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Zinc ion battery positive electrode active material, positive electrode material, zinc ion battery positive electrode, zinc ion battery and preparation method and application thereof

A cathode active material, a technology for zinc ion batteries, applied in battery electrodes, electrolyte battery manufacturing, secondary batteries, etc., can solve the problems of poor cathode structure stability, low capacity, slow intercalation kinetics, etc., to achieve low cost, high Specific capacity, the effect of alleviating high cost

Active Publication Date: 2019-04-23
SHENZHEN INST OF ADVANCED TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] One of the objectives of the present invention is to provide a positive electrode active material for zinc ion batteries, which alleviates the problems of low capacity, poor positive electrode structure stability and slow intercalation kinetics that exist in current zinc ion batteries.

Method used

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  • Zinc ion battery positive electrode active material, positive electrode material, zinc ion battery positive electrode, zinc ion battery and preparation method and application thereof
  • Zinc ion battery positive electrode active material, positive electrode material, zinc ion battery positive electrode, zinc ion battery and preparation method and application thereof
  • Zinc ion battery positive electrode active material, positive electrode material, zinc ion battery positive electrode, zinc ion battery and preparation method and application thereof

Examples

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preparation example Construction

[0077] According to a fourth aspect of the present invention, there is provided a method for preparing the positive electrode of the above-mentioned zinc ion battery, comprising the following steps:

[0078] The positive electrode material of the zinc ion battery, the conductive agent, the binder and the solvent are mixed to prepare a slurry, which is coated on the surface of the positive electrode current collector to obtain the positive electrode of the zinc ion battery.

[0079] Solvents include, but are not limited to, NMP (N-methylpyrrolidone) or water.

[0080] The positive electrode material is made into slurry, and the positive electrode material layer is formed after coating to obtain the positive electrode, and the preparation is simple.

[0081] According to a fifth aspect of the present invention, a zinc ion battery is provided, comprising the positive electrode, the negative electrode, the separator and the electrolyte obtained by the above-mentioned positive electr...

Embodiment 1

[0107] A kind of zinc ion battery, the positive electrode active material adopts T-Nb 2 O 5 , the negative electrode is zinc flakes.

[0108] The preparation method of zinc ion battery comprises the following steps:

[0109] (1) Preparation of niobium pentoxide positive electrode: add 0.7g of niobium pentoxide powder, 0.2g of carbon black, and 0.1g of polyvinylidene fluoride into an agate mortar, fully grind, and then drop an appropriate amount of N-methylpyrrolidone Mixed into a uniform slurry; then the slurry was evenly coated on the surface of the titanium foil (positive electrode current collector) and vacuum-dried, and the electrode sheet obtained by drying was cut into discs with a diameter of 12 mm, and the positive electrode was obtained after compaction;

[0110] (2) Preparation of zinc flake negative electrode: the zinc foil is cut into a disc with a diameter of 14 mm, and the negative electrode is obtained after cleaning and drying;

[0111] (3) preparation of el...

Embodiment 2-4

[0115] The only difference between Examples 2-4 and Example 1 is that the crystal forms of the positive electrode active materials are different, as shown in Table 1.

[0116] Table 1

[0117] Example number

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Abstract

The invention discloses a zinc ion battery positive electrode active material, a positive electrode material, a zinc ion battery positive electrode, a zinc ion battery and a preparation method and application thereof, and relates to the technical field of zinc ion batteries. The zinc ion battery positive electrode active material comprises niobium oxide or a composite material thereof. According to the invention, the niobium oxide or the composite material of the niobium oxide is applied to the positive electrode active material of the zinc ion battery. The niobium oxide or the niobium composite material has a rapid zinc ion transmission channel, so that the rapid intercalation and deintercalation of zinc ions can be realized. The prepared zinc ion battery has the advantages of long cyclelife, high specific capacity and low cost. The problems of limited lithium resource reserve and high cost of the existing lithium ion battery are solved. The problems of low capacity, poor stability of a positive electrode structure, slow intercalation dynamics and the like of the existing zinc ion battery positive electrode active material are solved.

Description

technical field [0001] The invention relates to the technical field of zinc ion batteries, in particular, to a positive electrode active material of a zinc ion battery, a positive electrode material, a positive electrode of a zinc ion battery, a zinc ion battery, and a preparation method and application thereof. Background technique [0002] With the popularization of portable electronic devices such as computers, mobile phones, and tablets, as well as the vigorous development of green and environmentally friendly electric vehicles, people's demand for secondary batteries is increasing. As the most widely used secondary battery, lithium-ion batteries are also exposed. Some shortcomings: the shortage of lithium resources causes its price to rise year by year, the negative electrode is easy to form lithium dendrites and cause short circuits, and the organic electrolyte is flammable, all of which have certain safety hazards. Therefore, it is necessary to find a new type of seco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/485H01M4/36H01M4/1391H01M10/054H01M10/058
CPCH01M4/1391H01M4/362H01M4/485H01M10/054H01M10/058Y02E60/10Y02P70/50
Inventor 唐永炳王勇张帆
Owner SHENZHEN INST OF ADVANCED TECH
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