Method for synthesizing black phosphate on carbon paper by one-step method and application of method

A technology of carbon paper and black phosphorus, applied in chemical instruments and methods, electrical components, electrochemical generators, etc., can solve the problems of high catalyst, low output, environmental pollution, etc., and achieve good electrochemical performance, small particles, good reversible effect

Inactive Publication Date: 2017-11-17
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the commonly used preparation method of black phosphorus is still the preparation method of high temperature and high pressure. Although black phosphorus can be successfully prepared, the output is relatively low, and the requi

Method used

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  • Method for synthesizing black phosphate on carbon paper by one-step method and application of method
  • Method for synthesizing black phosphate on carbon paper by one-step method and application of method
  • Method for synthesizing black phosphate on carbon paper by one-step method and application of method

Examples

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Comparison scheme
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Example Embodiment

[0022] Example 1:

[0023] A one-step method for synthesizing black phosphorus on carbon paper and its application specifically include the following steps:

[0024] S1. Weigh 5.0g of red phosphorus and evenly put it into the quartz boat, then put the quartz boat into the tube furnace, and then pass the argon protective gas into the tube furnace; heat the tube furnace to 180℃ at a constant speed, and heat 4h, perform annealing treatment;

[0025] S2, after annealing, prepare annealed samples, and cool them to room temperature for later use;

[0026] S3. Transfer the sample of S2 to a mortar and grind it for 40 minutes to obtain the required precursor red phosphorus for later use;

[0027] S4. Weigh 0.5g of the precursor red phosphorus prepared in S3, and evenly put it into the quartz boat, then put the blank carbon paper on the quartz boat, and then transfer it to the middle of the tube furnace;

[0028] S5. Pass the protective gas argon into the tube furnace, strictly control the flow ...

Example Embodiment

[0030] Example 2:

[0031] A one-step method for synthesizing black phosphorus on carbon paper and its application specifically include the following steps:

[0032] S1. Weigh 4.0g of red phosphorus and evenly put it into the quartz boat, then put the quartz boat into the tube furnace, and then pass the argon protective gas into the tube furnace; heat the tube furnace to 180℃ at a constant speed, and heat 2h, perform annealing treatment;

[0033] S2, after annealing, prepare annealed samples, and cool them to room temperature for later use;

[0034] S3. Transfer the sample of S2 to a mortar and grind it for 20 minutes to obtain the required precursor red phosphorus for later use;

[0035] S4. Weigh 0.4g of the precursor red phosphorus prepared in S3 and evenly put it into the quartz boat, then put the blank carbon paper on the quartz boat, and then transfer it to the middle of the tube furnace;

[0036] S5. Pass the protective gas argon into the tube furnace, strictly control the flow r...

Example Embodiment

[0037] Example 3:

[0038] A one-step method for synthesizing black phosphorus on carbon paper and its application specifically include the following steps:

[0039] S1. Weigh 6.0g of red phosphorus and evenly put it into the quartz boat, then put the quartz boat into the tube furnace, and then pass the argon protective gas into the tube furnace; heat the tube furnace to 250℃ at a constant speed, and heat 4h, perform annealing treatment;

[0040] S2, after annealing, prepare annealed samples, and cool them to room temperature for later use;

[0041] S3. Transfer the sample of S2 to a mortar and grind it for 60 minutes to obtain the required precursor red phosphorus for later use;

[0042] S4. Weigh 0.4g of the precursor red phosphorus prepared in S3 and evenly put it into the quartz boat, then put the blank carbon paper on the quartz boat, and then transfer it to the middle of the tube furnace;

[0043] S5. Pass the protective gas argon into the tube furnace, strictly control the flow r...

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Abstract

The invention relates to a method for synthesizing black phosphate on carbon paper by a one-step method and application of the method. The method mainly comprises the following steps of weighing a phosphate source, annealing and drying the phosphate source, taking a certain amount of a phosphate source precursor, uniformly placing the phosphate source precursor in a magnetic boat, arranging empty carbon paper on the magnetic boat, introducing a protection gas, rising a temperature at an uniform speed, performing heating, reducing the temperature to a room temperature at the uniform speed, and obtaining the black phosphate on the carbon paper. The black phosphate on the carbon paper is synthesized by a vapor deposition method, and the detects of high energy consumption caused by high temperature, high requirement on equipment, a special catalyst needed, relatively long synthesis time and the like in a traditional industrial high-temperature solid-phase synthesis method are overcome; moreover, the preparation method has the characteristics of simplicity, low cost and the like, is convenient to operate and is beneficial for industrial production; and through electrochemical performance and oxygen precipitation test, it is found out that the black phosphate on the carbon paper, synthesized by the method, has the advantages of high initial specific capacity, good cycle property and high-efficiency oxygen precipitation, and thus, the method is friendly to an application environment and is wide in market prospect.

Description

Technical field: [0001] The invention relates to the technical field of preparation of lithium-ion battery negative electrode materials and electrocatalytic materials for oxygen precipitation, and relates to a method for synthesizing black phosphorus, in particular to a method for synthesizing black phosphorus on carbon paper in one step and its application. Background technique: [0002] Phosphorus has at least 10 allotropes in nature, but its main forms are white phosphorus, red phosphorus, and black phosphorus. Unlike white phosphorus and red phosphorus, which are quite active, black phosphorus is the most stable form of phosphorus. The allotrope of the highest density (up to 2.69g / cm 3 ), it is difficult to dissolve in commonly used organic solvents, and chemical reactions are not easy to occur. Black phosphorus is a layered material in which individual atomic layers are held together by van der Waals interactions. Its composition resembles the interior of a single lay...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/38H01M4/587H01M10/0525B01J27/14B01J21/18
CPCB01J21/18B01J27/14H01M4/366H01M4/38H01M4/587H01M10/0525Y02E60/10
Inventor 姜倩倩李洁唐建国崔学伟张晓琳王新芝杨兰兰
Owner QINGDAO UNIV
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