Microwave-exfoliated Graphene Oxide for High Voltage “Water-in-Salt” Electrolyte-based Supercapacitor

Exfoliated and reduced graphene oxide (MEGO) was fabricated by rapid microwave irradiation. When MEGO was used as the electrode of 17 m NaClO4 “water-in-salt” (WIS) electrolyte-based supercapacitors, the cell exhibited stable double layer capacitant behavior up to 2.5 V, much higher than the electro...

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Bibliographic Details
Published in:Chemistry letters 2022-03, Vol.51 (3), p.264-268
Main Authors: Yu, Sangho, Sano, Hideaki, Zheng, Guobin, Tanabe, Shuji
Format: Article
Language:English
Subjects:
Electrolytes
Flux density
Graphene
Sodium perchlorate
Supercapacitors
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Summary:Exfoliated and reduced graphene oxide (MEGO) was fabricated by rapid microwave irradiation. When MEGO was used as the electrode of 17 m NaClO4 “water-in-salt” (WIS) electrolyte-based supercapacitors, the cell exhibited stable double layer capacitant behavior up to 2.5 V, much higher than the electrochemical stable window of water. The MEGO exhibited high energy density of 22 Wh/kg at a power density of 12.5 kW/kg, attributable to fast motion of ion clusters in the large space of exfoliated nanosheets in MEGO.
ISSN:0366-7022
1348-0715
DOI:10.1246/cl.210657