Factors affecting the characteristics of the negative electrodes for nickel-hydrogen batteries

Electrochemical characteristics of amorphous MgTi x Ni (x = 0, 0.1, and 0.2) hydrogen storage alloys

“…The corrosion rate equation is where v is the corrosion rate, g·m −2 ·h −1 ; w is the molar mass of the active substance, g·mol −1 ; n is the number of transferred electrons; and F is the Faraday constant, C·mol −1 . It can be seen that corrosion rate is directly proportional to corrosion current density [17]. Therefore, Ti addition inhibits the corrosion rate of the alloys and enhances the anticorrosive performance of MgNi alloy, in agreement with the information of cyclic stability in Table 1.…”

Effects of annealing temperature on structure and the electrochemical properties of La0.7Mg0.3Ni2.45Co0.75Mn0.1Al0.2 hydrogen storage alloy

“…7 shows the anode polarization curves of the ascast and annealed La 0.7 Mg 0.3 Ni 2.45 Co 0.75 Mn 0.1 Al 0.2 hydrogen storage alloy electrodes at 50% DOD and 298 K. The anode polarization curves indicate the polarization is controlled by the mass-transfer of the hydrogen desorption process at high current densities. The limiting current density is an important parameter for the electrode [21] and can be related to the diffusion rate of the hydrogen in the hydrogen storage alloy [22]. The limiting current densities obtained from the anode polarization curves are listed in Table 3.…”

Hydrogen solubility and diffusion studies of Zr-based AB2 alloys and sol–gel encapsulated AB2 alloy particles

“…(3) Diffusion of hydrogen [6,7]. The properties of the NieMH battery depend on the composition of the metal hydride electrode, storage capacity, cyclic stability, preparation condition, particle size and also by the diffusion of hydrogen in alloys [8]. Since the hydrogen diffusion process controls the reactions taking place on the alloy surface, it must be a key factor to consider in determining the kinetic parameters of the MH electrode.…”