ZINC FOIL, PRIMARY BATTERY NEGATIVE ELECTRODE ACTIVE MATERIAL USING SAME, AND ZINC FOIL PRODUCTION METHOD

Title:

ZINC FOIL, PRIMARY BATTERY NEGATIVE ELECTRODE ACTIVE MATERIAL USING SAME, AND ZINC FOIL PRODUCTION METHOD

Document Type and Number:

WIPO Patent Application WO/2020/071350

Kind Code:

A1

Abstract:

Provided is a zinc foil which, when used as a negative electrode active material, can reduce the generation of gas during long-term storage of a battery compared to conventional foils. This zinc foil contains zinc as a base material, and contains bismuth. The bismuth content is 100-10000 ppm on a mass basis. Crystal grains of zinc have a particle size of 0.2-8 µm. Crystal grains of bismuth have a particle size of less than 1000 nm when measured using a backscattered electron image taken by a scanning electron microscope. The zinc foil is free from aluminum and/or lead, or even in the case where the zinc foil contains aluminum and/or lead, the aluminum content is 1% or less on a mass basis and/or the lead content is 200 ppm or less on a mass basis.

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Inventors:

KAMADA TSUNEYOSHI (JP)
KUMADA NAOKI (JP)
SAKANO MASASHI (JP)
INOUE HIDETOSHI (JP)
NAGAOKA HIDEYUKI (JP)
OCHI YASUHIRO (JP)

Application Number:

PCT/JP2019/038713

Publication Date:

April 09, 2020

Filing Date:

October 01, 2019

Export Citation:

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Assignee:

MITSUI MINING & SMELTING CO (JP)

International Classes:

C22C18/00; C25D1/00; C25D1/04; H01M4/42

Domestic Patent References:

WO2006040857A1	2006-04-20
WO2005064713A1	2005-07-14

Foreign References:

JP2000058045A	2000-02-25
CN103233141A	2013-08-07
JP2008171762A	2008-07-24

Other References: