO-based composite solid electrolytes (CSEs).
The hydrogen bonding interactions induced by β-CD significantly improve the ionic conductivity and mechanical stability of CSEs.
This work demonstrates a promising strategy for developing high-performance all-solid-state lithium batteries (ASSLBs).