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Updated: May 23, 2026
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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
Published on: August 12, 2013
Multifunctional Nanofibers Enable Dual-Network Polymer Electrolytes for High-Performance Lithium Metal Batteries
Dongdong Bai1, Bo Dong1, Dong Wang1
1Institute of Functional Textiles and Advanced Materials, National Engineering Research Center for Advanced Fire-Safety Materials D & A (Shandong), College of Textiles and Clothing, Qingdao University, 308 Ningxia Road, Qingdao 266071, China.
ACS Macro Letters
|May 22, 2026
Summary
A novel dual-network polymer electrolyte enhances lithium metal battery safety and performance. This design improves electrochemical stability and enables robust solid electrolyte interphase formation for next-generation energy storage.
Area of Science:
- Materials Science
- Electrochemistry
- Polymer Science
Background:
- Solid-state polymer-based lithium metal batteries (LMBs) are crucial for high-energy-density storage.
- Challenges include fragile solid electrolyte interphase (SEI) and limited oxidation stability of polymer electrolytes (PEs).
- Need for advanced polymer electrolytes to overcome these limitations.
Purpose of the Study:
- To design and synthesize a high-performance polymer electrolyte for LMBs.
- To improve electrochemical stability and interfacial properties.
- To enable the practical application of high-voltage LMBs.
Main Methods:
- Developed a "physical-chemical" dual-network polymer electrolyte.
- Incorporated poly(vinyl alcohol) (PVA) and Hexakis (1,2,4-triazol-3-ylamino) cyclotriphosphazene (HATA) for a physical network via hydrogen bonding.
- Integrated a chemical network using 2-(((3-(aziridin-1-yl)propionyl)oxy)methyl)-2-ethylpropylene-1,3-diol bis(3-(aziridin-1-yl)propionate) (TTMAP) and 1,3-dioxolane (DOL) monomers.
- Utilized heteroatom (P, N) incorporation for synergistic effects.
Main Results:
- Achieved an expanded electrochemical stability window of 5.8 V.
- Demonstrated excellent capacity retention in Li||LiFePO4 (87.1% after 400 cycles) and Li||LiNi0.8Co0.1Mn0.1O2 (77.9% after 100 cycles) batteries.
- Facilitated a robust organic-inorganic hybrid SEI layer on the Li anode, enabling stable plating/stripping for over 1000 hours without dendrites.
Conclusions:
- The dual-network polymer electrolyte with heteroatom incorporation offers a promising pathway for advanced LMBs.
- The design overcomes key challenges of SEI fragility and oxidation stability.
- The engineered electrolyte enables high-voltage compatibility and improved battery safety and longevity.
