Gel electrolytes with a wide potential window for high-rate Al-ion batteries

• Published in: Journal of materials chemistry. A, Materials for energy and sustainability Vol. 7; no. 35; pp. 2348 - 2356
• Main Authors: Yu, Zhijing, Jiao, Shuqiang, Tu, Jiguo, Song, Wei-Li, Lei, Haiping, Jiao, Handong, Chen, Haosen, Fang, Daining
• Format: Journal Article
• Language: English
• Published: Cambridge Royal Society of Chemistry 10.09.2019
• Subjects: Aluminum; Aluminum-ion batteries; batteries; Electrochemical potential; Electrochemistry; Electrolytes; energy; energy density; Energy storage; Enlargement; Flux density; Interface stability; Polymers; Rechargeable batteries; Solid state; Storage systems
• ISSN: 2050-7488; 2050-7496; 2050-7496
• DOI: 10.1039/c9ta06815e

The electrolyte system of rechargeable aluminium-ion batteries (AIBs) is an urgent topic on account of the development in large-scale applications. In addition to the energy storage capabilities, enlargement of the electrolyte potential window is also a significant strategy for substantially boosting the energy density of the AIBs. To achieve these goals, here we demonstrate an Et 3 NHCl-based gel-polymer electrolyte with a wide electrochemical potential window for high-rate quasi-solid-state AIBs. Particularly, such a quasi-solid-state AIB presents stable specific capacities, maintaining around 90 mA h g −1 with long-term cycling under a high current density. More importantly, the Et 3 NHCl-based gel-polymer electrolyte here is not only favorable for increasing the cut-off charging potential, but also has various advantages, including a robust electrode-electrolyte interface, wide-temperature operating abilities and stability in a moist environment. Thus, the results may open a new avenue for low-cost and safe energy storage systems based on electrochemical technologies and applications. A novel gel electrolyte with wide electrochemical potential window for high-rate Al ion batteries is achieved.