A negative electrode material for pyrolytic carbon battery embedded with tin-based oxide and its preparation method

A battery negative electrode, pyrolysis carbon technology, applied in the direction of battery electrodes, active material electrodes, negative electrodes, etc.

Active Publication Date: 2021-03-16
东北大学秦皇岛分校
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above three modification methods have certain effects on improving the performance of tin-based oxide negative electrodes, but a single method cannot completely solve the above-mentioned key problems of tin-based negative electrode materials

Method used

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  • A negative electrode material for pyrolytic carbon battery embedded with tin-based oxide and its preparation method
  • A negative electrode material for pyrolytic carbon battery embedded with tin-based oxide and its preparation method
  • A negative electrode material for pyrolytic carbon battery embedded with tin-based oxide and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] A pyrolytic carbon battery negative electrode material embedded with tin-based oxide, the material is composited by carbon-coated nano-tin-based oxide particles and pyrolytic carbon, and the carbon-coated nano-tin-based oxide particles are evenly embedded in the Embedded on pyrolytic carbon. The particle diameter of the nano-tin-based oxide particles is 2-5 nm. The thickness of the carbon coating layer is 1-5 nm. The pyrolytic carbon is a three-dimensional porous network carbon structure.

[0053] A preparation method of a pyrolytic carbon battery negative electrode material embedded with a tin-based oxide, comprising the following steps:

[0054] Step 1, Mix and Dry:

[0055] (1) Dissolve NaCl (20.64g), citric acid (2.5g), stannous chloride (0.244g), and cobalt nitrate (0.322g) with 75mL of deionized water, and the magnetic stirring time is 8h to obtain a solution;

[0056] (2) Freeze the solution in a refrigerator at -15°C, and after completely freezing, use a fre...

Embodiment 2

[0066] A pyrolytic carbon battery negative electrode material embedded with tin-based oxide, the material is composited by carbon-coated nano-tin-based oxide particles and pyrolytic carbon, and the carbon-coated nano-tin-based oxide particles are evenly embedded in the Embedded on pyrolytic carbon. The particle diameter of the nano-tin-based oxide particles is 2-5 nm. The thickness of the carbon coating layer is 1-5 nm. The pyrolytic carbon is a three-dimensional porous network carbon structure.

[0067] A preparation method of a pyrolytic carbon battery negative electrode material embedded with a tin-based oxide, comprising the following steps:

[0068] Step 1, Mix and Dry:

[0069] (1) NaCl (20.7g), citric acid (2.5g), stannous chloride (0.185g), and copper nitrate (0.234g) were dissolved in 75mL of deionized water, and the magnetic stirring time was 10h to obtain a solution;

[0070] (2) Freeze the solution in a refrigerator at -15 °C, and after completely freezing, use...

Embodiment 3

[0080] A pyrolytic carbon battery negative electrode material embedded with tin-based oxide, the material is composited by carbon-coated nano-tin-based oxide particles and pyrolytic carbon, and the carbon-coated nano-tin-based oxide particles are evenly embedded in the Embedded on pyrolytic carbon. The particle diameter of the nano-tin-based oxide particles is 2-5 nm. The thickness of the carbon coating layer is 1-5 nm. The pyrolytic carbon is a three-dimensional porous network carbon structure.

[0081] A preparation method of a pyrolytic carbon battery negative electrode material embedded with a tin-based oxide, comprising the following steps:

[0082] Step 1, Mix and Dry:

[0083] (1) NaCl (20.64g), citric acid (2.5g), stannous chloride (0.24g) and nickel nitrate (0.36g) were dissolved in 75mL deionized water, and the magnetic stirring time was 5h to obtain a solution;

[0084] (2) Freeze the solution in a refrigerator at -15 °C, and after completely freezing, use a fre...

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Abstract

A pyrolytic carbon battery negative electrode material embedded with tin-based oxide and a preparation method thereof, belonging to the technical field of battery negative electrode materials; the material is composed of carbon-coated nano tin-based oxide particles and pyrolytic carbon The coated nano-tin-based oxide particles are uniformly embedded on the pyrolytic carbon; the particle diameter is 2-5nm; the thickness of the carbon coating layer is 1-5nm; the pyrolytic carbon is a three-dimensional porous network Carbon structure; preparation method: 1) Mix NaCl: carbon source: tin source: soluble salt that can form an alloy with tin, dissolve with deionized water, magnetically stir and completely freeze, then vacuum dry; 2) cool after heat treatment 3) washing, filtering and drying the powder; immersing in acid; 4) drying to obtain a battery composite negative electrode material embedded with tin-based oxide. The battery composite negative electrode material of the present invention is tested at 50~2000mA g in the potassium ion half-cell test. ‑1 Under the current density, the first charge reversible capacity is 300~500mAh g ‑1 , after 20-100 cycles, the capacity is 150-290mAh g ‑1 .

Description

technical field [0001] The invention belongs to the technical field of battery negative electrode materials, and relates to a potassium ion battery negative electrode material technology, in particular to a pyrolytic carbon battery negative electrode material embedded with tin-based oxides and a preparation method thereof. Background technique [0002] The development of sustainable energy alternatives, including renewable energy resources and sustainable storage technologies, plays a vital role in addressing global concerns about energy demand and traditional fossil fuels and growing environmental concerns. Electric vehicles and smart grids also place significant demand on renewable energy resources. Therefore, there are great concerns about the cost and limited resources of lithium-ion batteries, especially large-scale energy storage needs to consume a large amount of lithium resources. Potassium-ion batteries have low negative redox potential K / K + (-2.93V), indicating ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/48H01M4/62H01M10/054
CPCH01M4/366H01M4/483H01M4/625H01M4/628H01M10/054H01M2004/021H01M2004/027Y02E60/10
Inventor 王志远董康泽罗绍华刘延国王庆张亚辉郝爱民
Owner 东北大学秦皇岛分校
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