Cross-Linked Polymer Hydrogel Electrolytes for Electrochemical Capacitors | Zendy

Nurul Alam Choudhury | Zendy; A. K. Shukla | Zendy; S. Sampath | Zendy; S. Pitchumani | Zendy

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Cross-Linked Polymer Hydrogel Electrolytes for Electrochemical Capacitors

Author(s) -

Nurul Alam Choudhury,

A. K. Shukla,

S. Sampath,

S. Pitchumani

Publication year - 2006

Publication title -

journal of the electrochemical society

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.258

H-Index - 271

eISSN - 1945-7111

pISSN - 0013-4651

DOI - 10.1149/1.2164810

Subject(s) - polyvinyl alcohol , materials science , electrolyte , polyacrylic acid , differential scanning calorimetry , chemical engineering , chemistry , polymer , composite material , electrode , physics , engineering , thermodynamics

Acidic polyvinyl alcohol/polyacrylic acid blend hydrogel electrolytes (BHEs) were prepared by cross-linking with glutaraldehyde and perchloric acid. These acidic BHEs were treated suitably to realize alkaline and neutral BHEs. Amorphicity of BHEs was followed by differential scanning calorimetry. Ionic conduction in acidic BHEs was found to take place by a Grotthus-type mechanism whereas in alkaline and neutral BHEs it was due to a segmental motion mechanism. Ionic conductivity of BHEs was found to range between 10(-3) and 10(-2) S cm(-1). Electrochemical capacitors assembled with acidic polyvinyl alcoholhydrogel electrolyte yielded a maximum capacitance of similar to 60 and 1000 F g(-1) with BP carbon and RuO(x)center dot xH(2)O/C electrodes, respectively.

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