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Updated: Jun 10, 2026
05:33
Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
Published on: August 12, 2013
Regulating Li Solid-State Coordination to Enhance Hopping Kinetics within Polymer Electrolyte of Li Metal Batteries
Hao Peng1, Tairen Long1, Jian Lan1
1State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China.
Journal of the American Chemical Society
|June 8, 2026
Summary
Researchers developed a novel solid-state electrolyte (PDTE) by coordinating lithium ions (Li+) with polymer chains. This breakthrough enhances ion transport and interface stability, paving the way for safer, high-energy solid-state lithium metal batteries.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Solid-state lithium metal batteries (ssLMBs) face challenges with slow ion transport and unstable interfaces.
- Achieving high energy density in ssLMBs requires overcoming these limitations.
Purpose of the Study:
- To explore regulating lithium-ion (Li+) solid-state coordination as a strategy for improving ssLMB performance.
- To develop a novel in situ polymerized solid electrolyte (PDTE) for enhanced battery characteristics.
Main Methods:
- Constructed Li+ coordination with poly-1,3-dioxolane chains and anions to form PDTE.
- Investigated PDTE's ionic conductivity, Li+ transference number, and interfacial compatibility.
- Assembled and tested ssLMBs using LiFePO4 and LiNi0.8Co0.1Mn0.1O2 cathodes with PDTE.
Main Results:
- PDTE achieved an ionic conductivity of 1.45 mS cm-1 and a Li+ transference number of 0.67.
- Li|PDTE|LiFePO4 batteries showed over 1000 cycles at 2C with 92.5% capacity retention and fast-charging capability up to 20C.
- PDTE enabled stable operation across a wide voltage window (2.8-4.5 V) and low temperatures (-20 °C).
Conclusions:
- Regulating Li+ solid-state coordination is a feasible strategy for high-energy ssLMBs.
- PDTE demonstrates excellent ionic conductivity, interfacial compatibility, and electrochemical stability.
- Developed 5.7 Ah solid-state pouch cells with high energy density (513 Wh kg-1) and improved safety.
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