期刊
CHEM
卷 6, 期 4, 页码 902-918出版社
CELL PRESS
DOI: 10.1016/j.chempr.2020.01.008
关键词
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资金
- National Natural Science Foundation of China of China [51872157]
- Shenzhen Key Laboratory on Power Battery Safety Research [ZDSYS201707271615073]
- Shenzhen Technical Plan Project [JCYJ20170412170911187, JCYJ20170817161753629]
- Guangdong Technical Plan Project [2015TX01N011, 2017B090907005]
- Australian Renewable Energy Agency project [ARENA 2014/RND106]
- Rail Manufactory CRC projects [RMCRC: R1.1.1, R1.1.2]
- Australian Research Council (ARC) Discovery project [DP170100436]
Dual-ion sodium metalligraphite batteries are a viable technology for largescale stationary energy storage because of their high working voltages (above 4.4 V versus Na/Na+) and the low cost of electrode materials. However, traditional liquid electrolytes generally suffer from severe decomposition at such a high voltage, which results in poor cycle life. Herein, we report a stable dualion sodium metal battery employing a multifunctional gel polymer electrolyte, which was facilely prepared by in situ polymerizing an ethoxylated pentaerythritol tetraacrylate monomer in an optimized liquid electrolyte with fluoroethylene carbonate as co-solvent and 1,3-propanesultone as additive. This quasi-solidstate electrolyte not only exhibits high oxidative resistance and constructs stable protective layers on the electrode surfaces but also effectively facilitates homogeneous anion and cation fluxes and suppresses the sodium dendrite growth. The as-developed quasi-solid-state dual-ion batteries delivered a high capacity with long cycle life, which could be applied for low-cost energy storage.
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