Enabling Fast Ionic Conductivity and Stable Interfaces of Composite Polymer Electrolytes by Incorporating Borohydride‐Oxide Dual Fillers for Solid State Lithium Metal Batteries
Source abstract
Abstract
Abstract Poly ethylene oxide (PEO) composite polymer electrolytes (CPEs) are one of the most promising candidates for all‐solid‐state batteries with high energy density, flexibility and safety. However, the applications of PEO with practicability have been refrained from its poor tensile strength, limited Li‐ion migration and ionic conductivity. In this work, the compact and stable flexible CPEs are prepared by PEO matrix with dual‐fillers of LiBH4 and Al2O3, where Al2O3 with Lewis acid sites can weaken the complexation of Li+ and PEO as well as enhance the dissociation of Li salts. Meanwhile LiBH4 acts as fast ion conductor to provide free Li+ at the interfaces between fillers and PEO. Benefiting from their synergistic effects, both ionic conductivity and interface stability between electrolyte and anode of CPEs are improved greatly while the lithium dendrites is also inhibited. As a result, the PEO/Lithium bis(trifluoromethanesulfonyl)imide(LiTFSI)/(4%LiBH4/4%γ‐Al2O3) CPEs exhibit a high ionic conductivity of 0.3 mS cm−1 and the Li‐Li symmetrical battery can cycle for 800 h at 60 °C.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Advanced Battery Materials and Technologies · Advancements in Battery Materials · Advanced battery technologies research
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Materials Science and Engineering & Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials of Ministry of Education Anhui University of Technology Ma'anshan Anhui 243002 P. R. China
Hunan Engineering Laboratory for preparation Technology of polyvinyl Alcohol Fiber (PVA) Material Huaihua University Huaihua 418000 P. R. China
Technical Development Department Hefei General Machinery Research Institute Hefei Anhui 230031 P. R. China
Key Laboratory of Efficient Conversion and Solid‐state Storage of Hydrogen & Electricity of Anhui Province Anhui University of Technology Ma'anshan Anhui 243002 P. R. China
Funding
National Natural Science Foundation of China · Scientific Research Foundation of Hunan Provincial Education Department · Scientific Research Foundation of Education Department of Anhui Province of China
References (73)
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