Revealing the Superiority of Fast Ion Conductor in Composite Electrolyte for Dendrite-Free Lithium-Metal Batteries
| Autor: | Jia-Yan Liang, Min Yan, Chun-Jiao Zhou, Sen Xin, Hui Chen, Xin-Rong Dong, Yu-Guo Guo, Xiongwei Wu, Xian-Xiang Zeng |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Composite number 02 engineering and technology Dielectric Electrolyte 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Nanoceramic 0104 chemical sciences visual_art visual_art.visual_art_medium Fast ion conductor Ionic conductivity General Materials Science Ceramic Composite material 0210 nano-technology Electrical conductor |
| Zdroj: | ACS Applied Materials & Interfaces. 13:22978-22986 |
| ISSN: | 1944-8252 1944-8244 |
| DOI: | 10.1021/acsami.1c04115 |
| Popis: | Composite electrolytes composed of a nanoceramic and polymer have been widely studied because of their high ionic conductivity, good Li-ion transference number, and excellent machinability, whereas the intrinsic reason for the improvement of performance is ambiguous. Herein, we have designed a functional polymer skeleton with different types of nanofiller to reveal the superiority of fast ion conductors in composite electrolyte. Three types of ceramics with different dielectric constants and Li-ion transfer ability were selected to prepare composite electrolytes, the composition, structure, and electrochemical performances of which were systematically investigated. It was found that the addition of fast ion conductive ceramics could provide a high Li-ion transference ability and decreased diffusion barrier because the additional pathways existed in the ceramic, which are revealed by experiment and density functional theory calculations. Benefiting from the superiority of fast ion conductor, Li-metal batteries with this advanced composite electrolyte exhibit an impressive cycling stability and enable a dendrite-free Li surface after cycling. Our work enriches the understanding of the function of fast ion conductors in composite electrolyte and guides the design for other high-performance composite electrolytes in rechargeable solid batteries. |
| Databáze: | OpenAIRE |
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