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A kind of negative electrode material suitable for aqueous metal ion battery and preparation method thereof

A metal ion and lithium ion battery technology, applied in the direction of battery electrodes, nanotechnology for materials and surface science, secondary batteries, etc., can solve the problem of less negative electrode materials, and achieve a good charge and discharge platform, large capacity, and battery life. The effect of high chemical reversibility

Active Publication Date: 2020-04-03
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

On the one hand, there are relatively few negative electrode materials suitable for the field of aqueous metal ion batteries, and the existing negative electrode materials are generally only suitable for specific aqueous metal ion batteries. Negative material

Method used

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  • A kind of negative electrode material suitable for aqueous metal ion battery and preparation method thereof
  • A kind of negative electrode material suitable for aqueous metal ion battery and preparation method thereof
  • A kind of negative electrode material suitable for aqueous metal ion battery and preparation method thereof

Examples

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Effect test

Embodiment 1

[0038] Preparation of negative electrode materials suitable for water-based metal-ion batteries: Stir 0.6g of bismuth nitrate pentahydrate, 6mL of ethylene glycol, and 12mL of acetone for 30 minutes as a bismuth-containing precursor solution, and put the cleaned titanium sheet with a thickness of 50 μm into the bismuth-containing Precursor solution, and placed in a 20mL polytetrafluoroethylene liner, then put the liner into a hydrothermal reaction vessel and seal it, and conduct a hydrothermal reaction at 160°C for 5 hours, then stop heating and cool to room temperature, and use ethanol and deionized water Rinse the residual solution on the surface of the sample, and grow a layer of bismuth oxide film on the surface of the titanium sheet current collector, which is suitable for the negative electrode material of the aqueous metal ion battery. The X-ray diffraction patterns of bismuth oxide thin films are shown in figure 1 , the scanning electron microscope image of the bismuth...

Embodiment 2

[0062] Preparation of negative electrode materials suitable for aqueous metal ion batteries:

[0063] 1) Preparation of bismuth oxide powder: Stir 0.6g of bismuth nitrate pentahydrate, 6mL of ethylene glycol, and 12mL of acetone for 30 minutes and place in a 20mL polytetrafluoroethylene liner, then put the liner into a hydrothermal reaction kettle and seal it. Hydrothermal reaction at 160°C for 5 hours, then stop heating and cool to room temperature, stir and wash the sample with ethanol and deionized water in a centrifuge, and dry to obtain nano-bismuth oxide powder;

[0064] 2) Preparation of negative electrode material: Add nano-bismuth oxide powder, carbon black and polyvinylidene fluoride (PVDF) to N-methylpyrrolidone solvent in a mass ratio of 8:1:1, and ball mill for 10 hours to prepare a slurry. Then the obtained slurry is uniformly coated on a thin titanium sheet with a thickness of 8 microns, baked at 120°C for 10 hours under vacuum, and finally pressed with a tablet...

Embodiment 3

[0068] Preparation of negative electrode materials suitable for water-based metal-ion batteries: Stir 0.6g of bismuth nitrate pentahydrate, 6mL of ethylene glycol, and 6mL of acetone for 30 minutes as a bismuth-containing precursor, put the cleaned titanium sheet into the bismuth-containing precursor, And put it in a 20mL polytetrafluoroethylene liner, then put the liner into a hydrothermal reaction kettle and seal it, and conduct a hydrothermal reaction at 120°C for 8 hours, then stop heating and cool to room temperature, and rinse the sample surface with ethanol and deionized water. A bismuth oxide film is grown on the surface of the titanium sheet current collector, which is suitable for the negative electrode material of the water-based metal ion battery. The scanning electron microscope image of the bismuth oxide film on the surface of the negative electrode material shows that the morphology of the obtained nano-bismuth oxide array film is similar to that obtained in Exam...

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Abstract

The invention relates to a negative electrode material suitable for water-based metal-ion batteries and a preparation method thereof. The negative electrode material contains bismuth oxide, and the negative electrode material is a nano-bismuth oxide array film, which is composed of bismuth oxide nanosheets oriented growth on a metal substrate. The bismuth oxide nanosheets are vertically and evenly densely distributed on the metal substrate in the form of an array, or obtained by forming a film on the metal substrate after uniformly mixing bismuth oxide powder with conductive additives and binders. The negative electrode material of the aqueous metal ion battery provided by the present invention is applicable to a wide range of aqueous battery systems, including aqueous lithium ion batteries, aqueous sodium ion batteries, aqueous potassium ion batteries, aqueous magnesium ion batteries, aqueous calcium ion batteries, aqueous strontium ion batteries, Aqueous barium ion battery and aqueous aluminum ion battery, etc. Moreover, the aqueous metal ion battery obtained based on the negative electrode material has a large capacity, a good charging and discharging platform, and high electrochemical reversibility.

Description

technical field [0001] The invention belongs to the technical field of water-based battery materials, and in particular relates to a negative electrode material suitable for water-based metal ion batteries and a preparation method thereof. Background technique [0002] Benefiting from the outstanding electrochemical properties, organic electrolyte lithium-ion batteries have been extensively studied and applied in recent years. However, organic electrolytes have great safety hazards, are relatively expensive, have high requirements for packaging, and have inherent defects such as slow lithium ion migration rate and high environmental pollution. In order to solve these problems of organic electrolytes, the Canadian company Moli Energy (Patent No. W095 / 20470) proposed the concept of a water-based lithium-ion battery using an aqueous solution as the electrolyte, using the greenest, safest and most sustainable water as a solvent. On this basis, Fudan University (Patent Publicati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/48H01M10/38C01G29/00B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01G29/00H01M4/48H01M10/38Y02E60/10Y02P70/50
Inventor 刘金平左文华朱伟华
Owner WUHAN UNIV OF TECH
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