The influence of Co and various additives on the performance of MmNi4.3−xMn0.33Al0.4Cox hydrogen storage alloys and Ni/MH prismatic sealed cells

Study of the high temperature characteristics of hydrogen storage alloys

“…As for the commercial use of LaNi 5 -type hydrogen storage alloys, multi-component alloying is one of the most effective methods to adjust the properties. The effect of alloying element on the performance of hydrogen storage alloy has been of interest to many researches [4][5][6][7][8][9]. Ticianelli et al [10] studied the effect of Y as a substituent for La on the cycle life and charge/discharge reaction kinetics.…”

Effects of substituting Co with Fe on the microstructures and electrochemical characteristics of the as-cast and quenched Mm(NiMnSiAl)4.3Co0.6−xFex (x = 0–0.6) electrode alloys

“…Thus, researchers have naturally paid much attention on the decrease of Co content in the alloys [1][2][3][4][5][6][7][8][9]. Although researchers have done much work in preparing low-Co and Co-free hydrogen storage alloys around the world, the obtained results are still unsatisfactory [4][5][6][7]. The main problem is that the cycle stabilities of low-Co and Co-free AB 5 -type electrode alloys are very poor because the function of Co on the cycle stability of AB 5 -type hydrogen storage alloy is extremely important [10].…”

The cycle stabilities of the as-cast and quenched La2Mg(Ni0.85Co0.15)9Mx (M=B, Cr, Ti; x=0, 0.1) hydrogen storage alloys

“…The capacity decay of the alloy can partly be compensated by the power produced by the LaNi 2 phase. Similar to B, the addition of Cr and Ti increases the amount of the LaNi 2 phase, which is favourable for the cycle life of the alloys, moreover the addition of Cr can improve the anti-corrosion capability of the alloy [6,10,11]. Therefore, the addition of Cr increases the cycle life of the alloy.…”