Effect of different gel electrolytes on graphene-based solid-state supercapacitors

Qiao Chen; Xinming Li; Xiaobei Zang; Yachang Cao; Yijia He; Peixu Li; Kunlin Wang; Jinquan Wei; Dehai Wu; Hongwei Zhu

doi:10.1039/C4RA05553E

Effect of different gel electrolytes on graphene-based solid-state supercapacitors†

Qiao Chen,^ab Xinming Li,^c Xiaobei Zang,^a Yachang Cao,

^a Yijia He,

^ab Peixu Li,^d Kunlin Wang,^a Jinquan Wei,^a Dehai Wu^d and Hongwei Zhu*^ab

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* Corresponding authors

^a School of Materials Science and Engineering, State Key Laboratory of New Ceramics and Fine Processing, Tsinghua University, Beijing 100084, China
E-mail: hongweizhu@tsinghua.edu.cn

^b Center for Nano and Micro Mechanics, Tsinghua University, Beijing 100084, China

^c National Center for Nanoscience and Technology, Zhongguancun, Beijing 100190, China

^d Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China

Abstract

A solid-state supercapacitor with a flexible, simple structure based on graphene thin film electrodes and acid/base/salt–PVA gel electrolytes is reported. The performance of six different gel electrolytes (H₃PO₄, H₂SO₄, KOH, NaOH, KCl, NaCl) in this graphene-based supercapacitor are investigated. The electrochemical properties of this highly flexible, stable supercapacitor are enhanced by optimizing the concentration of the electrolyte in polymer gel.

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Effect of different gel electrolytes on graphene-based solid-state supercapacitors†

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Effect of different gel electrolytes on graphene-based solid-state supercapacitors

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