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Gel Electrolyte Derived from Poly(ethylene glycol) Blending Poly(acrylonitrile) Applicable to Roll‐to‐Roll Assembly of Electric Double Layer Capacitors
Author(s) -
Huang ChengWei,
Wu ChingAn,
Hou ShengShu,
Kuo PingLin,
Hsieh ChienTe,
Teng Hsisheng
Publication year - 2012
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201201342
Subject(s) - materials science , electrolyte , ethylene glycol , electric double layer capacitor , capacitance , chemical engineering , acrylonitrile , ionic conductivity , copolymer , polymer chemistry , equivalent series resistance , supercapacitor , composite material , electrode , polymer , voltage , chemistry , electrical engineering , engineering
The synthesis of a gelled polymer electrolyte (GPE) using poly(ethylene glycol) blending poly(acrylonitrile) (i.e., PAN‐ b ‐PEG‐ b ‐PAN) as a host, dimethyl formamide (DMF) as a plasticizer and LiClO 4 as an electrolytic salt for electric double layer capacitors (EDLCs) is reported. The PAN‐ b ‐PEG‐ b ‐PAN copolymer in the GPE has a linear configuration for high ionic conductivity and excellent compatibility with carbon electrodes. When assembling the GPE in a carbon‐based symmetric EDLC, the copolymer network facilitates ion motion by reducing the equivalent series resistance and Warburg resistance of the capacitor. This symmetric cell has a capacitance value of 101 F g −1 at 0.125 A g −1 and can deliver an energy level of 11.5 Wh kg −1 at a high power of 10 000 W kg −1 over a voltage window of 2.1 V. This cell shows superior stability, with little decay of specific capacitance after 30 000 galvanostatic charge‐discharge cycles. The distinctive merit of the GPE film is its adjustable mechanical integrity, which makes the roll‐to‐roll assembly of GPE‐based EDLCs readily scalable to industrial levels.