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Substrate integrated Lead-Carbon hybrid ultracapacitor with flooded, absorbent glass mat and silica-gel electrolyte configurations

Content Provider	Springer Nature Link
Author	RAVIKUMAR, M K KUMAR, P SURESH GAFFOOR, S A SHUKLA, A K
Copyright Year	2012
Abstract	Lead-Carbon hybrid ultracapacitors (Pb-C HUCs) with flooded, absorbent-glass-mat (AGM) and silica-gel sulphuric acid electrolyte configurations are developed and performance tested. Pb-C HUCs comprise substrate-integrated PbO$_{2}$ (SI-PbO$_{2}$) as positive electrodes and high surface-area carbon with graphite-sheet substrate as negative electrodes. The electrode and silica-gel electrolyte materials are characterized by XRD, XPS, SEM, TEM, Rheometry, BET surface area, and FTIR spectroscopy in conjunction with electrochemistry. Electrochemical performance of SI-PbO$_{2}$ and carbon electrodes is studied using cyclic voltammetry with constant-current charge and discharge techniques by assembling symmetric electrical-double-layer capacitors and hybrid Pb-C HUCs with a dynamic Pb(porous)/PbSO$_{4}$ reference electrode. The specific capacitance values for 2 V Pb-C HUCs are found to be 166 F/g, 102 F/g and 152 F/g with a faradaic efficiency of 98%, 92% and 88% for flooded, AGM and gel configurations, respectively. Graphical Abstract Substrate-integrated Lead–Carbon hybrid ultracapacitors are fabricated with varying electrolyte configurations, namely flooded, absorbent-glass-mat (AGM) and silica gel, and their performance tested. A cause and effect analysis of the various physical and electrical parameters pertaining to the aforesaid Lead-Carbon hybrid ultracapacitors is presented.
Starting Page	747
Ending Page	762
Page Count	16
File Format	PDF
ISSN	09743626
Journal	Journal of Chemical Sciences
Volume Number	124
Issue Number	4
e-ISSN	09737103
Language	English
Publisher	Springer-Verlag
Publisher Date	2012-08-14
Publisher Institution	Indian Academy of Sciences
Publisher Place	India
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Hybrid ultracapacitor substrate-integrated PbO$_{2}$ electrode silica-gel electrolyte Chemistry/Food Science
Content Type	Text
Resource Type	Article
Subject	Chemistry

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