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✦   LIBER   ✦

Conducting polymer-based electrochemical redox supercapacitors using proton and lithium ion conducting polymer electrolytes

✍ Scribed by Hashmi, S. A.; Latham, R. J.; Linford, R. G.; Schlindwein, W. S.

Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
226 KB
Volume
47
Category
Article
ISSN
0959-8103

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✦ Synopsis

Polypyrrole-based solid-state redox supercapacitors have been constructed using proton and lithium ion conducting polymer electrolytes : poly(vinyl alcohol) and poly(ethylene oxide) (PVA)ÈH 3 PO 4 , (PEO)ÈLiCF 3 SO 3 plasticized with poly(ethylene glycol) (PEG). The capacitors have been characterized using a.c. impedance, cyclic linear sweep voltammetry and galvanostatic chargeÈdischarge methods. Redox capacitors based on polypyrrole show large values of capacitance (about 1É5È5É0 mF cm~2) (equivalent to a single electrode capacitance of 40È84 F g~1 of polypyrrole) for both the electrolytes. The values of capacitance have been found to be stable up to 1000 chargeÈdischarge cycles between 0 and 1É0 V.

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