Advancements in Gel Polymer Electrolytes: From Structural Engineering to Functional Applications

Main Article Content

Kaichuan Hou
China University of Petroleum, Beijing, College of New Energy and Materials, No.18 Fuxue Road, Changping District, Beijing 102249, China

DOI: https://doi.org/10.70267/mseac.20265672

Keywords

gel polymer electrolyte, lithium -ion battery, ionic conductivity, lithium -ion transference number, polymer, matrix, functional filler, single-ion conductor

Abstract

Gel polymer electrolytes (GPEs) have emerged as a promising class of quasi -solid-state electrolytes that combine the liquid -like interfacial compatibility of conventional liquid electrolytes with the mechanical integrity and leakage resistance of solid -state systems. Despite these advantages, their deployment in high - energy-density lithium batteries is still constrained by insufficient room -temperature ionic conductivity, low lithium-ion transference number (t Li+), limited mechanical robustness, and unstable electrode/electrolyte interfaces. This review provides a mechanism -guided overview of recent advances in GPEs, with particular emphasis on the coupled regulation of ionic conductivity and t Li+. First, the compositional features, ion - transport mechanisms, and key electrochemical evaluation metrics of GPEs are summarized to establish a unified structure -property framework. Subsequently, three major modification strategies are critically discussed: polymer -matrix engineering for crystallinity suppression and pathway construction, single -ion- conducting and anion -regulating designs for enhancing t Li+, and functional filler incorporation for simultaneously improving mechanical strength, interfacial stability, and ion transport. Representative examples based on cross -linked networks, high -entropy gel systems, porous/aligned polymer frameworks, anion-anchored polymer electrolytes, boron -based anion receptors, inorganic nanofillers, metal -organic frameworks, and covalent organic frameworks are discussed in relation to their underlying mechanisms. Finally, the application prospects of GPEs in high -energy lithium batteries, flexible/wearable devices, and intelligent energy-storage systems are analyzed. Future research directions, including data -driven electrolyte design, scalable in situ manufacturing, and multifunctional integration, are proposed to guide the development of next-generation high-performance GPEs.

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Published
Apr 15, 2026
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Vol. 20 (2026): Proceedings of 2026 International Conference on Materials Science, Energy Engineering and Automation Control (IC-MSEAC 2026)
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Hou, Kaichuan. “Advancements in Gel Polymer Electrolytes: From Structural Engineering to Functional Applications”. Exploring Science Academic Conference Series, vol. 20, Apr. 2026, pp. 56-72, https://doi.org/10.70267/mseac.20265672.