Cylindrical alkaline battery

An alkaline battery, cylindrical technology, used in dry batteries, battery electrodes, active material electrodes, etc., can solve the problems of promoting zinc corrosion, reducing the quality of liquid leakage, and increasing the production of hydrogen.

Inactive Publication Date: 2007-08-22
FDK ENERGY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] On the other hand, in the case of using an amalgam-free alloy of zinc as the main component as the active material of its anode gel, a problem occurs that impurities such as Fe, Ni, Cr, or Co adhered to the surface of the anode electron collector promote Corrosion of zinc in the anode gel, thus increasing the amount of hydrogen gas produced
That is, it was found that in over-discharged cells, Sn that had been electrolessly plated to mask impurities on the surface of the anode electron collector also resulted in a decrease in the quality of the anti-leakage

Method used

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  • Cylindrical alkaline battery

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Embodiment 1

[0039] As Example 1, a cylindrical alkaline battery (LR03) having the structure shown in FIG. 1 was prepared according to Specification 1.

[0040] == Specification 1 ==

[0041] (1) Cathode mixture: prepared from electrolytic manganese dioxide, graphite as a conductive material, binder and 40% KOH aqueous solution.

[0042] (2) Anode gel: prepared from zinc alloy with a particle size in the range of 50-250 mesh, 40% KOH aqueous solution and polyacrylic acid as a thickening material.

[0043] (3) Anode gel additive: no

[0044] (4) Anode electron collector: a brass plate is used as a substrate, and its surface is electrolessly plated with Sn.

[0045] (5) The thickness of the electroless coating on the surface of the anode electron collector: 0.07-0.095 microns

Embodiment 2

[0047] As Example 2, a cylindrical alkaline battery (LR03) having the structure shown in FIG. 1 was prepared according to Specification 2.

[0048] == Specification 2 ==

[0049] (1) Cathode mixture: same as in specification 1.

[0050] (2) Anode gel: Same as in specification 1.

[0051] (3) Anode gel additive: add indium oxide at a concentration of 100 ppm to the anode gel.

[0052] (4) Anode electron collector: Same as in specification 1.

[0053] (5) Thickness of the electroless plating layer on the surface of the anode electron collector: the same as in specification 1 (0.07-0.095 μm).

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Abstract

In a cylindrical alkaline battery (10) which uses a mercury-free alloy with zinc as the main ingredient as an active material of its anode gel (18) and copper or an alloy with copper as the main ingredient as its anode electron collector (25), the surface of the anode electron collector (25) is electroless-plated with Sn to form an electroless plate film (251) of 0.05 to 0.095 m in thickness.To improve the liquid leakage resistance, especially liquid leakage resistance at over discharge, of cylindrical alkaline battery in which an alloy composed mainly of mercury-free zinc is used as an active material of negative electrode gel. [MEANS FOR SOLVING PROBLEMS] There is provided cylindrical alkaline battery (10) comprising negative electrode gel (18) in which an alloy composed mainly of mercury-free zinc is used as an active material and negative electrode current collector (25) constituted of copper or an alloy composed mainly of copper, wherein an electroless plating of Sn is applied to the surface of the negative electrode current collector (25), the electroless plating (251) having a thickness of 0.05 to 0.095 m.

Description

[0001] Related Application Cross Reference [0002] This application claims priority from Japanese Patent Application No. 2004-209929 filed Jul. 16, 2004, which is incorporated herein by reference. technical field [0003] The present invention relates to cylindrical alkaline batteries, and particularly to alkaline dry batteries using amalgam-free alloys of zinc as a main component as their anode gel active materials. Background technique [0004] For example, a cylindrical alkaline battery (dry battery) like LR03 uses a zinc-based alloy as the active material for its anode gel, and copper or a copper-based alloy as its anode electron collector material. [0005] In an alkaline battery using zinc as an anode active material, corrosion of zinc causes hydrogen gas to be generated when the battery is stored, increasing the pressure inside the battery, thus activating the safety valve of its resin-made sealing ring, causing electrolyte, etc. to flow out of the battery , that i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/75B22F1/00C23C18/31H01M4/06H01M4/42H01M4/62H01M4/66H01M6/08
CPCH01M4/661H01M4/75H01M4/662H01M4/42H01M6/08B22F1/0003H01M2004/023C23C18/52H01M4/667C23C18/31B22F1/00
Inventor 村上行由筒井清英
Owner FDK ENERGY CORP
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