title: Supercapacitor operating at 200 degrees celsius.
abstract: The operating temperatures of current electrochemical energy storage devices are limited due to electrolyte degradation and separator instability at higher temperatures. Here we demonstrate that a tailored mixture of materials can facilitate operation of supercapacitors at record temperatures, as high as 200°C. Composite electrolyte/separator structures made from naturally occurring clay and room temperature ionic liquids, with graphitic carbon electrodes, show stable supercapacitor performance at 200°C with good cyclic stability. Free standing films of such high temperature composite electrolyte systems can become versatile functional membranes in several high temperature energy conversion and storage applications.
authors.affiliation: Department of Mechanical Engineering and Materials Science, Rice University, Houston, TX-77005, USA.
authors.forename: Raquel S
authors.initials: RS
authors.lastname: Borges
authors.forename: Arava Leela Mohana
authors.initials: AL
authors.lastname: Reddy
authors.forename: Marco-Tulio F
authors.initials: MT
authors.lastname: Rodrigues
authors.forename: Hemtej
authors.initials: H
authors.lastname: Gullapalli
authors.forename: Kaushik
authors.initials: K
authors.lastname: Balakrishnan
authors.forename: Glaura G
authors.initials: GG
authors.lastname: Silva
authors.forename: Pulickel M
authors.initials: PM
authors.lastname: Ajayan