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Multi-stage micro-nano structural material, preparation method thereof, battery containing multi-stage micro-nano structural material

A nano-micron and micro-sheet technology, applied in the field of advanced inorganic nanomaterials, can solve problems such as high synthesis temperature, environmental hazards, and poor crystallinity

Active Publication Date: 2014-04-23
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are obvious defects in the electrode materials for making nickel-iron batteries. For example, some require relatively high synthesis temperature, some powder materials have poor crystallinity, do not contact with the current collector, have poor electron transmission effect, and some have harmful effects on the environment. obvious hazard

Method used

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  • Multi-stage micro-nano structural material, preparation method thereof, battery containing multi-stage micro-nano structural material
  • Multi-stage micro-nano structural material, preparation method thereof, battery containing multi-stage micro-nano structural material
  • Multi-stage micro-nano structural material, preparation method thereof, battery containing multi-stage micro-nano structural material

Examples

Experimental program
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Effect test

Embodiment 1

[0066] a. put the foamed copper substrate into the first reactor at an angle, then add cobalt nitrate comprising 0.05 mol / liter, the first ammonium fluoride of 0.2 mol / liter and urea of ​​0.25 mol / liter 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 microrod arrays on the surface of the copper foam substrate perpendicular to the substrate;

[0067] b. Take out the copper foam substrate, wash and dry;

[0068] c. put the foamed copper substrate treated in step b into the second reactor, and then add ferric nitrate containing 0.075 mol / liter, 0.2 mol / liter of ammonium fluoride and 0.25 mol / liter to the reaction kettle The second aqueous solution of urea, seal the reaction kettle, raise the temperature to 100 ° C and keep it under autogenous pressure for 6 hours to carry out the second hydrothermal...

Embodiment 2

[0073] Referring to the method in Example 1, the temperature in step a of Example 1 is changed to 100° C., and the time is changed to 6 hours.

[0074] Its scanning electron microscope picture is shown in the appendix Figure 6 , its XRD spectrum is shown in the appendix Figure 7 , and its cyclic voltammetry curve is shown in the appendix Figure 8 , and its cycle stability diagram is shown in the appendix Figure 9 .

Embodiment 3

[0076] Referring to the method in Example 1, the copper foam substrate is replaced with a nickel foam substrate.

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Abstract

The invention discloses a material with a multi-stage micro-nano structural material on surface. The multi-stage micro-nano structural material comprises a porous conductive substrate, and primary nano-rods or primary micron-piece arrays, wherein the primary nano-rods or primary micron-piece arrays grow vertical to the substrate, a plurality of ferroferric oxide secondary nano-rods radially grow on each primary micron-rod, or a plurality of ferroferric oxide secondary nano-rods grow perpendicular to each primary micron-piece on the corresponding micron-piece. The material can be used as a negative electrode material for a battery, in particular an alkali battery; the battery using the negative electrode material has unique advantages, such as high energy storage characteristics, large specific capacity, high energy density, high power density and high cycling performance, which can be kept very well under high-and-low current density.

Description

technical field [0001] The invention belongs to the technical field of inorganic advanced nanometer materials. Background technique [0002] Alkaline batteries are considered to be environmentally friendly and high-efficiency batteries that can be used repeatedly, and nickel-iron batteries are an important branch of them. The positive electrode active material of the nickel-iron battery is mainly nickel oxyhydroxide, and the negative electrode active material is mainly iron. It is a light, long-life and easy-to-maintain alkaline storage battery [J.Power.Sources.,1984,12,177-192]. Compared with nickel-cadmium batteries and lead-acid batteries widely used at present, the cycle life of this battery can reach more than 2,000 times, and the service life is more than 20 years, so it has received widespread attention and vigorous development from the society. However, there are obvious defects in the electrode materials for making nickel-iron batteries. For example, some require r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/52H01M10/30B82Y30/00
CPCY02E60/124B82Y30/00B82Y40/00C01G49/08C01G51/04C01G53/04H01M4/52H01M4/661H01M4/663H01M10/30H01M4/521H01M2300/0002Y02E60/10
Inventor 孙晓明吴小超陆之毅
Owner BEIJING UNIV OF CHEM TECH
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