Highly corrosion-resistant porous metal body

Abstract

Provided are a porous metal body that is excellent in terms of corrosion resistance and that is suitable for a collector for batteries such as lithium-ion batteries, capacitors, or fuel cells; and methods for producing the porous metal body. A production method includes a step of coating a porous nickel body with an alloy containing at least nickel and tungsten or a metal containing at least tin; and a subsequent step of a heat treatment. Another production method includes a step of forming a nickel-plated layer on a porous base and then continuously forming an alloy-plated layer containing at least nickel and tungsten or tin, a step of removing the porous base, and a step of reducing metal. Such a method can provide a porous metal body in which tungsten or tin is diffused in a porous nickel body or a nickel-plated layer.

1 - 4 . (canceled) 
     
     
         5 : A porous metal body comprising an alloy containing at least nickel and tungsten. 
     
     
         6 : The porous metal body according to  claim 5 , wherein the porous metal body has a nickel content of 60 mass % or more and 95 mass % or less and a tungsten content of 5 mass % or more and 40 mass % or less. 
     
     
         7 : The porous metal body according to  claim 5 , wherein the porous metal body further contains, as a component, 10 mass % or less of phosphorus. 
     
     
         8 : The porous metal body according to  claim 5 , wherein the porous metal body has been subjected to an electrolytic oxidation treatment in liquid so as to have enhanced corrosion resistance. 
     
     
         9 - 19 . (canceled)