Journal
ACS APPLIED ENERGY MATERIALS
Volume 4, Issue 11, Pages 12989-12997Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsaem.1c02622
Keywords
solid-state battery; solid polymer electrolyte; integrated structure; interface; adaptability
Funding
- National Natural Science Foundation of China [51474113]
- Technical Innovation Project of Changsha Mining and Metallurgical Institute of China Minmetals Co., Ltd [20190590]
- Chongqing Key Laboratory for Advanced Materials & Technologies of Clean Energies [JJYN202005]
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A rigid-flexible PEA solid electrolyte membrane with high ion conductivity and electrochemical stability was prepared through cross-linking polymerization, improving battery rate performance. This electrolyte shows good adaptability and development prospects for solid-state lithium and lithium metal-free batteries.
Solid polymer electrolyte is expected to be widely used in solid-state lithium batteries due to its good manufacturability and safety. But the low ion conductivity, poor interface combination, and narrow adaptability to different electrodes are hindering the development of solid-state batteries. In this work, a rigid-flexible poly(ether-acrylate) (PEA) solid electrolyte membrane with high room-temperature ion conductivity (1.5 x 10(-4) S/cm), electrochemical stability window (similar to 4.8 V), and lithium ion migration number (0.81) was prepared using a cross-linking polymerization method. The cathode/electrolyte integrated structure was also created via directly coating electrolyte precursor on the cathode surface to improve the cathode/ electrolyte interface combination and decrease the interface impedance, which obviously enhanced the rate performance of the battery. This electrolyte is suitable for LiFePO4, LiCoO2, NCM622 different-voltage cathodes and lithium metal, Si-C, and graphite anodes, showing good practicality and development prospects in solid-state lithium and lithium metal-free batteries due to its good adaptability.
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