Abstract: The invention relates to a starved metal hydride battery. The battery is characterized in that the battery further comprises adding of oxygen gas or hydrogen gas or hydrogen peroxide or a combination thereof in order to rebalance the electrodes and replenish the electrolyte by reactions with the electrode materials.

Abstract: The present disclosure concerns a method of producing an activated negative electrode powder for use in nickel-metal hydride (NiMH) batteries, the method comprising the steps: a) providing at least one previously cycled NiMH battery; b) isolating a negative electrode powder from the previously cycled NiMH battery; c) wet-milling or milling the negative electrode powder, thereby obtaining a mixture of the activated negative electrode powder and a byproduct rich in rare earth hydroxides; and d) separating the activated negative electrode powder from the byproduct. The disclosure further relates to an activated negative electrode powder produced by the said method, as well as battery electrodes and batteries comprising such a powder.

Abstract: The invention relates to a starved metal hydride battery. The battery is characterized in that the battery further comprises adding of oxygen gas or hydrogen gas or hydrogen peroxide or a combination thereof in order to rebalance the electrodes and replenish the electrolyte by reactions with the electrode materials.

Abstract: The invention relates to a starved metal hydride battery. The battery is characterized in that the battery further comprises added oxygen gas or hydrogen gas or hydrogen peroxide or a combination thereof in order to rebalance the electrodes and replenish the electrolyte by reactions with the electrode materials.

Abstract: The invention relates to a starved metal hydride battery. The battery is characterized in that the battery further comprises added oxygen gas or hydrogen gas or hydrogen peroxide or a combination thereof in order to rebalance the electrodes and replenish the electrolyte by reactions with the electrode materials.

Abstract: The invention concerns a method of improving the properties of a hydrogen storage alloy powder for a negative electrode of a rechargeable nickel hydride battery. The method comprises the steps of hydriding a powdered alloy starting material, oxidizing the obtained hydride alloy powder and washing the oxidized powder. The invention also concerns the obtained powder.

Abstract: The invention concerns a method of improving the properties of a hydrogen storage alloy powder for a negative electrode of a rechargeable nickel hydride battery. The method comprises the steps of hydriding a powdered alloy starting material, oxidising the obtained hydride alloy powder and washing the oxidised powder. The invention also concerns the obtained powder.