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Nickel-hydrogen storage battery and method for manufacturing nickel-hydrogen storage battery

A nickel-metal hydride storage battery and nickel-hydrogen technology, applied in the manufacture of alkaline storage batteries, nickel storage batteries, battery electrodes, etc., can solve the problems of shortened battery life and adverse effects on battery characteristics, and achieve the effect of life extension

Pending Publication Date: 2022-02-22
PANASONIC EV ENERGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nickel hydroxide expands and contracts during charge and discharge, and this expansion and contraction adversely affects battery characteristics such as battery capacity, shortening the life of the battery

Method used

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  • Nickel-hydrogen storage battery and method for manufacturing nickel-hydrogen storage battery
  • Nickel-hydrogen storage battery and method for manufacturing nickel-hydrogen storage battery
  • Nickel-hydrogen storage battery and method for manufacturing nickel-hydrogen storage battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] Regarding the positive electrode plate, an active material paste containing nickel hydroxide as a main component was filled on a foamed nickel substrate, followed by drying, rolling, and cutting to produce a positive electrode plate. The positive electrode active material is nickel hydroxide coated with cobalt oxyhydroxide, water, carboxymethylcellulose (CMC), a thickener, and the like are mixed with the positive electrode active material to prepare a paste. Thereafter, the paste was filled on the foamed nickel substrate, dried, and press-molded to produce a positive electrode plate.

[0076] Add MmNi 5-x (Co,Mn,Al) x The alloy powder, thickening material and bonding material are mixed to form negative electrode mixture paste. In addition, the negative electrode mixture paste was applied to both sides of a long metal substrate (punched metal), dried and rolled, and cut into a predetermined size to produce a negative electrode plate.

[0077] Further production of pot...

Embodiment 2

[0080] In Example 1, except having adjusted the content (mol%) of potassium ions to 0.4 mol%, the nickel-metal hydride storage battery was produced by the same procedure.

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PUM

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Abstract

The invention relates to a nickel-metal hydride storage battery and a method for manufacturing the nickel-metal hydride storage battery. A battery module (11) is a nickel-hydrogen secondary battery provided with a positive electrode mixture containing a positive electrode active material having nickel hydroxide as a main component, the positive electrode includes positive electrode active material particles having lithium ions, sodium ions, and potassium ions inserted therein, and a tungsten complex layer covering the positive electrode active material particles, between crystal layers that expand and contract in accordance with charging and discharging. The concentration of potassium ions contained in the positive electrode active material particles is lower than the concentration of sodium ions, and the concentration of sodium ions is lower than the concentration of lithium ions.

Description

technical field [0001] The invention relates to a nickel-hydrogen storage battery and a manufacturing method of the nickel-hydrogen storage battery. Background technique [0002] As a nickel-metal hydride storage battery, a battery including a positive electrode including nickel hydroxide as a positive electrode active material is known. Nickel hydroxide expands and contracts during charge and discharge, and this expansion and contraction adversely affects battery characteristics such as battery capacity, shortening the life of the battery. In view of this, it has been proposed to form a zinc compound powder layer on the surface of nickel hydroxide (for example, see Patent Document 1). According to this method, it is known that zinc ions are present between the nickel layers of nickel hydroxide, thereby suppressing the expansion of the positive electrode active material and improving the lifetime. [0003] prior art literature [0004] patent documents [0005] Patent Do...

Claims

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Application Information

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IPC IPC(8): H01M4/62H01M4/525H01M10/28H01M10/30H01M10/44
CPCH01M4/628H01M4/624H01M4/525H01M10/44H01M10/30H01M10/28Y02E60/10Y02P70/50
Inventor 室田洋辅须藤良介
Owner PANASONIC EV ENERGY CO LTD