Hydrogel membrane electrolyte for electrochemical capacitors

Polymer electrolytes are known to possess excellent physicochemical properties that are very useful for electrochemical energy systems. The mobility in polymer electrolytes is understood to be mainly due to the segmental motion of polymer chains and the ion transport is generally restricted to the amorphous phase of the polymer. Gel polymer electrolytes (GPE) that are formed using plastizicers and polymers along with ionic salts are known to exhibit liquid-like ionic conductivity while maintaining the dimensional stability of a solid matrix. In the present study, the preparation and characterization of poly(vinyl alcohol)-based hydrogel membranes (PHMEs) as electrolytes for electrochemical capacitors have been reported. Varying HClO4 dopant concentration leads to different characteristics of the capacitors. The EC comprising PHME doped with 2 M HClO4 and black pearl carbon (BPC) electrodes has been found to exhibit a maximum specific capacitance value of 97 F g−1, a phase angle value of 78°, and a maximum charge-discharge coulombic efficiency of 88%.

[1]  Hiroshi Inoue,et al.  New Electric Double Layer Capacitor with Polymer Hydrogel Electrolyte , 2003 .

[2]  B. Popov,et al.  Studies on Co-based catalysts supported on modified carbon substrates for PEMFC cathodes , 2006 .

[3]  K. Abraham,et al.  Li Ion Conductive Electrolytes Based on Poly(vinyl chloride) , 1993 .

[4]  P. Taberna,et al.  Electrochemical Characteristics and Impedance Spectroscopy Studies of Carbon-Carbon Supercapacitors , 2003 .

[5]  Prem N. Gupta,et al.  Characterization of H3PO4 based PVA complex system , 1996 .

[6]  Hiroshi Inoue,et al.  Electrochemical characteristics of electric double layer capacitor using sulfonated polypropylene separator impregnated with polymer hydrogel electrolyte , 2004 .

[7]  S. Pitchumani,et al.  Cross-linked polymer hydrogel electrolytes for electrochemical capacitors , 2006 .

[8]  G. Pistoia,et al.  Lithium batteries : new materials, developments, and perspectives , 1994 .

[9]  Peter V. Wright,et al.  Electrical conductivity in ionic complexes of poly(ethylene oxide) , 1975 .

[10]  W. Heineman,et al.  Evaluation of the Electrochemical Characteristics of a Poly(vinyl alcohol)/poly(acrylic acid) Polymer Blend , 1998 .

[11]  G. Feuillade,et al.  Ion-conductive macromolecular gels and membranes for solid lithium cells , 1975 .

[12]  W. Liang,et al.  Solid polymer electrolytes V: microstructure and ionic conductivity of epoxide-crosslinked polyether networks doped with LiClO4 , 2003 .

[13]  Heungsoo Shin,et al.  Properties of electroresponsive poly(vinyl alcohol)/poly(acrylic acid) IPN hydrogels under an electric stimulus , 1999 .

[14]  服部 武志.  第2回固体電解質に関する国際会議(Second International Meeting on Solid Electrolytes)に出席して , 1979 .

[15]  H. Inoue,et al.  Electrochemical characteristics of new electric double layer capacitor with acidic polymer hydrogel electrolyte , 2006 .

[16]  P. V. Wright,et al.  Complexes of alkali metal ions with poly(ethylene oxide) , 1973 .

[17]  W. Yonggang,et al.  Preparation and electrochemical capacitance of RuO2/TiO2 nanotubes composites , 2004 .

[18]  Nae-Lih Wu,et al.  Manganese oxide electrochemical capacitor with potassium poly(acrylate) hydrogel electrolyte , 2008 .

[19]  R. Savinell,et al.  Heat‐Treated Iron(III) Tetramethoxyphenyl Porphyrin Supported on High‐Area Carbon as an Electrocatalyst for Oxygen Reduction I. Characterization of the Electrocatalyst , 1998 .

[20]  D. Abraham,et al.  Rheological characterization of blends of low density with linear low density polyethylene using a torque rheometer , 1990 .

[21]  M. Morita,et al.  Electrochemical characterization of new electric double layer capacitor with polymer hydrogel electrolyte , 2003 .

[22]  N. Peppas,et al.  Hydrogels in Pharmaceutical Formulations , 1999 .

[23]  B. Conway.  Electrochemical Supercapacitors: Scientific Fundamentals and Technological Applications , 1999 .

[24]  Y. Lee,et al.  Aging effect of poly(vinyl alcohol) membranes crosslinked with poly(acrylic acid-co-maleic acid) , 2005 .

[25]  F. M. Gray,et al.  Solid Polymer Electrolytes , 1991 .

[26]  N. Kuwata,et al.  Conductivity and thermal studies of blend polymer electrolytes based on PVAc-PMMA , 2006 .

[27]  R. Vargas,et al.  More thermal studies on the PVOH/H3PO2/H2O solid proton conductor gels , 2001 .

[28]  T. Nagatomo,et al.  All‐Plastic Batteries with Polyacetylene Electrodes , 1987 .

[29]  Andrzej Lewandowski,et al.  Novel poly(vinyl alcohol)–KOH–H2O alkaline polymer electrolyte , 2000 .

[30]  Andrzej Lewandowski,et al.  Supercapacitor based on activated carbon and polyethylene oxide–KOH–H2O polymer electrolyte , 2001 .