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Nickel-based cell anode, its preparation method and nickel-based cell by using anode

A battery positive electrode, nickel-based technology, applied in the field of nickel-based battery positive electrode and its preparation, can solve the problems of high internal resistance of nickel-based battery, uneven dispersion of insoluble calcium salt additives, complicated preparation process, etc. Improved loop performance, simple step effect

Active Publication Date: 2014-03-19
河南省恒明新能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the deficiencies of the prior art, the present invention provides a nickel-based battery positive electrode modified with soluble calcium salts and a preparation method thereof, which solves the problem of the complex preparation process of calcium salt-coated nickel hydroxide in the prior art and the insoluble calcium The uneven dispersion of salt additives causes the technical problem of high internal resistance of the nickel-based battery. In addition, the invention also provides an alkaline nickel-based secondary battery prepared by using the nickel-based battery positive electrode

Method used

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  • Nickel-based cell anode, its preparation method and nickel-based cell by using anode
  • Nickel-based cell anode, its preparation method and nickel-based cell by using anode
  • Nickel-based cell anode, its preparation method and nickel-based cell by using anode

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Effect test

Embodiment 1

[0016] Preparation of positive electrode: (1) Mix 100g of spherical nickel hydroxide, 5g of cobaltous oxide and 5g of T255 nickel powder to make active material mixture; (2) mix 1.0g of calcium metaborate and 2.5g of hydroxypropylmethyl After the cellulose is mixed evenly, add it to 20g of deionized water, and stir to form a uniform aqueous solution; (3) Add the active material mixture prepared in step (1) to the aqueous solution in step (2), and add 1.0g polytetrafluoroethylene The vinyl fluoride emulsion is mixed evenly to make a slurry; (4) A positive electrode product with a length and width of 90mm×42mm is prepared through processes such as pulp drawing, drying, cutting, powder cleaning, and electrode ear welding.

[0017] Preparation of the negative electrode: The hydrogen storage alloy powder is rolled onto the copper grid of the negative electrode substrate using the nickel-metal hydride battery dry negative electrode process, and a layer of polytetrafluoroethylene emul...

Embodiment 2

[0020] Production of the positive electrode: (1) Mix 100g of spherical nickel hydroxide, 0.25g of cobaltous oxide and 0.25g of T255 nickel powder to make an active material mixture; (2) Mix 0.01g of calcium borate and 0.5g of carboxymethyl fiber Mix plain sodium evenly and add to 10g of deionized water, stir to form a uniform aqueous solution; (3) Add the active material mixture prepared in step (1) to the aqueous solution in step (2), and add 0.1g of polytetrafluoroethylene The ethylene emulsion is mixed evenly to make a slurry; (4) A positive electrode product with a length and width of 90mm×42mm is prepared through processes such as pulp drawing, drying, cutting, powder cleaning, and electrode ear welding.

[0021] Preparation of the negative electrode: The hydrogen storage alloy powder is rolled onto the copper grid of the negative electrode substrate using the nickel-metal hydride battery dry negative electrode process, and a layer of polytetrafluoroethylene emulsion is so...

Embodiment 3

[0024]Production of positive electrode: (1) Mix 100 parts of spherical nickel hydroxide, 2 g of cobaltous oxide and 4 g of T255 nickel powder to make active material mixture; (2) Mix 5 g of calcium metaborate and 5 g of hydroxypropyl methylcellulose (3) Add the active material mixture prepared in step (1) to the aqueous solution in step (2), and add 2g of polytetrafluoroethylene emulsion Mix evenly to make a slurry; (4) Prepare a positive electrode product with a length and width of 90mm×42mm through processes such as pulp drawing, drying, cutting, powder cleaning, and electrode ear welding.

[0025] Preparation of the negative electrode: The hydrogen storage alloy powder is rolled onto the copper grid of the negative electrode substrate using the nickel-metal hydride battery dry negative electrode process, and a layer of polytetrafluoroethylene emulsion is soaked on the surface. After drying and rolling, it is cut into pieces. The finished negative electrode with a size of 12...

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Abstract

The invention discloses a nickel-based cell anode, its preparation method and a nickel-based cell by using the anode. A technical scheme main point is characterized in that the nickel-based cell anode comprises an anode active material, the anode active material contains nickel hydroxide and soluble calcium salt calcium metaborate or calcium borate calcium borate, wherein the content of soluble calcium salt calcium metaborate or calcium borate accounts for 0.01-5% of weight of nickel hydroxide. The invention also discloses a preparation method of the nickel-based cell anode and an alkalescence nickel-based secondary cell by using the nickel-based cell anode. According to the invention, calcium ion uniform distribution and introduction of beneficial anion in the soluble calcium salt can effectively improve the comprehensive performance of the nickel-based cell, the nickel-based cell internal resistance is reduced, the high temperature performance is increased, and the cycle performance is improved.

Description

technical field [0001] The invention belongs to the technical field of nickel-based batteries, and in particular relates to a nickel-based battery positive electrode, a preparation method thereof and a nickel-based battery using the positive electrode. Background technique [0002] Existing alkaline nickel-based secondary batteries include cadmium-nickel batteries, hydrogen-nickel batteries, zinc-nickel batteries, and iron-nickel batteries, etc., which have different performances and application paths, and are widely used in people's daily life and industrial production. Each is at a different stage of development. Since the negative electrode contains toxic cadmium, nickel-cadmium batteries will cause environmental problems of heavy metal pollution. At present, they are gradually replaced by nickel-hydrogen batteries and are beginning to withdraw from the market. The negative electrode of the hydrogen-nickel battery uses hydrogen storage alloy as the active material, which...

Claims

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Application Information

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IPC IPC(8): H01M4/32H01M4/58H01M4/26H01M10/30
CPCY02E60/124H01M4/28H01M4/32H01M4/52H01M4/62H01M10/30Y02E60/10
Inventor 上官恩波李晶李全民常照荣郭丹赵桐辉
Owner 河南省恒明新能源有限公司
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