Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Air-Stable and Low-Cost High-Voltage Hydrated Eutectic Electrolyte for High-Performance Aqueous Aluminum-Ion Rechargeable Battery with Wide-Temperature Range
ACS Nano ( IF 17.1 ) Pub Date : 2024-05-08 , DOI: 10.1021/acsnano.4c01276 Xiansheng Luo 1 , Rui Wang 1 , Longhai Zhang 1 , Zixiang Liu 1 , Hongbao Li 1 , Jianfeng Mao 2 , Shilin Zhang 2 , Junnan Hao 2 , Tengfei Zhou 1 , Chaofeng Zhang 1
ACS Nano ( IF 17.1 ) Pub Date : 2024-05-08 , DOI: 10.1021/acsnano.4c01276 Xiansheng Luo 1 , Rui Wang 1 , Longhai Zhang 1 , Zixiang Liu 1 , Hongbao Li 1 , Jianfeng Mao 2 , Shilin Zhang 2 , Junnan Hao 2 , Tengfei Zhou 1 , Chaofeng Zhang 1
Affiliation
|
Aqueous aluminum-ion batteries (AAIBs) are considered as a promising alternative to lithium-ion batteries due to their large theoretical capacity, high safety, and low cost. However, the uneven deposition, hydrogen evolution reaction (HER), and corrosion during cycling impede the development of AAIBs, especially under a harsh environment. Here, a hydrated eutectic electrolyte (AATH40) composed of Al(OTf)3, acetonitrile (AN), triethyl phosphate (TEP), and H2O was designed to improve the electrochemical performance of AAIBs in a wide temperature range. The combination of molecular dynamics simulations and spectroscopy analysis reveals that AATH40 has a less-water-solvated structure [Al(AN)2(TEP)(OTf)2(H2O)]3+, which effectively inhibits side reactions, decreases the freezing point, and extends the electrochemical window of the electrolyte. Furthermore, the formation of a solid electrolyte interface, which effectively inhibits HER and corrosion, has been demonstrated by X-ray photoelectron spectroscopy, X-ray diffraction tests, and in situ differential electrochemical mass spectrometry. Additionally, operando synchrotron Fourier transform infrared spectroscopy and electrochemical quartz crystal microbalance with dissipation monitoring reveal a three-electron storage mechanism for the Al//polyaniline full cells. Consequently, AAIBs with this electrolyte exhibit improved cycling stability within the temperature range of −10–50 °C. This present study introduces a promising methodology for designing electrolytes suitable for low-cost, safe, and stable AAIBs over a wide temperature range.
中文翻译：
用于宽温高性能水系铝离子充电电池的空气稳定且低成本的高压水合共晶电解质
水系铝离子电池（AAIB）由于其理论容量大、安全性高、成本低而被认为是锂离子电池的有前途的替代品。然而，不均匀沉积、析氢反应（HER）和循环过程中的腐蚀阻碍了AAIBs的发展，特别是在恶劣的环境下。这里，设计了由 Al(OTf) 3 、乙腈 (AN)、磷酸三乙酯 (TEP) 和 H 2 O 组成的水合共晶电解质 (AATH40)，以改善电化学性能。 AAIB 在宽温度范围内的性能。分子动力学模拟和光谱分析相结合表明AATH40具有较少水溶剂化的结构[Al(AN) 2 (TEP)(OTf) 2 (H 2 O)] 3+ ，有效抑制副反应，降低凝固点，延长电解液的电化学窗口。此外，X射线光电子能谱、X射线衍射测试和原位微分电化学质谱分析证明了固体电解质界面的形成，可有效抑制HER和腐蚀。此外，操作同步加速器傅立叶变换红外光谱和具有耗散监测的电化学石英晶体微天平揭示了Al//聚苯胺全电池的三电子存储机制。因此，使用这种电解质的 AAIB 在 -10–50 °C 的温度范围内表现出更高的循环稳定性。本研究介绍了一种有前途的方法，用于设计适合在宽温度范围内低成本、安全且稳定的 AAIB 的电解质。
更新日期：2024-05-08
中文翻译：
用于宽温高性能水系铝离子充电电池的空气稳定且低成本的高压水合共晶电解质
水系铝离子电池（AAIB）由于其理论容量大、安全性高、成本低而被认为是锂离子电池的有前途的替代品。然而，不均匀沉积、析氢反应（HER）和循环过程中的腐蚀阻碍了AAIBs的发展，特别是在恶劣的环境下。这里，设计了由 Al(OTf) 3 、乙腈 (AN)、磷酸三乙酯 (TEP) 和 H 2 O 组成的水合共晶电解质 (AATH40)，以改善电化学性能。 AAIB 在宽温度范围内的性能。分子动力学模拟和光谱分析相结合表明AATH40具有较少水溶剂化的结构[Al(AN) 2 (TEP)(OTf) 2 (H 2 O)] 3+ ，有效抑制副反应，降低凝固点，延长电解液的电化学窗口。此外，X射线光电子能谱、X射线衍射测试和原位微分电化学质谱分析证明了固体电解质界面的形成，可有效抑制HER和腐蚀。此外，操作同步加速器傅立叶变换红外光谱和具有耗散监测的电化学石英晶体微天平揭示了Al//聚苯胺全电池的三电子存储机制。因此，使用这种电解质的 AAIB 在 -10–50 °C 的温度范围内表现出更高的循环稳定性。本研究介绍了一种有前途的方法，用于设计适合在宽温度范围内低成本、安全且稳定的 AAIB 的电解质。
京公网安备 11010802027423号