MnO2-polypyrrole conducting polymer composite electrodes for
electrochemical redox supercapacitors

S A Hashmi; Hari M Upadhyaya

doi:10.1007/BF02376079

MnO₂-polypyrrole conducting polymer composite electrodes for electrochemical redox supercapacitors

S A Hashmi, Hari M Upadhyaya

Research output: Contribution to journal › Article › peer-review

25 Citations (Scopus)

Abstract

Redox supercapacitors using electrochemically synthesised MnO2-polypyrrole composite electrodes have been fabricated with different electrolytes, namely polymer electrolyte film (polyvinyl alcohol, PVA-H3PO4 aqueous blend), aprotic liquid electrolyte (LiClO4-propylene carbonate, PC) and polymeric gel electrolyte [poly methyl methacrylate, (PMMA)-Ethylene carbonate (EC)-Propylene carbonate (PC)-NaClO4]. The capacitors have been characterised using galvanostatic charge-discharge methods. The cell with aqueous PVA-H3PO4 shows non-capacitive behaviour owing to some reversible chemical reaction of MnO2 with water while the MnO2-polypyrrole composite is found to be a suitable electrode material for redox supercapacitors with aprotic (non-aqueous) electrolytes. The solid state supercapacitor based on MnO2-polypyrrole composite electrodes with gel electrolyte gives stable values of capacitance of 10.0-18.0 mF cm(-2) for different discharge current densities.

Original language	English
Pages (from-to)	272-277
Number of pages	6
Journal	Ionics
Volume	8
Issue number	3-4
DOIs	https://doi.org/10.1007/BF02376079
Publication status	Published - 1 May 2002

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title = "MnO2-polypyrrole conducting polymer composite electrodes for electrochemical redox supercapacitors",

abstract = "Redox supercapacitors using electrochemically synthesised MnO2-polypyrrole composite electrodes have been fabricated with different electrolytes, namely polymer electrolyte film (polyvinyl alcohol, PVA-H3PO4 aqueous blend), aprotic liquid electrolyte (LiClO4-propylene carbonate, PC) and polymeric gel electrolyte [poly methyl methacrylate, (PMMA)-Ethylene carbonate (EC)-Propylene carbonate (PC)-NaClO4]. The capacitors have been characterised using galvanostatic charge-discharge methods. The cell with aqueous PVA-H3PO4 shows non-capacitive behaviour owing to some reversible chemical reaction of MnO2 with water while the MnO2-polypyrrole composite is found to be a suitable electrode material for redox supercapacitors with aprotic (non-aqueous) electrolytes. The solid state supercapacitor based on MnO2-polypyrrole composite electrodes with gel electrolyte gives stable values of capacitance of 10.0-18.0 mF cm(-2) for different discharge current densities.",

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doi = "10.1007/BF02376079",

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TY - JOUR

T1 - MnO2-polypyrrole conducting polymer composite electrodes for electrochemical redox supercapacitors

AU - Hashmi, S A

AU - Upadhyaya, Hari M

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N2 - Redox supercapacitors using electrochemically synthesised MnO2-polypyrrole composite electrodes have been fabricated with different electrolytes, namely polymer electrolyte film (polyvinyl alcohol, PVA-H3PO4 aqueous blend), aprotic liquid electrolyte (LiClO4-propylene carbonate, PC) and polymeric gel electrolyte [poly methyl methacrylate, (PMMA)-Ethylene carbonate (EC)-Propylene carbonate (PC)-NaClO4]. The capacitors have been characterised using galvanostatic charge-discharge methods. The cell with aqueous PVA-H3PO4 shows non-capacitive behaviour owing to some reversible chemical reaction of MnO2 with water while the MnO2-polypyrrole composite is found to be a suitable electrode material for redox supercapacitors with aprotic (non-aqueous) electrolytes. The solid state supercapacitor based on MnO2-polypyrrole composite electrodes with gel electrolyte gives stable values of capacitance of 10.0-18.0 mF cm(-2) for different discharge current densities.

AB - Redox supercapacitors using electrochemically synthesised MnO2-polypyrrole composite electrodes have been fabricated with different electrolytes, namely polymer electrolyte film (polyvinyl alcohol, PVA-H3PO4 aqueous blend), aprotic liquid electrolyte (LiClO4-propylene carbonate, PC) and polymeric gel electrolyte [poly methyl methacrylate, (PMMA)-Ethylene carbonate (EC)-Propylene carbonate (PC)-NaClO4]. The capacitors have been characterised using galvanostatic charge-discharge methods. The cell with aqueous PVA-H3PO4 shows non-capacitive behaviour owing to some reversible chemical reaction of MnO2 with water while the MnO2-polypyrrole composite is found to be a suitable electrode material for redox supercapacitors with aprotic (non-aqueous) electrolytes. The solid state supercapacitor based on MnO2-polypyrrole composite electrodes with gel electrolyte gives stable values of capacitance of 10.0-18.0 mF cm(-2) for different discharge current densities.

U2 - 10.1007/BF02376079

DO - 10.1007/BF02376079

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JO - Ionics

JF - Ionics

IS - 3-4

ER -

MnO2-polypyrrole conducting polymer composite electrodes for electrochemical redox supercapacitors

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MnO₂-polypyrrole conducting polymer composite electrodes for electrochemical redox supercapacitors