journal article·2023-08-09

Inorganic–Organic Double Network Ionogels Based on Silica Nanoparticles for High-Temperature Flexible Supercapacitors

Jeong Hee Park, Harpalsinh H. Rana, Jun Su Kim, Jung Woo Hong, Sang Jun Lee, Ho Seok Park

ACS Applied Materials & Interfaces· Volume 15· Issue 31
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Abstract

Herein, we demonstrate an inorganic–organic double network gel electrolyte consisting of a silica particle network and a poly-2-hydroxyethyl methacrylate network in which 1-butyl-3-methylimidazolium tetrafluoroborate ionic liquids are confined. The as-synthesized double network ionogel electrolytes exhibited high ion conductivity of 3.8 to 12.8 mS cm –1 over a wide temperature range of 30 to 150 °C and mechanical integrity with a maximum toughness of 1.8 MJ m –3 at 30 °C. These remarkable properties of the ionogel were associated with the formation of an optimal physical network of the silica nanoparticles in the colloidal dispersion. Accordingly, a flexible supercapacitor using ionogel electrolytes and reduced graphene oxide electrodes delivered energy and power densities of 48 Wh kg –1 and 4 kW kg –1, respectively, even at a high temperature of 120 °C, demonstrating excellent long-term stability that retains 93% of the initial capacitance even over 10,000 charge/discharge cycles at 120 °C.
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Research context

OpenAlex topics: Supercapacitor Materials and Fabrication · Advanced battery technologies research · Advanced Battery Materials and Technologies

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Chemical Engineering, Sungkyunkwan University, 2066, Seoburo, Jangan-gu, Suwon 440-746, Republic of Korea

Laboratory of Electrochemistry and Physicochemistry of Materials & Interfaces (LEPMI), CNRS/Grenoble-INP/UGA 1130, Rue de la Piscine, 38402 Saint-Martin d’Heres Cedex, France

SKKU Institute of Energy Science and Technology (SIEST), Sungkyunkwan University, 2066, Seoburo, Jangan-gu, Suwon 440-746, Republic of Korea

SKKU Advanced Institute of Nano Technology (SAINT), Sungkyunkwan University, 2066, Seoburo, Jangan-gu, Suwon 440-746, Republic of Korea

Department of Health Sciences and Technology, Samsung Advanced Institute for Health Sciences and Technology (SAIHST), Sungkyunkwan University, Suwon 16419, Republic of Korea

Funding

National Research Foundation of Korea

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