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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
Published on: August 12, 2013
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Hybrid electrolytes with controlled network structures for lithium metal batteries.
Qiwei Pan1,2, Derrick M Smith2, Hao Qi2
1Department of Material Science and Engineering, South China University of Technology, Guangzhou, 510640, China.
Advanced Materials (Deerfield Beach, Fla.)
|August 29, 2015
Summary
New solid polymer electrolytes (SPEs) offer high conductivity and modulus, preventing lithium dendrite growth for stable, high-performance lithium metal batteries.
Area of Science:
- Materials Science
- Electrochemistry
- Polymer Chemistry
Background:
- Solid polymer electrolytes (SPEs) are crucial for next-generation batteries.
- Developing SPEs with high ionic conductivity, mechanical strength, and dendrite resistance remains a challenge.
Purpose of the Study:
- To synthesize novel SPEs with tunable network structures.
- To evaluate the performance of these SPEs in lithium metal batteries.
Main Methods:
- A facile one-pot reaction was employed using polyhedral oligomeric silsesquioxane and poly(ethylene glycol).
- The resulting SPEs were characterized for conductivity, modulus, and electrochemical stability.
- Lithium metal batteries with LiFePO4 cathodes were assembled and tested.
Main Results:
- The synthesized SPEs demonstrated high ionic conductivity and modulus.
- Superior resistance to lithium dendrite growth was observed, even at high current densities.
- Batteries exhibited excellent cycling stability and rate capability.
Conclusions:
- The developed SPEs offer a promising solution for safe and high-performance lithium metal batteries.
- Tunable network structures in SPEs are key to achieving enhanced electrochemical properties.
Keywords:
lithium dendriteslithium metal batteriespoly(ethylene oxide)polyhedral oligomeric silsesquioxanes (POSS)solid polymer electrolytesMore Related Videos
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