KR970018807A - Nickel hydrogen battery electrode and its manufacturing method - Google Patents

Abstract

The present invention provides a nickel-metal hydride battery in which a negative electrode active material is MH, a positive electrode active material is Ni (OH) ₂ , and a concentrated KOH aqueous solution is used as an electrolytic solution. A cathode composed of hydrogen as an active material, a carbonyl nickel powder molded and calcined in a porous body, MmNi ₅ , Mm is an alloy mainly composed of about 50% Ce, about 30% La, about 15% Nd and Al, Mn, Co or The present invention provides filling with so-called mismetal-based alloy powder containing a predetermined amount of Ni and an alloy of AB ₂ (A is Ti, Zr or Mg, and B is Mn, V, Co, Cr, Fe, or Ni).

Description

Nickel hydrogen battery electrode and its manufacturing method

Since this is an open matter, no full text was included.

The figure is a graph showing the charge / discharge characteristics of the nickel hydrogen electrode used as an anode using the electrode (a) of the M ₅ series AB ₅ hydrogen storage alloy and the electrode (b) according to the present invention.

Claims (8)

MmNi ₅ , Mm is an alloy composed mainly of about 50% Ce, about 30% La, and about 15% Nd, and a so-called Mish containing a predetermined amount of Al, Mn, Co or Ni in a porous body formed by carbonyl nickel powder. A nickel-hydrogen battery formed by filling and drying a metal-based alloy powder and AB ₂ (A is Ti, Mg or Zr, and B is Mn, Cr, V, Fe, Co, or Ni) by mixing with a binder Electrode for cathode. The carbon black powder according to claim 1, wherein a powder of a mismetal series alloy powder and AB ₂ (A is Ti, Mg or Zr, and B is Mn, Cr, V, Fe, Co, or Ni) are mixed in the carbon black. The conductive material selected from the group consisting of nickel, CuO, or Cu ₂ O is a alloy powder of a mismetal series and AB ₂ (A is Ti, Mg or Zr, and B is Mn, Cr, V, Fe, Co). Or Ni) 30% by weight or less based on the total amount of Ni-MH batteries. The anode-type electrode of a nickel-hydrogen battery according to claim 1, wherein the alloy powder of the mischmetal series has a particle size of 75 µm or less in average particle size. The nickel-hydrogen battery electrode according to claim 1, wherein the Ravis phase alloy is contained in an amount of 30 wt% or less with respect to the misch metal alloy in the form of powder having an average particle diameter of 10 µm or less. 1) Forming and firing carbonyl nickel powder to prepare a porous body, and 2) MmNi ₅ , Mm is Al, Mn, Co or Ni in an alloy mainly composed of about 50% Ce, about 30% La, about 15% Nd Sludge is prepared by mixing a so-called mismetal-based alloy powder and AB ₂ (A is Ti, Zr or Mg, and B is Mn, V, Fe, Cr, Co, or Ni) with a binder in a predetermined amount. And 3) filling the sludge produced by mixing the fine metal alloy and the lavis phase alloy powder with the binder into the porous body, and 4) drying the nickel hydrogen battery negative electrode. The carbon black of claim 5, wherein in the mixing of the powder of the mismetal-based alloy powder with the powder of AB ₂ (A is Ti, Zr or Mg, and B is Mn, V, Fe, Cr, Co, or Ni). And nickel, or mixed with a conductive material such as CuO, Cu ₂ O, or the like. The method of claim 5 or 6, wherein the addition amount of the conductive material is a mismetal alloy powder and AB ₂ (A is Ti, Zr or Mg, B is Mn, V, Cr, Fe, Co, or Ni) The amount of 0.5 to 4% by weight based on the combined amount of. The method according to claim 5, wherein 0.5 to 6% by weight of polytetrafluoroethylene is used as the binder. ※ Note: The disclosure is based on the initial application.