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A three-dimensional, steady-state mathematical model is described to investigate the fluid flow, species transport and electrochemical reaction in the PEM fuel cells with conventional and interdigitated flow fields. The multidimensional characteristics of flow, species and current distributions...
Mixed silicon–graphite composites were studied as an anode material for LIB. Estimation of the capacity of the composite as a function of silicon mass fraction as well as the lithium mole fraction in the final Li–Si alloy was performed. Based on this estimation, appropriate cycling test was...
The mechanisms for improved mechanical and electrical properties of an injection molded, carbon nanotubes (CNTs) filled, polyethylene terephthalate (PET)/polyvinylidene fluoride (PVDF) blend have been investigated. It is found that the improved properties are due to the formation of a...
This work reports an improved electrocatalytic activity for methanol oxidation at Pt–Ru–W electrode sputter deposited on Au substrate. The performance of Pt–Ru–W was compared with that of Pt–W and of Pt–Ru alloy electrodes. All the alloys tested exhibited catalytic activity higher...
The CO 2 poisoning effect on anodes for the proton-exchange-membrane fuel cell (PEMFC) was examined by model studies. It was assumed that the reverse water gas shift reaction (RWGS) is the origin of the CO 2 poisoning effects. The relation between the anode polarisation losses and the catalytic...
A series of microfuel cell DMFC prototypes in the 1–2 W range has been developed at Motorola Labs. Design criteria, technical issues and the solution to those issues, system and component performance criteria are all discussed in detail with regards to the demonstrated systems. In particular,...
Prospective positive-electrode (cathode) materials for a lithium secondary battery, viz., LiNi 0.8 Co 0.2− x Al x O 2 ( x = 0.00, 0.01, 0.03, and 0.05), were synthesized using a sol–gel method and the structural and electrochemical properties are examined by means of X-ray diffraction, cyclic...
The effects of pulse charging technique on inner pressure and cycling characteristics of sealed Ni/MH batteries were investigated by comparison with the conventional direct current (DC) charging. The electrochemical impedance spectroscopy of cycled Ni/MH batteries have been measured. The...
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