Anode material suitable for aqueous metal ion battery and preparation method for same

A technology of negative electrode material and metal ion, which is applied in the field of negative electrode material of water-based metal ion battery and its preparation, can solve the problem of less negative electrode material, and achieve the effects of good charging and discharging platform, large capacity and stable output voltage.

Active Publication Date: 2016-12-14
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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  • Anode material suitable for aqueous metal ion battery and preparation method for same
  • Anode material suitable for aqueous metal ion battery and preparation method for same
  • Anode material suitable for aqueous metal ion battery and preparation method for same

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 of the nano-bism...

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Abstract

The invention relates to an anode material being suitable for an aqueous metal ion battery and a preparation method for the same. The anode material contains bismuth oxide and is a nano bismuth oxide array thin film, which is formed by oriented growth of bismuth oxide nano sheets on a metal substrate. The bismuth oxide nano sheets are vertically, uniformly and densely distributed on the metal substrate in an array structure, or that bismuth oxide powder is uniformly mixed with a conductive additive and a binder to form a film on the metal substrate. The anode material is suitable for many types of aqueous batteries, 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 batteries, aqueous aluminum ion batteries, etc. The aqueous metal ion battery based on the anode material has high capacity, good charging/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 Applications(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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