期刊
MATERIALS TODAY ENERGY
卷 28, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.mtener.2022.101074
关键词
Interfacial engineering; Gas phase processing; Composite solid polymer electrolyte; Poly (ethylene oxide); All solid-state Li metal batteries
资金
- National Natural Science Foundation of China [22175117]
- Science and Technology Commission of Shanghai Municipality, China [19YF1433300]
- ShanghaiTech University (China) Startup Fund
- Shanghai Key Laboratory of High-resolution Electron Microscopy (Shanghai Sci-ence and Technology Plan) [21DZ2260400]
- Center for High-Resolution Electron Microscopy (C-EM), SPST, ShanghaiTech University [EM02161943]
- Analytical Instrumentation Center, SPST, ShanghaiTech University [SPST-AIC10112914]
Solid-state lithium-metal batteries with composite polymer electrolytes have great potential. By using a vapor phase infiltration (VPI) approach, the volume and interface properties of powdery poly(ethylene oxide) can be modified simultaneously with highly dispersed alumina. This method is beneficial for improving the performance of the battery in both the lithium metal anode and cathode.
Solid-state lithium-metal batteries with composite polymer electrolytes are promising for next-generation energy-storage devices. Typical synthesis strategies of preparing inorganic-polymer composite mainly focused on physical mixing of inorganic fillers with polymer or surface coating of inorganic thin films on polymer, which are hard to suppress Li-dendrite penetration. Here, we demonstrate the bulk and interface properties of powdery poly (ethylene oxide) can be modified simultaneously with highly dispersed alumina using a vapor phase infiltration (VPI) approach. The chemically synthesized alumina with under-coordinated aluminum sites shows strong interaction with PEO, and therefore highly dispersed in the polymer matrix as well as on the surface of the polymer. On the lithium metal anode side, it reduces the interfacial resistance and allows Li vertical bar Li symmetric battery to cycle more than 1400 h under 0.2 mAh/cm(2). On the cathode side, it increases the electrochemical stability window of PEO up to 4.25V without compromising the charge transfer kinetics. The result shows the promise of using VPI as a facile one-step method to tune the properties of the polymer on a large scale for battery applications. (C) 2022 Elsevier Ltd. All rights reserved.
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