Method of preparing high capacity nickel electrode powder
AssigneeWestinghouse Electric Corp.
InventorsJohn F. Jackovitz, Earl A. Pantier
Life of this patent
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Abstract
An electrode plate is made by loading a supporting porous metallic plaque with active battery material made by: (1) hydrolyzing the reaction product of a starting material comprising an admixture of Ni oxide and effective amounts of sodium peroxide fused at temperatures between about 800.degree.C-1150.degree.C, the hydrolyzed solid reaction product containing electrochemically active Ni hydrated oxides and hydroxide forms, (2) if desirable, drying the product below about 65.degree.C, and (3) adding, at some step in the method, an amount of cobalt containing additive effective to provide about 2-12 wt% total Co in the active battery material based on Ni oxide plus Co content.
Claims15
A method of producing a battery electrode plate containing active battery material, comprising the steps of:
- a. mixing NiO with Na.sub.2 O.sub.2 in a weight ratio of NiO:Na.sub.2 O.sub.2 of between about 1:1.35 to about 1:2.1;
- b. heating the mixture of NiO and Na.sub.2 O.sub.2 between about 800.degree.C - 1150.degree.C, for about 1/2 hour to 8 hours, to melt the mixture and to form NaNiO.sub.2 ;
- c. hydrolyzing the NaNiO.sub.2 in water at between about 20.degree.C-95.degree.C to form active battery material and then washing the active battery material;
- d. maintaining the activity of the battery material by maintaining the temperature of the material below about 65.degree.C;
- and
- e. applying the battery material to a porous metallic plaque.
A method of producing a battery electrode plate containing active battery material, comprising the steps of:
- a. mixing an admixture of NiO and cobalt material selected from the group consisting of Co, Co.sub.2 O.sub.3, Co.sub.3 O.sub.4 and CoO and their mixtures and Na.sub.2 O.sub.2, wherein the weight ratio of NiO:Na.sub.2 O.sub.2 is between about 1:1.35 to about 1:2.1 and the amount of Co in the cobalt material is between about 2-12 wt% based on NiO plus Co content;
- b. heating the admixture at a temperature between about 800.degree.C-1150.degree.C for about one-half hour to 8 hours to melt the admixture and provide a reaction product consisting essentially of NaNiO.sub.2 and then cooling the reaction product NaCoO.sub.2 ;
- c. hydrolyzing the reaction product, forming an active battery material;
- d. washing the active battery material;
- and then maintaining the activity of the battery material by maintaining the temperature of the material below about 65.degree.C.;
- and
- e. applying the active battery material to a metallic plaque to provide a battery electrode.
Dependencies are inferred from the claim text.