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Published on: November 10, 2014
Constructing Durable High-Voltage PVDF-Based Solid-State Lithium Metal Batteries via an All-in-One Design
Yuchen Wang1,2, Xinpeng Han2, Keyan Li1
1State Key Laboratory of Fine Chemicals, Frontier Science Center For Smart Materials, PSU-DUT Joint Center for Energy Research, School of Chemical Engineering, Dalian University of Technology, Dalian, China.
Angewandte Chemie (International Ed. in English)
|May 13, 2026
Summary
This study introduces an advanced solid-state electrolyte for lithium metal batteries, overcoming key challenges in ion transport and interface stability. The novel material enables faster charging and longer battery life for next-generation energy storage.
Area of Science:
- Materials Science
- Electrochemistry
- Polymer Science
Background:
- Poly(vinylidene fluoride) (PVDF)-based solid electrolytes are promising for solid-state lithium metal batteries.
- Challenges include high Li+ migration energy barriers and interfacial instabilities, hindering practical application.
Purpose of the Study:
- To develop an 'all-in-one' regulation strategy for PVDF-based solid electrolytes.
- To enhance Li+ transport and interfacial compatibility for improved battery performance.
Main Methods:
- Utilized N-methylimidazolium bis((trifluoromethyl)sulfonyl)imide (MimTFSI) for synergistic engineering.
- Engineered a β-phase polymer matrix and an anion-rich solvation sheath.
- Investigated ionic conductivity, Li symmetric cell cycling, and Li/LiNi0.8Co0.1Mn0.1O2 full cell performance.
Main Results:
- Achieved high ionic conductivity (0.84 mS cm-1).
- Demonstrated stable Li symmetric cell cycling (>4000 h).
- Showcased excellent full cell performance with high capacity retention at various C-rates and expanded voltage windows (e.g., 93.8% after 930 cycles at 0.5 C, 80% after 580 cycles at 4.4 V).
Conclusions:
- The proposed strategy effectively lowers energy barriers and shortens Li+ pathways.
- The integrated solid-state electrolyte offers fast, stable Li+ transport and superior interfacial compatibility.
- The material shows strong applicability for high-performance, next-generation solid-state lithium metal batteries.
