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Hyrogen occluding alloy powder and method for surface treatment of same, negative pole for an alkali storage battery, and alkali storage battery

A hydrogen storage alloy and surface treatment technology, applied in the direction of alkaline storage battery, battery electrode, nickel storage battery, etc., can solve the problems of quality fluctuation and productivity reduction, and achieve the effect of full activation and excellent low-temperature discharge characteristics

Inactive Publication Date: 2010-08-18
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, charging and discharging for activation after assembling the battery takes a corresponding amount of time
Moreover, fluctuations in quality are likely to occur, resulting in a decrease in productivity

Method used

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  • Hyrogen occluding alloy powder and method for surface treatment of same, negative pole for an alkali storage battery, and alkali storage battery
  • Hyrogen occluding alloy powder and method for surface treatment of same, negative pole for an alkali storage battery, and alkali storage battery
  • Hyrogen occluding alloy powder and method for surface treatment of same, negative pole for an alkali storage battery, and alkali storage battery

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Abstract

Provided is a hydrogen occluding alloy powder having an ideally activated surface state where oxide and hydroxide precipitated on the surface of said powder have been removed quickly with a simple means. The method for surface treating a hydrogen occluding alloy powder involves agitating a hydrogen occluding alloy powder containing Ni and Mg with an Ni content from 35 to 60 wt% in a lithium hydroxide aqueous solution (first process). Then the hydrogen occluding alloy powder is agitated in an alkali metal hydroxide aqueous solution containing at least either one of sodium hydroxide and potassium hydroxide (second process).

Description

technical field The present invention relates to a surface treatment method of a hydrogen storage alloy powder capable of electrochemically intercalating and deintercalating hydrogen, and more specifically, relates to improvement of surface treatment conditions of a hydrogen storage alloy powder. The present invention also relates to a negative electrode for an alkaline storage battery containing hydrogen storage alloy powder, and an alkaline storage battery including the negative electrode. Background technique The hydrogen storage alloy powder is an intermetallic compound capable of electrochemically intercalating and deintercalating hydrogen, and is mainly used as a negative electrode material for an alkaline storage battery. The hydrogen storage alloy powder repeatedly expands and contracts in the alkaline electrolyte through charge and discharge after making the battery. and. Due to this repeated expansion and contraction, the hydrogen storage alloy powder is activate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/38B22F1/00C22C19/00H01M10/30B22F1/145
CPCY02E60/124C22C19/03H01M4/383H01M10/345H01M4/242C22C1/0433C22C1/0408C22C2202/04C22C2202/02B22F1/0088C22C23/00Y02E60/10B22F1/145
Inventor 仲辻恭子大山秀明
Owner PANASONIC CORP
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