Flame-retardant single-ion conducting polymer electrolytes based on anion acceptors for high-safety lithium metal batteries
| Autor: | Guan Tianyu, Kuirong Deng, Fuhui Liang, Guangxia Wang, Yuezhong Meng, Yangfan Zhang, Lai Wei, Xiaoqiong Zheng, Zhenping Qiu, Qingguang Zeng, Liu Zheng, Min Xiao |
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| Rok vydání: | 2021 |
| Předmět: |
Conductive polymer
Materials science Renewable Energy Sustainability and the Environment Pinacol Ionic bonding 02 engineering and technology General Chemistry Electrolyte 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Acceptor 0104 chemical sciences Anode chemistry.chemical_compound Chemical engineering chemistry Ionic conductivity General Materials Science 0210 nano-technology Flammability |
| Zdroj: | Journal of Materials Chemistry A. 9:7692-7702 |
| ISSN: | 2050-7496 2050-7488 |
| DOI: | 10.1039/d0ta12437k |
| Popis: | Solid-state lithium metal batteries (LMBs) assembled with polymer electrolytes (PEs) and lithium metal anodes are promising batteries owing to their enhanced safety and ultrahigh theoretical energy densities. Nevertheless, polymer electrolytes (PEs) suffer from low ionic conductivities, low lithium-ion transference numbers (LITNs) and high flammability. To address these issues, a novel nonflammable single-ion conducting polymer electrolyte (AEP) with ultrahigh ionic conductivity, unity LITN, excellent flame retardance and high flexibility has been developed. Allylboronic acid pinacol ester (AAPE) is incorporated into the 3D cross-linking network of AEP to act as the anion acceptor that traps the anions, improving the LITN to 0.79. AEP possesses an ultrahigh ionic conductivity of 2.52 mS cm−1 at 25 °C. AEP cannot be ignited by flame. AEP can construct robust LiF-rich SEIs on lithium metal anodes and effectively suppress dendrite growth. LiFePO4 cells assembled with AEP demonstrate excellent rate capacity (specific capacity of 112.4 mA h g−1 at 5C rate) and long-term cycling stability (93.2% capacity retention after 500 cycles). This work provides a promising approach to prepare new PEs for high-safety, high-stability and high-energy LMBs. |
| Databáze: | OpenAIRE |
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