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Preparation method of nitrogen and oxygen co-doped carbon nanofiber material, product and application

A carbon nanofiber and co-doping technology, which is applied in the field of nanomaterials, can solve the problems of time-consuming, complicated preparation methods, restrictions on the commercial application of nitrogen and oxygen co-doped carbon nanofiber materials, and achieve simplified preparation methods and shapes. The effect of uniform appearance and stable structure

Active Publication Date: 2021-03-30
ANHUI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The patent application with the publication number CN109802151A discloses a carbon nanoparticle-modified nitrogen-doped 3D porous carbon material and its preparation and application. During the preparation process, a complex process is required to treat the oxygen-doped carbon material with ammonia at high temperature. The preparation method is complex and time-consuming, which limits the commercial application of nitrogen and oxygen co-doped carbon nanofiber materials

Method used

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  • Preparation method of nitrogen and oxygen co-doped carbon nanofiber material, product and application
  • Preparation method of nitrogen and oxygen co-doped carbon nanofiber material, product and application
  • Preparation method of nitrogen and oxygen co-doped carbon nanofiber material, product and application

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Effect test

Embodiment 1

[0052] The preparation of nitrogen and oxygen co-doped carbon nanofiber material specifically comprises the following steps:

[0053] (1) At room temperature, add 1.2 g of manganese chloride and 0.9 g of nitrilotriacetic acid into 30 mL of isopropanol, stir magnetically for 10 minutes, then add 10 mL of deionized water and stir magnetically for 30 minutes to form Clear solution. The above solution was transferred to a 50mL stainless steel reaction kettle and sealed. The reaction kettle was placed in an oven, heated at 180°C for 6 hours, washed with water and ethanol three times, and dried in an oven at 60°C for 6 hours to obtain a white precursor.

[0054] (2) The above precursors were then placed in a tube furnace fed with nitrogen, calcined at 600°C, 700°C and 800°C for 2 hours, and cooled naturally to room temperature to prepare ultrafine MnO nanoparticles embedded with nitrogen-doped porous carbon. crystal (MnO@NC), finally, the dried sample was etched with 3mol / L hydroc...

Embodiment 2

[0063] Adopt the nitrogen and oxygen co-doped carbon nanofiber material in embodiment 1 to prepare potassium ion battery negative electrode material, specifically comprise the following steps:

[0064] Mix nitrogen and oxygen co-doped carbon nanofiber materials with acetylene black and polyvinylidene fluoride PVDF in a mass ratio of 80:10:10 to make a slurry, and then coat the slurry on a copper foil at 80°C After drying in a special oven, the copper foil is cut into a circular electrode sheet with a diameter of 14mm, which is the negative electrode material of the lithium-ion battery.

Embodiment 3

[0066] Potassium ion battery is prepared by adopting the negative electrode material of potassium ion battery in Example 2, specifically comprising the following steps:

[0067] The electrode sheet in Example 1 is used as the positive electrode, and the circular metal potassium sheet with a diameter of 14mm is used as the negative electrode, and the mixture containing ethylene carbonate EC and diethyl carbonate DEC in a mass ratio of 1:1 is composed of A mixed solution of 3mol / L difluorosulfonimide potassium salt KFSI was used as the electrolyte, and a circular polypropylene film with a diameter of 16mm was used as a diaphragm, and a button cell was assembled in a glove box protected by an argon atmosphere as a test Battery.

[0068] Test it with a battery test system for a Neware BTS-610.

[0069] Determination result: if Figure 8 It is shown that at a current density of 100mA / g, after 200 cycles, the discharge capacity remains at 553.99mAh / g; as Figure 9 As shown, the d...

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Abstract

The invention discloses a preparation method of a nitrogen and oxygen co-doped carbon nanofiber material, and relates to the technical field of nano materials. The preparation method comprises the following steps of (1) preparing a precursor; and (2) putting the precursor into a tubular furnace filled with nitrogen, respectively calcining at 600-800 DEG C for 2 hours, naturally cooling to room temperature to obtain MnO nanocrystals embedded with nitrogen-doped porous carbon, finally etching the sample with a 3mol / L hydrochloric acid solution for 3 hours, and washing to obtain the nitrogen-oxygen co-doped carbon nanofiber material. The invention also provides a product prepared by the preparation method and an application thereof. The beneficial effects of the present invention are that thepreparation process is simple and efficient, is safe and easy to implement and is short in synthesis period and is expected to be popularized and industrially produced, and the prepared nanofiber material has a loose and porous composite structure.

Description

technical field [0001] The invention relates to the technical field of nanomaterials, in particular to a preparation method, product and application of a nitrogen and oxygen co-doped carbon nanofiber material. Background technique [0002] With the rapid consumption of global energy and the increasingly serious environmental crisis, people have been committed to the development of sustainable, clean and renewable energy. However, renewable energy sources are intermittent in nature, causing variations in energy harvest and demand in terms of time and space. Therefore, stationary energy storage systems play a key role in increasing the effectiveness and efficiency of renewable energy. In recent years, rechargeable lithium-ion batteries have attracted extensive attention due to their high energy density, high power density, good cycle stability, and eco-friendliness. Co 3 o 4 Since as the anode material of lithium battery, the majority of researchers continue to explore var...

Claims

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Application Information

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IPC IPC(8): H01M4/62H01M4/587H01M4/133H01M4/1393H01M10/0525B82Y30/00B82Y40/00
CPCH01M4/587H01M4/624H01M4/133H01M4/1393H01M10/0525B82Y30/00B82Y40/00H01M2004/027H01M2004/022H01M2004/021Y02E60/10
Inventor 郑方才储开念王俊中
Owner ANHUI UNIVERSITY
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