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Material with surface multilevel nano micron structure, preparation method thereof and nickel-zinc cell containing the material in anode

A nano-micron and nano-technology, applied in the field of inorganic advanced nanomaterials, can solve the problems of low capacity and poor cyclability, and achieve the effect of solving low capacity and poor cyclability.

Active Publication Date: 2014-09-17
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention solves the problems of poor cycle performance and low capacity of general electrode materials through the uniquely designed material with multi-level nano-micro structure on the surface, and has a good application in electrochemical energy storage

Method used

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  • Material with surface multilevel nano micron structure, preparation method thereof and nickel-zinc cell containing the material in anode
  • Material with surface multilevel nano micron structure, preparation method thereof and nickel-zinc cell containing the material in anode
  • Material with surface multilevel nano micron structure, preparation method thereof and nickel-zinc cell containing the material in anode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] a. put the foamed nickel base into the first reactor, then add cobalt nitrate comprising 0.05 mol / liter, 0.2 mol / liter ammonium fluoride and 0.25 mol / liter urea to the reactor Aqueous solution, then close the reaction kettle, raise the temperature to 120°C and keep it under autogenous pressure for 12 hours to carry out the first hydrothermal reaction, so as to grow cobalt hydroxide primary micron line arrays on the surface of the nickel foam substrate perpendicular to the substrate;

[0053] b. take out the nickel foam substrate, wash and dry;

[0054] c. put the foamed nickel base processed in step b into the second reactor, then add the second aqueous solution comprising 0.025 mol / liter of cobalt nitrate and 0.25 mol / liter of urea in the reactor, and seal the The reaction kettle is heated to 100°C and kept under autogenous pressure for 10 hours to carry out the second hydrothermal reaction, so that each primary micron wire of cobalt hydroxide forms a rectangular micro...

Embodiment 2

[0061] Referring to the method in embodiment 1, cobalt nitrate is replaced by cobalt chloride in embodiment 1 step a and step c, nickel nitrate is replaced by nickel chloride in step e, the material that obtains and the material that embodiment 1 obtains in They are very close in appearance and performance.

Embodiment 3

[0063] Referring to the method in Example 1, the porous conductive substrate was changed from foamed nickel substrate to carbon fiber felt, and the rest remained unchanged.

[0064] The resulting scanning electron microscope images can be found in the appendix Figure 7 , its XRD spectrum is shown in the appendix Figure 8 , and its cyclic voltammetry curve is shown in the appendix Figure 9 , and its charge-discharge curve is shown in Figure 10 , and its cycle stability diagram is shown in the appendix Figure 11 .

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Abstract

The invention discloses a material with surface multilevel nano micron structure. The material comprises: a porous conductive substrate, cobaltosic oxide primary rectangular micron sheet array growing on and perpendicular to the porous conductive substrate, and a plurality of villous nickel oxide secondary nanowires growing on the surface of each primary rectangular micron sheet. The invention also discloses a hydro-thermal synthesis method for preparing the material, and a cell containing the material in the anode, especially a nickel-zinc cell. The material has high specific surface area, can be used as the electrode material to improve the electrical contact performance of the electrode, thereby improving the overall electrical property of the electrode and cell containing the material.

Description

technical field [0001] The invention belongs to the technical field of inorganic advanced nanometer materials Background technique [0002] Among various batteries, the nickel-zinc battery has high working voltage, good energy density and power density, and is a high-energy, green and environment-friendly secondary power battery [J. Power Sources, 2000, 88, 202-205]. One of the key factors affecting battery performance is the electrode material. However, there are many problems in the electrode material of general commercial nickel-zinc batteries. For example, zinc electrodes are prone to branch crystals, passivation, etc., which lead to cycle life decay, and nickel electrodes also have swelling. And poisoning phenomenon, it is easy to cause the reduction of charging efficiency and capacity loss. It is still desirable to have better electrode materials and better nickel-zinc batteries to avoid the above-mentioned problems. Summary of the invention [0003] The invention ...

Claims

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Application Information

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IPC IPC(8): H01M4/52H01M10/30B82Y30/00B82Y40/00
CPCY02E60/124B82Y30/00B82Y40/00H01M4/366H01M4/52H01M10/30Y02E60/10
Inventor 孙晓明陆之毅吴小超
Owner BEIJING UNIV OF CHEM TECH
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