| Autor: |
Dongming Cheng, Cui Sun, Zhongling Lang, Jinhua Zhang, Ajuan Hu, Jianing Duan, Xinyu Chen, Hong-Ying Zang, Jiajia Chen, Mingsen Zheng, Quanfeng Dong |
| Jazyk: |
angličtina |
| Rok vydání: |
2022 |
| Předmět: |
|
| Zdroj: |
Cell Reports Physical Science, Vol 3, Iss 3, Pp 100731- (2022) |
| Druh dokumentu: |
article |
| ISSN: |
2666-3864 |
| DOI: |
10.1016/j.xcrp.2021.100731 |
| Popis: |
Summary: High ion conductivity and low electrode-electrolyte interface resistance are intensively pursued topics for the development of solid-state Li-ion batteries with high safety and energy density. Here, we propose a design using keto-enamine covalent organic frameworks (TPBD) and polyethylene oxide (PEO) to prepare a solid-state electrolyte (TPBD-LiPF6@PEO), achieving a high ion conductivity of 0.543 mS cm−1 at 25°C and optimizing the electrode-electrolyte interface resistance in Li-ion batteries. Solid-state nuclear magnetic resonance experiments and density functional theory calculations show that the strong interaction between the –C=O site in TPBD and Li+ ions promotes the dissociation of LiPF6. The assembled LiFePO4|TPBD-LiPF6@PEO|Li batteries without using liquid electrolytes offer a specific capacity of nearly 140 mAh g−1 at 0.2 C with a columbic efficiency of 99.6% after 200 cycles at 25°C. This strategy for preparing solid-state electrolytes provides practical ideas and suggestions in the development of solid-state energy devices. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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