# US 5,702,762 A · Manufacturing method of an active material suitable for non-sintered nickel electrodes for use in alkaline storage cells

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- Number: US 5,702,762 A
- Document ID: US5702762A
- Status: Granted
- Kind: A
- Application number: 08/665,703
- Filed: 1996-06-18
- Granted: 1997-12-30
- Earliest claimed: 1995-07-04
- Assignees: Sanyo Electric Co., Ltd.
- Inventors: Yoshitaka Baba; Motoo Tadokoro; Akifumi Yamawaki
- Web page: https://patentgrep.com/patent/US5702762A

## CPC

- H01M 4/32: Nickel oxide or hydroxide electrodes
- H01M 4/52: of nickel, cobalt or iron
- Y02E 60/10: Energy storage using batteries
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

In a method of manufacturing a nickel active material, nickel hydroxide particles coated with cobalt hydroxide are put on the mesh disk 4 of the fluidized granulator 1. Then, hot air is continuously supplied from outside through the hot air inlet 5, while air inside the fluidized granulator 5 is continuously emitted through the air outlet 8. At the same time, the nickel hydroxide particles are stirred with the stirring fan 3 and further dispersed by a hot air current. In this condition, an alkali aqueous solution is sprayed on the nickel hydroxide particles through the spray nozzle 7 by the pump 9. After the spray, the nickel hydroxide particles are further stirred in hot air so as to complete an alkali heat treatment.

## Claims

### Claim 1

A method of making a nickel electrode active material for use in an alkaline storage cell, which comprises:
spraying particles composed of nickel hydroxide coated with a cobalt compound, said particles being held on a porous holder, with an alkali in aqueous solution; and
supplying air through pores of the holder to stir and heat the particles being sprayed with the aqueous solution to a temperature between 40.degree. and 150.degree. C.

### Claim 2 (depends on 1)

The method according to claim 1, which further comprises mechanically stirring the particles held on the porous holder.

### Claim 3 (depends on 1)

The method according to claim 1, wherein the nickel hydroxide is coated between 1 and 14% by weight of the cobalt compound, as cobalt oxide.

### Claim 4 (depends on 1)

The method according to claim 1, wherein the aqueous solution contains between 10 and 40% by weight of the alkali.