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Regulated Hydrated Eutectic Electrolyte Enhancing Interfacial Chemical Stability for Highly Reversible Aqueous Aluminum-Ion Battery with a Wide Temperature Range of −20 to 60 °C
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2024-03-13 , DOI: 10.1002/aenm.202400314 Xiaoyang Zhang 1 , Rui Wang 1 , Zixiang Liu 1 , Quanwei Ma 1 , Hongbao Li 1 , Yangyang Liu 1 , Junnan Hao 2 , Shilin Zhang 2 , Jianfeng Mao 2 , Chaofeng Zhang 1
Advanced Energy Materials ( IF 24.4 ) Pub Date : 2024-03-13 , DOI: 10.1002/aenm.202400314 Xiaoyang Zhang 1 , Rui Wang 1 , Zixiang Liu 1 , Quanwei Ma 1 , Hongbao Li 1 , Yangyang Liu 1 , Junnan Hao 2 , Shilin Zhang 2 , Jianfeng Mao 2 , Chaofeng Zhang 1
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The development of aqueous aluminum-ion batteries (AAIBs) is impeded by pronounced side reactions and hydrogen evolution reaction (HER). Here, an eutectic electrolyte named HEE30 (with an optimal molar ratio of 1:8:1:30 for Al(OTf)3, glycerol (Gly), sodium beta-glycerophosphate pentahydrate (SG), and H2O) to significantly enhance the reversibility of AAIBs across a wide temperature range from −20 to 60 °C is designed. The combination of molecular dynamics simulations and operando synchrotron Fourier-transform infrared spectroscopy reveals that the unique eutectic network significantly enhances the hydrogen bonding between Gly and H2O, reduces the solvation interaction of Al3+ with active H2O, thereby lowering the freezing point, extending electrochemical windows and suppressing HER. The X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD) tests demonstrate that HEE30 is capable of forming a solid electrolyte interface layer consisting of organic and inorganic components, which effectively inhibits corrosion. Additionally, operando synchrotron XRD and ex situ XPS are employed to investigate the changes in lattice peak width and position of the Prussian white cathode, as well as the reversible storage mechanism during cycling This quantitative design offer immediate advantages for the rational development of low-cost and safe energy storage batteries, specifically tailored for wide-temperature operation and durable cycling.
中文翻译：
调节水合共晶电解质增强-20至60°C宽温度范围内高度可逆水系铝离子电池的界面化学稳定性
水系铝离子电池（AAIB）的发展受到明显的副反应和析氢反应（HER）的阻碍。这里，一种名为 HEE30 的共晶电解质（Al(OTf) 3 、甘油 (Gly)、β-甘油磷酸钠五水合物 (SG) 和 H 的最佳摩尔比为 1:8:1:30 2 O) 旨在显着增强 AAIB 在 -20 至 60 °C 的宽温度范围内的可逆性。分子动力学模拟和操作同步加速器傅里叶变换红外光谱相结合表明，独特的共晶网络显着增强了Gly和H 2 O之间的氢键，减少了Al 3+ O 结合，从而降低冰点、延长电化学窗口并抑制 HER。 X射线光电子能谱（XPS）和X射线衍射（XRD）测试表明，HEE30能够形成由有机和无机成分组成的固体电解质界面层，有效抑制腐蚀。此外，还采用操作同步加速器 XRD 和异位 XPS 来研究普鲁士白阴极晶格峰宽和位置的变化，以及循环过程中的可逆存储机制。这种定量设计为低成本的合理开发提供了立竿见影的优势。以及安全的储能电池，专为宽温运行和持久循环而定制。
更新日期：2024-03-13
中文翻译：
调节水合共晶电解质增强-20至60°C宽温度范围内高度可逆水系铝离子电池的界面化学稳定性
水系铝离子电池（AAIB）的发展受到明显的副反应和析氢反应（HER）的阻碍。这里，一种名为 HEE30 的共晶电解质（Al(OTf) 3 、甘油 (Gly)、β-甘油磷酸钠五水合物 (SG) 和 H 的最佳摩尔比为 1:8:1:30 2 O) 旨在显着增强 AAIB 在 -20 至 60 °C 的宽温度范围内的可逆性。分子动力学模拟和操作同步加速器傅里叶变换红外光谱相结合表明，独特的共晶网络显着增强了Gly和H 2 O之间的氢键，减少了Al 3+ O 结合，从而降低冰点、延长电化学窗口并抑制 HER。 X射线光电子能谱（XPS）和X射线衍射（XRD）测试表明，HEE30能够形成由有机和无机成分组成的固体电解质界面层，有效抑制腐蚀。此外，还采用操作同步加速器 XRD 和异位 XPS 来研究普鲁士白阴极晶格峰宽和位置的变化，以及循环过程中的可逆存储机制。这种定量设计为低成本的合理开发提供了立竿见影的优势。以及安全的储能电池，专为宽温运行和持久循环而定制。
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