Quasi-Solid Electrolytes for High Temperature Lithium Ion Batteries

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• 作者：Kaushik Kalaga ; Marco-Tulio F. Rodrigues ; Hemtej Gullapalli ; Ganguli Babu ; Leela Mohana Reddy Arava ; Pulickel M. Ajayan
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2015
• 出版时间：November 25, 2015
• 年：2015
• 卷：7
• 期：46
• 页码：25777-25783
• 全文大小：445K
• ISSN：1944-8252

文摘

Rechargeable batteries capable of operating at high temperatures have significant use in various targeted applications. Expanding the thermal stability of current lithium ion batteries requires replacing the electrolyte and separators with stable alternatives. Since solid-state electrolytes do not have a good electrode interface, we report here the development of a new class of quasi-solid-state electrolytes, which have the structural stability of a solid and the wettability of a liquid. Microflakes of clay particles drenched in a solution of lithiated room temperature ionic liquid forming a quasi-solid system has been demonstrated to have structural stability until 355 掳C. With an ionic conductivity of 鈭?.35 mS cm^鈥?, the composite electrolyte has been shown to deliver stable electrochemical performance at 120 掳C, and a rechargeable lithium battery with Li₄Ti₅O₁₂ electrode has been tested to deliver reliable capacity for over several cycles of charge鈥揹ischarge.