Development of an All Solid State Battery Incorporating Graphene Oxide as Proton Conductor

Yuta Shudo; Md Saidul Islam; Mohammad Razaul Karim; Nurun Nahar Rabin; Kosuke Wakata; Ryo Ohtani; Masaaki Nakamura; Leonard F Lindoy; Shinya Hayami

doi:10.1002/gch2.201700054

Development of an All Solid State Battery Incorporating Graphene Oxide as Proton Conductor

Glob Chall. 2017 Aug 1;1(6):1700054. doi: 10.1002/gch2.201700054. eCollection 2017 Sep 16.

Authors

Affiliations

¹ Department of Chemistry Graduate School of Science and Technology Kumamoto University 2-39-1 Kurokami Chuo-ku Kumamoto 860-8555 Japan.
² Department of Chemistry School of Physical Sciences Shahjalal University of Science and Technology Sylhet 3114 Bangladesh.
³ School of Chemistry The University of Sydney NSW 2006 Australia.
⁴ Institute of Pulsed Power Science (IPPS) Kumamoto University 2-39-1 Kurokami Chuo-ku Kumamoto 860-8555 Japan.

Abstract

Graphene oxide (GO) shows high proton conductivity (≈10^-4 Scm^-1), excellent mechanical stability, and electrical insulation property, which makes it an ideal candidate for use as a proton conducting solid state electrolyte. The prospects of using GO as single phase solid electrolyte in an all solid battery is presented herein. A battery with the cell configuration: Zn + ZnSO₄•7H₂O + graphite (anode) || GO (electrolyte) || MnO₂ + graphite (cathode) is fabricated. Cyclic voltammetry confirms its rechargeable nature. The respective discharge capacity and power density of the cell are 360 μAh and 19.5 mW kg^-1 at a constant current drain of 3 μA under the experimental conditions employed. GO based proton conductors are cleaner and cheaper than other solid electrolytes. The current study strongly suggests that GO can be used as a practical and beneficial component in solid state battery applications with low energy feedback.

Keywords: graphene oxide; solid electrolyte; solid state battery.