Improved Stability and Cyclability of Ceramic Solid Electrolyte by Coating Polymer
| Autor: | Chun-Sheng Jiang, Natalie Seitzman, Chunmei Ban, Chuanxiao Xiao, Harvey Guthrey, Mowafak Al-Jassim, Yanli Yin |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
chemistry.chemical_classification
Materials science Renewable Energy Sustainability and the Environment 020209 energy Ionic bonding 02 engineering and technology Polymer Electrolyte engineering.material Conductivity Condensed Matter Physics Surfaces Coatings and Films Electronic Optical and Magnetic Materials Metal Coating Chemical engineering chemistry visual_art 0202 electrical engineering electronic engineering information engineering Materials Chemistry Electrochemistry visual_art.visual_art_medium engineering Ionic conductivity Ceramic |
| Zdroj: | Journal of The Electrochemical Society. 167:020519 |
| ISSN: | 1945-7111 |
| Popis: | Rechargeable all-solid-state lithium (Li) metal batteries show improved safety and energy density compared to commercial Li-ion batteries using liquid electrolyte. As the key component of Li metal batteries, ceramic solid-state electrolyte has attracted great interest because of its high ion conductivity and great potential in interfacing with Li metal. Ceramic electrolyte has a more stable interface with Li metal than liquid electrolyte, but chemical reaction and Li dendrite growth at the electrolyte/Li interface are still significant, which causes device degradation and failure by cycling of Li plating and stripping. Unlike ceramic electrolyte, polymer electrolyte has a relatively stable interface with Li metal and better mechanical flexibility. Therefore, we introduced a polymer electrolyte coating to protect the ceramic electrolyte from direct contact with Li metal. The galvanotactic cycling Li plating/striping data on the devices with (without) the coating illustrates increased (decreased) overall conductivity and cyclability of the test cell by the cycling. Nanometer-scale ionic-transport imaging, based on atomic force microscopy, shows that cycling degrades the ceramic-only electrolyte by partially blocking ionic transport in areas; in contrast, cycling on the polymer-coated electrolyte improves ionic conductivity. Compared with the ceramic-only electrolyte, this novel polymer electrolyte coating on ceramic electrolyte shows less degradation when in contact with Li metal. |
| Databáze: | OpenAIRE |
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