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Quasi-Solid-State Dual-Ion Sodium Metal Batteries for Low-Cost Energy Storage
Chem ( IF 23.5 ) Pub Date : 2020-02-10 , DOI: 10.1016/j.chempr.2020.01.008
Xiaofu Xu , Kui Lin , Dong Zhou , Qi Liu , Xianying Qin , Shuwei Wang , Shun He , Feiyu Kang , Baohua Li , Guoxiu Wang

Dual-ion sodium metal||graphite batteries are a viable technology for large-scale 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 dual-ion 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-solid-state 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.



中文翻译:

用于低成本储能的准固态双离子钠金属电池

双离子钠金属电池具有较高的工作电压(相对于Na / Na +为4.4 V以上)和电极材料的低成本,因此是用于大规模固定式能量存储的可行技术。然而,传统的液体电解质通常在如此高的电压下遭受严重的分解,这导致较差的循环寿命。在此,我们报告了一种稳定的采用多功能凝胶聚合物电解质的双离子钠金属电池,该电解质易于通过原位制备以碳酸氟代亚乙酯为助溶剂和1,3-丙磺酸内酯为助剂,在优化的液体电解质中聚合乙氧基化季戊四醇四丙烯酸酯单体。该准固态电解质不仅表现出高的抗氧化性并且在电极表面上构造了稳定的保护层,而且还有效地促进了均一的阴离子和阳离子通量并抑制了钠树枝状晶体的生长。已开发的准固态双离子电池具有高容量和长循环寿命,可用于低成本储能。

更新日期:2020-02-10
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