Effect of KOH concentration and anions on the performance of an NiH2 battery positive plate

Vaidyanathan, H.; Robbins, Kathleen M. B.; Rao, Gopalakrishna M.

doi:10.1016/s0378-7753(96)02435-4

Cited by 11 publications

(4 citation statements)

References 3 publications

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“…Previous studies of the effect of electrolyte composition (KOH and ZnO) on the rate of the parasitic hydrogen evolution reaction (HER), during zinc reduction, report that increasing KOH concentrations accelerate HER while increasing concentrations of Zn 2+ supress it [18,39]. Vaidyanathan et al have observed that increasing concentrations of KOH lead to improved nickel electrode discharge capacities [40]. In addition, Chen et al report that both discharge capacities and potentials of the nickel electrode increase with Zn 2+ content, attributing this to the stabilising effect of the intercalation of Zn 2+ ions to the nickel hydroxide lattice [41].…”

Section: Introductionmentioning

confidence: 99%

The effect of electrolyte and additive concentration on zinc–nickel flow cell performance

Trudgeon

2021

Electrochimica Acta

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Section: Introductionmentioning

confidence: 99%

The effect of electrolyte and additive concentration on zinc–nickel flow cell performance

Trudgeon

2021

Electrochimica Acta

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“…However, there are only a few studies of the modification of traditional KOH electrolytes to improve the cycle life of Ni/MH batteries. For example, Danczuk et al [15] and Karwowska et al [16] studied the effects of alkaline cation additives in KOH electrolyte to AB5 type alloys; Shangguan et al [17] found that Na2WO4 additives could increase the high temperature performance of Ni electrodes; Vaidyanathan et al [18] reported that KSiO4 and KNO3 additives could increase the end-of-charge voltage for Ni/MH batteries. Until now, very few studies for electrolyte additives' effects to MgNi-based Ni/MH batteries have been reported.…”

Section: Introductionmentioning

confidence: 99%

Effects of Salt Additives to the KOH Electrolyte Used in Ni/MH Batteries

Yan

Kim

2015

Batteries

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KOH-based electrolytes with different salt additives were investigated to reduce their corrosive nature toward Mg/Ni metal hydride alloys used as negative electrodes in nickel metal hydride (Ni/MH) batteries. Alkaline metal halide salts and oxyacid salts were studied as additives to the traditional KOH electrolyte with concentrations varying from 0.005 M to 1.77 M. Effects of the cations and anions of the additives on charge/discharge performance are discussed. The reduction potential of alkaline cations and radii of halogen anions were correlated with initial capacity and degradation of the metal hydride alloy. A synergistic effect between KOH and some oxyacid salt additives was observed and greatly influenced by the nature of the salt additives. It was suggested that both the formation of a solid film over the metal hydride surface and the promotion of proton transfer in the additives containing electrolytes led to a decreased degradation of the electrodes and an increased discharge capacity. 12 salt additives, NaC2H3O2, KC2H3O2, K2CO3, Rb2CO3, Cs2CO3, K3PO4, Na2WO4, Rb2SO4, Cs2SO4, NaF, KF, and KBr, were found to increase the corrosion resistance of the MgNi-based metal hydride alloy.

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“…In general, NaOH solutions have been used as the electrolyte for water splitting [6,10,12,13]. However, KOH solution is normally used in Ni-H 2 battery systems [14], because its high pH (e.g. over pH 10) facilitates the diffusion of hydroxyl ions and supports the reactions occurring at the photocatalyst.…”

Section: Effect Of Koh Concentration On O 2 Evolutionmentioning

confidence: 99%

“…The optimum pH seems to be determined by the competition between the influence of the concentration of OH − and the backward reaction (Eq. (2)) that takes place over the oxidation sites of the photocatalyst [10,13,14].…”

Section: Effect Of Koh Concentration On O 2 Evolutionmentioning

confidence: 99%

Photocatalytic production of oxygen in a dual bed system using a reversible redox mediator on Ir-TiO2 catalyst

Nam

Kim

Han

2008

Korean J. Chem. Eng.

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Photocatalytic O 2 evolution by water splitting in an alkaline solution with a redox mediator was investigated in a dual bed system configuration: one bed was used for oxygen evolution and the other for hydrogen evolution. The employed photocatalyst was Ir-TiO 2 and the iodate ion, KIO 3 , was used as a redox mediator. In order to find the optimum conditions for oxygen evolution, the effect of alkaline concentration, KIO 3 concentration and the amount of Ir loading on the photocatalytic reactivity was examined in an irradiation area of 0.055 m 2 reactor with a 400 W U.V. lamp. The experimentally obtained results showed that oxygen evolution depends on the concentration of the alkaline solution, the potassium iodate concentration and the amount of Ir loading.

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Effect of KOH concentration and anions on the performance of an NiH2 battery positive plate

Cited by 11 publications

References 3 publications

The effect of electrolyte and additive concentration on zinc–nickel flow cell performance

The effect of electrolyte and additive concentration on zinc–nickel flow cell performance

Effects of Salt Additives to the KOH Electrolyte Used in Ni/MH Batteries

Photocatalytic production of oxygen in a dual bed system using a reversible redox mediator on Ir-TiO2 catalyst

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