Roles of gel polymer electrolytes for high-power activated carbon supercapacitors: Ion reservoir and binder-like effects

Habin Park, Jaewon Chung, Hansol Yong, Jongwon Jung, Cheolsoo Jung

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

Ion reservoir and binder-like effects of gel polymer electrolytes (GPEs) are suggested for working mechanisms to enhance rate capability and cycling stability of activated carbon (AC) supercapacitors (SCs) even at 3.4 V. Analysis on kinetics from cyclic voltammetry, electrochemical reactions through in situ Fourier-transform infrared spectroscopy, and differential information of galvanostatic curves reveals that the increased rate-capability is derived dominantly by an improved non-faradaic process by the ion reservoir effect of GPEs in the AC. Although the designed GPEs induce slightly higher bulk and diffusion resistance at the incipient stage, the GPEs play a binder-like function to suppress detachment of AC particles and aggravation of impedance parameters during cycling at 3.4 V.

Original languageEnglish
Pages (from-to)4690-4697
Number of pages8
JournalRSC Advances
Volume10
Issue number8
DOIs
StatePublished - 2020

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