Alkaline storage battery and method for producing an electrode used therefor
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsToru Inagaki, Hiroki Takeshima, Kazushige Sugimoto, Katsuhiro Okamoto
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Abstract
Disclosed is an alkaline storage battery which exhibit exceptional charge/discharge and cycle life characteristics by improved current collection and active material retention of the electrode substrate. The electrode comprises a substrate composed of a conductive core material and fibrous nickel members unitary sintered on both surfaces of the conductive core material, and a layer of an active material filled into the substrate. The fibrous nickel members of the substrate are bent or curved at least at their tip ends inside the active material layer to retain the active material.
Claims11
An alkaline storage battery comprising a positive electrode, a negative electrode, a separator and an alkaline electrolyte, wherein
- at least one of said positive electrode and negative electrode comprises a substrate composed of a conductive core material and fibrous nickel members unitary sintered on both surfaces of said conductive core material, and a layer of an active material filled into said substrate, said fibrous nickel members of said substrate having at least tip ends being bent or curved inside said layer of the active material so as to retain said active material.
An alkaline storage battery comprising a positive electrode, a negative electrode, a separator and an alkaline electrolyte, wherein
- at least one of said positive electrode and negative electrode comprises a substrate composed of a conductive core material and fibrous nickel members unitary sintered on both surfaces of said conductive core material, and a layer of an active material filled into said substrate, said fibrous nickel members of said substrate being higher in surface density on the surface of the electrode than in the center of the electrode along its thickness.
A method for producing an electrode for alkaline storage batteries, said method comprising the steps of:
- applying an adhesive onto both surfaces of a conductive core material,
- implanting resin fibers on the adhesive-coated conductive core material,
- coating metallic nickel on the respective surfaces of said conductive core material and said resin fibers bonded thereto,
- heating the whole to remove said resin fibers and said adhesive by thermal decomposition,
- sintering said metallic nickel covering the respective surfaces of said conductive core material and said resin fibers to form an electrode substrate,
- pressing the resultant substrate primarily to adjust its thickness,
- filling an active material into said substrate, and
- pressing the resultant active material-filled substrate again so as to adjust its thickness to a desired thickness.
Dependencies are inferred from the claim text.