Shaik Abdul Gaffoor
Indian Institute of Science
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Publication
Featured researches published by Shaik Abdul Gaffoor.
Journal of Chemical Sciences | 2006
Surendra K. Martha; B. Hariprakash; Shaik Abdul Gaffoor; Dinesh Chandra Trivedi; A. K. Shukla
Lightweight grids for lead-acid battery grids have been prepared from acrylonitrile butadiene styrene (ABS) copolymer followed by coating with lead. Subsequently, the grids have been electrochemically coated with a conductive and corrosion-resistant layer of polyaniline. These grids are about 75% lighter than those employed in conventional lead-acid batteries. Commercial-grade 6V/3.5Ah (C20-rate) lead-acid batteries have been assembled and characterized employing positive and negative plates constituting these grids. The specific energy of such a lead-acid battery is about 50 Wh/kg. The batteries can withstand fast charge-discharge duty cycles.
Electrochemical and Solid State Letters | 2004
B. Hariprakash; Anil U. Mane; Surendra K. Martha; Shaik Abdul Gaffoor; S. A. Shivashankar; A.K. Shukla
Lightweight plastic grids for lead/acid battery plates have been prepared from acrylonitrile butadiene styrene copolymer. The grids have been coated with a conductive and corrosion-resistant tin oxide layer by a novel rapid thermally activated chemical reaction process. X-ray powder diffraction and X-ray photoelectron spectroscopy show the coated tin oxide film to be
Bulletin of Materials Science | 2003
Surendra K. Martha; B. Hariprakash; Shaik Abdul Gaffoor; A. K. Shukla
SnO_2
Journal of Chemical Sciences | 2012
Alakananda Banerjee; Musuwathi Krishnamoorthy Ravikumar; A. Jalajakshi; P Suresh Kumar; Shaik Abdul Gaffoor; A. K. Shukla
-like. The grids are about 75% lighter than conventional lead/acid battery grids. A 6 V/1 Ah lead/acid battery has been assembled and characterized employing positive and negative plates made from these grids. The energy density of such a lead/acid battery is believed to be more than 50 Wh/kg.
Electrochemical and Solid State Letters | 2005
Surendra K. Martha; B. Hariprakash; Shaik Abdul Gaffoor; Dinesh Chandra Trivedi; A. K. Shukla
Abstract12 V/25 AH gelled- electrolyte valve- regulated lead- acid batteries have been assembled in- house and their performance studied in relation to the absorptive glass- microfibre valve- regulated and flooded-electrolyte counterparts at various discharge rates and temperatures between -40†C and 40†C. Although the performance of the gelled- electrolyte valve- regulated battery is similar to both the absorptive glass- microfibre valve- regulated and flooded- electrolyte lead- acid batteries at temperatures above 0†C, it is superior to both the flooded- electrolyte and absorptive glass- microfibre valve- regulated lead- acid batteries at temperatures between 0†C and -40†C. The latter characteristic is attractive for expanding the application regime of valve-regulated lead- acid batteries. The corrosion rate for the positive grids in the gelled- electrolyte is also lower than both the flooded- electrolyte and absorptive glass- microfibre configurations.
Meeting Abstracts | 2012
Anjan K. Banerjee; Musuwathi Krishnamoorthy Ravikumar; Amulur Jalajakshi; Shaik Abdul Gaffoor; Ashok Kumar Shukla
AbstractLead-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 PbO2 (SI-PbO2) 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-PbO2 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)/PbSO4 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 AbstractSubstrate-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.
Journal of Power Sources | 2005
Surendra K. Martha; B. Hariprakash; Shaik Abdul Gaffoor; S. Ambalavanan; A.K. Shukla
A novel room-temperature route to corrosion protect lead-coated plastic grids with an organic metal, namely, polyaniline, for producing commercial-grade high specific-energy 12 V/45 Ah lead-acid batteries is reported. The specific energy of these lead-acid batteries is found to be ca. 45 Wh/kg as against about 30 Wh/kg for conventional lead-acid batteries. It is believed that the study reported here will open up a new realm of possibilities for lead-acid battery development, and will contribute directly towards lowering the cost of both battery materials and manufacturing.
Archive | 2003
S. A. Shivashankar; A. K. Shukla; Anil U. Mane; B. Hariprakash; Shaik Abdul Gaffoor
A 12 V Substrate-Integrated PbO2-Activated Carbon hybrid ultracapacitor (SI-PbO2-AC HUCs) with silica-gel sulfuric acid electrolyte is developed and performance tested. The performance of the silica-gel based hybrid ultracapacitor is compared with flooded and AGM-based HUCs. These HUCs comprise substrate-integrated PbO2 (SI-PbO2) as positive electrodes and high surface-area activated carbon with dense graphite-sheet substrate as negative electrodes. 12 V SI-PbO2-AC HUCs with flooded, AGM and gel electrolytes are found to have capacitance values of 308 F, 184 F, and 269 F at C-rate and can be pulse charged and discharged for 100,000 cycles with only a nominal decrease in their capacitance values. The best performance is exhibited by gel-electrolyte HUCs.
Journal of Applied Electrochemistry | 2006
Surendra K. Martha; B. Hariprakash; Shaik Abdul Gaffoor; A.K. Shukla
Journal of Applied Electrochemistry | 2004
B. Hariprakash; Anil U. Mane; Surendra K. Martha; Shaik Abdul Gaffoor; S. A. Shivashankar; A.K. Shukla