The effect of particle size on the electrode performance of Ti–V-based hydrogen storage alloys

Pressure–composition–temperature hysteresis in C14 Laves phase alloys: Part 3. Empirical formula

“…Studies in the pulverization of various MH electrode materials were performed on AB2 [5][6][7][8][9][10], AB5 [1,[11][12][13][14], A2B7 [15], V-based BCC [16], and Mg-Ni based AB materials [17]. On the newly pulverized surface, either: (1) protective layers of La(OH) 3 and/or Mg(OH) 2 formed which impeded hydrogen transportation [13,15,[18][19][20] or (2) soluble ions such as HZrO 3 2− , HTiO 3 2− , HMnO 2 − , HV 2 O 5 − formed [6,7,[21][22][23] which increased the self-discharge rate of the battery [5].…”

Electrochemical behavior of metal hydride electrode with different particle size

“…Nomenclature a a Active area per electrode unit volume a r Interfacial area per unit volume A p Electrode geometric area AB 5 Hydride forming alloy AB 2 Hydride Greek letters k Effective electrolyte conductivity u Angular frequency G Maximum surface concentration of H ad i n t e r n a t i o n a l j o u r n a l o f h y d r o g e n e n e r g y 3 7 ( 2 0 1 2 ) 1 4 9 6 6 e1 4 9 7 1…”

“…Due to expansion/contraction during charge/discharge cycles, the hydrogen storage alloys suffer continuous pulverization, thus the alloy particle size decreases showing a new surface for the hydriding process. However, the increase of the surface accelerates the oxidation of the alloy and therefore accelerates the degradation of the electrodes [2]. The literature shows that there is a narrow relationship between particle size and electrochemical properties of hydrogen storage alloys of different kinds [2e5].…”

Study of AB2 alloy electrodes for Ni/MH battery prepared by centrifugal casting and gas atomization

“…However, AB 2 alloy made by conventional melt-and-cast (MC) process is difficult to activate and its cycle life is inferior [8,[26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42][43][44][45]. Various manufacturing processes have been tried before to improve the battery performance using AB 2 electrode [18,[46][47][48][49][50][51][52][53][54].…”