State-of-the-art automotive fuel cells that operate at about 80 °C require large radiators and air intakes to avoid overheating. High-temperature above 100 under anhydrous conditions provide an ideal solution for heat rejection in heavy-duty vehicle applications. Here we report protonated phosphonic acid electrodes remarkably improve the performance of high-temperature polymer electrolyte membr...

In water electrolyzers, polymer electrolyte membranes (PEMs) such as Nafion can accumulate cations stemming from salt impurities in the supply, which leads to severe cell voltage increases. This combined experimental and computational study discusses influence of sodium ion poisoning on ionic conductivity transport a thereon based electrolysis cell. Conductivities aqueous solutions with same am...

In this work, cornstarch-based electrolytes are doped with ammonium bromide (NH4Br) and plasticized with glycerol. Starch-NH4Br complexation is evidenced from the Fourier transform infrared (FTIR) spectroscopy results. A room temperature conductivity of (5.57±1.88)×10 S cm obtained by 70wt% starch–30 wt% NH4Br electrolyte is enhanced to (1.80±0.26)×10 S cm with the addition of 30 wt% glycerol. ...

A simple method is reported for the preparation of self-assembling sulfonated graphene oxide membranes (SGO-X) to be studied as a potential proton conductor exchange membrane fuel cells (PEMFCs). The effect three different sulfuric acid-to-GO molar ratios investigated, main aim being identification an optimal sulfonation interval ensuring successful trade-off among composition, structural stabi...

Maximum Power Point (MPP) tracker has an important role in the performance of fuel cell (FC) systems improvement. Tow parameters which have effect on the Fuel cell output power are temperature and membrane water. So contents make the MPP change by with variations in each parameter. In this paper, a new maximum power point tracking (MPPT) method for Proton Exchange Membrane (PEM) fuel cell is pr...

Among various types of alternative energy devices, solid oxide fuel cells (SOFCs) operating at low temperatures (300-600°C) show the advantages for both stationary and mobile electricity production. Proton-conducting oxides as electrolyte materials play a critical role in low-temperature SOFCs (LT-SOFCs). This review summarizes progress proton-conducting electrolytes LT-SOFCs from to with empha...

A mixed proton–electron conducting perovskite was synthesized by liquid-citrate method and the corresponding membrane was prepared by pressing followed by sintering. The hydrogen permeability of BaCe0.9Yb0.1O3-δ was studied as a function of temperature and hydrogen partial pressure (PH2) gradient. Using 100% dry hydrogen at 1173 K, the hydrogen permeation rate of dense membranes (1.63 mm thick)...

Polymer electrolyte membrane fuel cells are considered one of the alternatives to fossil energy sources. The slow kinetics oxygen reduction reaction (ORR) at cathode and high price Pt-based catalysts remain key challenges for commercial viability proton exchange cells. However, their cost susceptibility poisoning severely limit use large-scale applications in Heteroatom-doped porous carbon has ...

A Pt-free cathode catalyst is necessary for proton-exchange membrane fuel cell (PEMFC) to enable the widespread use of these environmentally friendly energy conversion devices at affordable price. Herein, a pyrolyzed electrospun carbon nanofibre (CNF) prepared embedded with cobalt(II) phthalocyanine and iron(II) compounds provide transition metal N4-macrocyclic complex-derived sites (MNX) posse...