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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
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Hydrogen-Bond Reinforced Composite Electrolytes for Room-/Subzero-Temperature, Highly Stable Lithium Metal Batteries
Dongmei Zhang1, Jiangping Zhang1, Baoyi Wang1
1State Key Laboratory of Alternate Electrical Power System With Renewable Energy Sources, School of New Energy, North China Electric Power University, Beijing, China.
Small (Weinheim an Der Bergstrasse, Germany)
|April 2, 2026
Summary
A new hydrogen-bond strategy using aramid nanofibers and silica nanospheres stabilizes succinonitrile electrolytes for solid-state lithium metal batteries, preventing decomposition and dendrite growth for enhanced cycling.
Area of Science:
- Materials Science
- Electrochemistry
- Battery Technology
Background:
- Succinonitrile (SN)-based electrolytes offer high ionic conductivity for solid-state lithium metal batteries (LMBs).
- SN decomposition on lithium metal anodes hinders stable LMB operation.
Purpose of the Study:
- To enhance the cycling stability of SN-based electrolytes in LMBs.
- To suppress SN decomposition and lithium dendrite formation.
Main Methods:
- Incorporation of aramid nanofibers (ANFs) and amino-functionalized silica (SiO2-NH2) nanospheres into SN electrolytes.
- Utilizing hydrogen-bonding interactions between ANFs/SiO2-NH2 and SN to stabilize the electrolyte.
- Testing Li||Li symmetrical cells and Li||LiFePO4 cells for electrochemical performance.
Main Results:
- Hydrogen bonds formed between ANFs/SiO2-NH2 and SN suppressed SN decomposition.
- Composite electrolyte facilitated uniform Li+ deposition and inhibited dendrite growth.
- Li||Li symmetrical cells exceeded 2600 hours of cycling; Li||LiFePO4 cells showed 700 cycles of stability.
Conclusions:
- The hydrogen-bond strategy effectively enhances the stability of SN-based solid-state LMBs.
- Composite electrolytes demonstrate superior cycling durability and performance in various battery configurations.
- This approach offers a promising pathway for developing highly stable solid-state lithium metal batteries.
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