GasHub Technology Pte Ltd

Singapore, Singapore

GasHub Technology Pte Ltd

Singapore, Singapore
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Pethaiah S.S.,GasHub Technology Pte Ltd | Kumar J.A.,GasHub Technology Pte Ltd | Kalyani P.,Thiagarajar College of Engineering
Ionics | Year: 2011

The discharge capacity of zinc-carbon cells (Leclanche cell) is limited by the performance of the cathode material (MnO2) and physical properties of carbon powder added to MnO2. Acetylene black, Vulcan XC 72, Black Pearls 2000, and a carbon composite (consisting of 50% acetylene black and 50% Black Pearls 2000®) were evaluated as cathode additives in test cells and were compared. The study indicated that cathode mixture with Black Pearls 2000®showed improvement in performance than acetylene black, the most commonly used carbon in commercial zinc-carbon cells. The performance of the test cells was found to have a correlation with the physical properties of the carbons used. © 2011 Springer-Verlag.


Pethaiah S.S.,Gashub Technology Pte Ltd | Pethaiah S.S.,Alagappa University | Kalaignan G.P.,Alagappa University | Sasikumar G.,Sri Venkateswara College of Engineering | Ulaganathan M.,Zeca Powers Pte Ltd
Solid State Ionics | Year: 2011

In this paper we have evaluated the platinum catalyzed Membrane Electrode Assembly (MEA) by non-equilibrium impregnation reduction method for polymer electrolyte membrane fuel cell applications. The electrochemical and physical properties of the platinum catalyzed MEA have been examined using various characterization techniques such as cyclic Voltammetry, polarization, Scanning electron microscopy analysis and X-ray diffraction studies. The results demonstrate that the platinum catalyzed MEA exhibits significantly better electro catalytic activity and catalyst utilization than the normal MEA. A single cell with the platinum catalyzed MEA exhibits a maximum power density of 0.724 Wcm- 2 at a cell voltage of 0.6 V using H2/O 2 as a fuel. © 2011 Elsevier B.V. All rights reserved.


Pethaiah S.S.,Gashub Technology Pte Ltd | Pethaiah S.S.,Alagappa University | Kalaignan G.P.,Alagappa University | Ulaganathan M.,Gashub Technology Pte Ltd | And 2 more authors.
Ionics | Year: 2011

Novel nanocatalyzed membrane electrode assembly (MEA) with high performance and durability for polymer electrolyte membrane fuel cell application is prepared by modifying nonequilibrium impregnation-reduction method. The electrochemical and physical properties of nanocatalyzed MEA have been examined using various techniques such as cyclic voltammetry, impedance spectroscopy, scanning electron microscopy, and X-ray diffraction studies. The lifetime of the nanocatalyzed MEA is studied and compared with that of the conventional one. It is observed that the performance and durability of nanocatalyzed MEA are better than the conventional one. In addition, the influence of supported carbon corrosion in MEA durability has been studied. © 2011 Springer-Verlag.


Ulaganathan M.,Alagappa University | Ulaganathan M.,ZECA Power Pte Ltd | Pethaiah S.S.,Gashub Technology Pte Ltd | Rajendran S.,Alagappa University
Materials Chemistry and Physics | Year: 2011

The present work describes the Li-ion conduction in Poly(vinyl acetate) (PVAc) based polymer blend electrolytes have been synthesized by solvent casting technique for lithium battery applications. Characterization by XRD, SEM, AFM, FTIR, TG/DTA and photoluminescence was performed for synthesized polymer electrolytes. The thermal behaviour of the samples was ascertained from differential scanning calorimeter (DSC) and TG/DTA. The temperature dependence of conductivity of the polymer electrolytes was measured and the maximum ionic conductivity of 0.5269 × 10 -4 Scm -1 at 303 K for PVAc:PVdF-co-HFP ((25/75) wt%):LiClO 4 (8 wt%) complex. Surface morphology was examined from various surface scanning techniques such as scanning electron microscope (SEM) and atomic force microscope (AFM). Photoluminescence measurements demonstrated that the PVAc based polymer blend electrolyte shows minimum intensity and the results are detailed in this paper. © 2011 Elsevier B.V.

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