A new redox phloroglucinol additive incorporated gel polymer electrolyte for flexible symmetrical solid-state supercapacitors

Phuoc Anh Le, Van Truong Nguyen, Po Jen Yen, Tseung-Yuen Tseng*, Kung-Hwa Wei

*Corresponding author for this work

Research output: Contribution to journalArticle

6 Scopus citations

Abstract

We reported a new and environmentally friendly phloroglucinol additive incorporated polyvinyl alcohol-LiClO4 gel polymer electrolyte for flexible symmetrical solid-state supercapacitors. The incorporation of 10 wt% phloroglucinol into PVA-LiClO4 gel polymer electrolytes results in much higher specific capacitance (114 F g-1) than that without phloroglucinol (60 F g-1), an increase of 90%, because of the redox reaction of phloroglucinol in the system. We used the PVA-LiClO4 with 10 wt% phloroglucinol as a gel polymer electrolyte in combination with nitrogen-doped graphene nanosheet-based electrodes as the anode and cathode to fabricate a symmetrical solid-state supercapacitor. The fabricated supercapacitor involving the phloroglucinol redox additive has an energy density of 2.3 W h kg-1 at a power density of 150 W kg-1, which is higher than the one without a redox additive (1.9 W h kg-1 at a power density of 150 W kg-1). Moreover, the supercapacitor involving the redox additive has good stability; its capacitance remains at up to ∼94% after 5000 charge/discharge cycles.

Original languageEnglish
Pages (from-to)1536-1544
Number of pages9
JournalSustainable Energy and Fuels
Volume3
Issue number6
DOIs
StatePublished - 1 Jan 2019

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