Electrochemical performances of a Co-free La(NiMnAlFe)5 hydrogen storage alloy modified by surface coating with Cu

Influence of electroless coatings of Cu, Ni–P and Co–P on MmNi3.25Al0.35Mn0.25Co0.66 alloy used as anodes in Ni–MH batteries

“…A very small amount of Pd nanoparticles could activate the MH surface to facilitate the charge transfer process in hydrogen ion reduction. Also some studies [10,18] on effects of Ni and Cu coating of hydride-forming metal alloys on their performance as the cathode material of a Ni-MH cell have indicated that such coatings significantly improve the electrode rate capability and alloy activation time.…”

“…Various types of surface modifications [5][6][7][8][9] have been reported to improve the electrocatalytic nature of metal hydride electrodes. Surface modifications of metal hydride alloy particles by electroless plating with Cu, Ni-P, Ni-B, Pd and Co have shown improvement in cycle life and high rate capability [10][11][12][13]7].…”

“…Of late, Wei et al [10] reported that the effect of electroless Cu coating on AB 5 -type metal hydride alloy improves its activation capability. They also observed a decrease in charge transfer resistance and an …”

Effects of the mass ratio of carbonyl nickel powders to Mm0.3Ml0.7Ni3.55Co0.75Mn0.4Al0.3 alloy powders on the electrochemical properties of metal hydride electrodes

“…In fact, the types of conductive materials and the mass ratio of conductive material to hydrogen storage alloy in the electrodes are also of great importance to improve electrochemical properties and reduce the total weight and the cost of the negative electrodes. However, only a few researches have concentrated on the effects of the types of conductive material on the electrochemical properties of metal hydride electrodes [8][9][10][11][12]. Researches related to the mass ratio of conductive material to hydrogen storage alloy have been rarely reported before.…”

Study on the electrochemical properties of MgNi–CuO hydrogen storage composite materials

“…However, hydrogen storage with a safe, effective and cheap system is crucial for hydrogen cells or hydrogen-driven combustion engines [4]. In recent years, many hydrogen storage alloys, such as rare earth-based AB 5 -type alloys [5][6][7][8], Ti-or Zr-based AB 2 -type alloys [9], R-Mg-Ni-based (R = rare earth or Ca) AB 3 -type alloys [10][11][12][13], and Mg-based alloys [14,15], have been studied as negative electrode materials of rechargeable nickel-metal hydride (Ni-MH) batteries. Among the alloys mentioned above, Mg-based alloys are considered as a promising candidate for the negative material of Ni-MH batteries due to their high discharge capacity, low gravity and rich natural resources [16][17][18].…”