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A kind of zinc-nickel battery negative electrode active material, zinc-nickel battery negative electrode sheet and zinc-nickel battery

A negative electrode active material, zinc-nickel battery technology, applied in the direction of battery electrodes, nickel storage batteries, alkaline storage batteries, etc., can solve the problems of easy solidification of the surface layer of negative electrode slurry, influence of coating consistency, and performance difference, etc., to improve battery performance. Cycle performance, improvement of cycle stability, effect of improvement of slurry stability

Active Publication Date: 2017-08-04
XINXIANG CHAOLI NEW ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the above technical solution, when the negative electrode active material is mixed, the surface layer of the negative electrode slurry is likely to solidify, causing dry skin or even agglomeration
When the subsequent coating process lasts for a long time, the condensed dry skin on the surface of the slurry will have a serious impact on the coating effect. Even if there is no condensed dry skin, the thickening of the slurry will also affect the consistency of the coating. influences
In this case, the prepared negative electrode sheets will be seriously inconsistent, resulting in performance differences between the electrode sheets in the battery or between batteries, resulting in a rapid decline in the electrochemical performance of the entire power supply system, affecting the performance of the power supply system. Normal use will lead to a serious decline in the cycle performance of the power system and reduce its service life

Method used

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  • A kind of zinc-nickel battery negative electrode active material, zinc-nickel battery negative electrode sheet and zinc-nickel battery
  • A kind of zinc-nickel battery negative electrode active material, zinc-nickel battery negative electrode sheet and zinc-nickel battery

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Experimental program
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Effect test

Embodiment 1

[0027] The zinc-nickel battery negative electrode active material of the present embodiment comprises the following components by weight percentage: zinc oxide ZnO62.94%, zinc Zn24.60%, indium oxide In 2 o 3 0.12%, bismuth oxide Bi 2 o 3 1.96%, binder PTFE 4.80%, thickener 0.49%, conductive carbon fiber 1.23%, potassium fluoride KF 0.17%, polypropylene (PP) fiber 0.98%, dispersant sodium polyacrylate (Ocean 5040) 0.25%, glycerin 1.23%, phosphate 1.23%, wherein the phosphate is composed of disodium hydrogen phosphate and sodium dihydrogen phosphate with a mass ratio of 10.9:2.3, and the thickener is composed of carboxymethylcellulose sodium (CMC) with a mass ratio of 2:1 Composed of polyethylene oxide (PEO).

[0028] The negative electrode sheet of the zinc-nickel battery in this embodiment includes a current collector copper foil and a negative electrode active material coated on the current collector, and the negative electrode active material is the above-mentioned nega...

Embodiment 2

[0035] The zinc-nickel battery negative electrode active material of the present embodiment comprises the following components by weight percentage: zinc oxide ZnO48.63%, zinc Zn35.58%, indium oxide In 2 o 3 0.36%, bismuth oxide Bi 2 o 32.37%, binder PTFE 5.93%, thickener 0.38%, conductive carbon fiber 0.59%, potassium fluoride KF 0.24%, polypropylene (PP) fiber 0.59%, dispersant sodium polyacrylate (Ocean 5040) 0.59%, glycerin 2.037%, phosphate 2.37%, wherein the phosphate is composed of disodium hydrogen phosphate and sodium dihydrogen phosphate with a mass ratio of 10.9:2.3, and the thickener is composed of carboxymethylcellulose sodium (CMC) with a mass ratio of 2:1 Composed of polyethylene oxide (PEO).

[0036] The negative electrode sheet of the zinc-nickel battery in this embodiment includes a current collector copper foil and a negative electrode active material coated on the current collector, and the negative electrode active material is the above-mentioned negat...

Embodiment 3

[0043] The zinc-nickel battery negative electrode active material of the present embodiment comprises the following components by weight percentage: zinc oxide ZnO71.07%, zinc Zn12.75%, indium oxide In 2 o 3 0.06%, bismuth oxide Bi 2 o 3 1.27%, binder PTFE 3.82%, thickener 0.56%, conductive carbon fiber 6.37%, potassium fluoride KF 0.13%, polypropylene (PP) fiber 1.27%, dispersant sodium polyacrylate (Ocean 5040) 0.13%, glycerin 0.64%, phosphate 1.91%, wherein the phosphate is composed of disodium hydrogen phosphate and sodium dihydrogen phosphate with a mass ratio of 10.9:2.3, and the thickener is composed of hydroxypropyl methylcellulose and polystyrene with a mass ratio of 2:1 Composition of ethylene oxide (PEO).

[0044] The negative electrode sheet of the zinc-nickel battery in this embodiment includes a current collector copper foil and a negative electrode active material coated on the current collector, and the negative electrode active material is the above-menti...

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Abstract

The invention relates to a zinc-nickel battery negative electrode active substance, a zinc-nickel battery negative electrode plate and a zinc-nickel battery, and belongs to the technical field of zinc-nickel batteries. The zinc-nickel battery negative electrode active substance is prepared from, by weight, 45%-72% of ZnO, 12%-36% of Zn, 0.06%-0.36% of In2O3, 1.2%-2.5% of Bi2O3, 3.8%-6% of binder, 0.35%-0.66% of thickener, 0.55%-6.5% of conductive carbon fibers and 1.2%-2.5% of polyhydric alcohols. The polyhydric alcohols are added in the zinc-nickel battery negative electrode active substance, the uniformity and stability of the negative electrode active substance in the slurry-stirring process are maintained, slurry can be kept in an initial state for a long time, the manufacturing consistency of electrode plates is guaranteed, and therefore the consistency of batteries is guaranteed fundamentally and the cycling stability of a power system is improved.

Description

technical field [0001] The invention relates to a zinc-nickel battery negative electrode active material, a zinc-nickel battery negative electrode sheet and a zinc-nickel battery, belonging to the technical field of zinc-nickel batteries. Background technique [0002] With the increasing requirements of the current society for the development of green energy, zinc-nickel batteries, as a new type of secondary battery, are widely used in power tools and electric vehicles due to their low self-discharge, low cost, and high open circuit voltage and discharge current. The field has good application prospects. Especially in recent years, with the active support of national policies, zinc-nickel secondary batteries have been used more and more in the field of electric vehicles. Due to the driving characteristics of electric vehicles, the safety requirements for power batteries are very high, and the consistency of batteries is a key factor affecting battery safety, so how to impro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/48H01M4/38H01M4/62H01M10/30
CPCH01M4/38H01M4/48H01M4/62H01M4/621H01M4/625H01M10/30Y02E60/10
Inventor 王明煜徐松
Owner XINXIANG CHAOLI NEW ENERGY