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Preparation method of manganic manganous oxide/ carbon matrix composite nanoelectrode material

A technology of trimanganese tetraoxide and nano-electrode, which is applied in the manufacture of hybrid capacitor electrodes and hybrid/electric double-layer capacitors, etc., can solve the problems affecting the specific capacitance and energy density of supercapacitors, and the increase of internal resistance of electrode materials, so as to improve the electric capacity. Chemical properties, improved electrical conductivity and stability, good electrical conductivity

Inactive Publication Date: 2015-09-02
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of an insulating binder will lead to an increase in the internal resistance of the electrode material, affecting the specific capacitance and energy density of the supercapacitor.

Method used

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  • Preparation method of manganic manganous oxide/ carbon matrix composite nanoelectrode material
  • Preparation method of manganic manganous oxide/ carbon matrix composite nanoelectrode material
  • Preparation method of manganic manganous oxide/ carbon matrix composite nanoelectrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1: The carbonization heating rate is 1° C. / min.

[0022] Weigh 0.6g of manganese acetate and put it into 18g of N,N-dimethylformamide, stir and dissolve, weigh 2g of polyacrylonitrile into the dissolved solution, stir until the solution is transparent and clear, and obtain spinning solution. The spinning solution is electrospun under the conditions that the spinning voltage is 15kV, the receiving distance is 20cm, the flow rate of the spinning solution is 0.1mm / min, and the inclination angle of the injector is 15°, and the fiber diameter is (500-800) nm 30% Mn / PAN composite nanofibers, the fiber was heated up to 280°C at a heating rate of 5°C / min, pre-oxidized in air, kept at a constant temperature for 1h, and the pre-oxidized fiber was heated at a heating rate of 1°C / min The temperature was raised to 1000° C., carbonization was carried out in nitrogen, and the temperature was kept constant for 1 hour to obtain Mn / C composite nanofibers with a diameter of (300-...

Embodiment 2

[0024] Example 2: The carbonization heating rate is 3° C. / min.

[0025] Weigh 1.2g of manganese acetate and put it into 36g of N,N-dimethylformamide. After stirring and dissolving, weigh 4g of polyacrylonitrile into the dissolved solution, stir until the solution is transparent and clear, and obtain spinning solution. The spinning solution is electrospun under the condition that the spinning voltage is 18kV, the receiving distance is 20cm, the flow rate of the spinning solution is 0.15mm / min, and the inclination angle of the injector is 15°, and the fiber diameter is (600-800) nm of 30% Mn / PAN composite nanofibers, the fiber was heated up to 280°C at a heating rate of 5°C / min, pre-oxidized in air, kept at a constant temperature for 1.5h, and the pre-oxidized fiber was heated at a rate of 3°C / min The temperature was raised to 1000° C., carbonized in nitrogen, and kept at a constant temperature for 1.5 hours to obtain Mn / C composite nanofibers with a diameter of (350-450) nm. ...

Embodiment 3

[0027] Example 3: The carbonization heating rate is 5° C. / min.

[0028] Weigh 0.6g of manganese acetate and put it into 18g of N,N-dimethylformamide, stir and dissolve, weigh 2g of polyacrylonitrile into the dissolved solution, stir until the solution is transparent and clear, and obtain spinning solution. The spinning solution is electrospun under the condition that the spinning voltage is 20kV, the receiving distance is 20cm, the flow rate of the spinning solution is 0.2mm / min, and the inclination angle of the injector is 15°, and the obtained fiber diameter is (500-700) nm of 30% Mn / PAN composite nanofibers, the fiber was heated up to 280°C at a heating rate of 5°C / min, pre-oxidized in air, and kept at a constant temperature for 2 hours, and the pre-oxidized fiber was heated at a heating rate of 5°C / min The temperature was raised to 1000° C., carbonization was carried out in nitrogen, and the temperature was kept constant for 2 hours to obtain Mn / C composite nanofibers wit...

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Abstract

The invention discloses a preparation method of a manganic manganous oxide / carbon matrix composite nanoelectrode material. The method comprises the following steps: preparing a spinning solution by taking polyacrylonitrile (PAN) as a precursor, taking manganese acetate as an additive, and taking N,N-dimethyl formamide as a solvent; preparing a Mn / PAN composite nanofiber via an electrostatic spinning method; and performing drying, pre-oxidation and carbonization of the obtained fiber to obtain the manganic manganous oxide / carbon composite nanofiber material. The method has advantages of simple process, high spinning controllability, and easy adjustable structure of the fiber, and the prepared manganic manganous oxide / carbon composite nanofiber material can be directly used as an electrode material of a super capacitor without adding a conductive agent or a binding agent. The obtained composite electrode is high in utilization ratio of an active material and mechanical strength, and relatively stable in chemical property, and is an ideal material for preparing the super capacitor.

Description

technical field [0001] The invention relates to a preparation method of trimanganese tetraoxide / carbon-based composite nano electrode material, in particular to a preparation method of a metal oxide and carbon material composite electrode material used for supercapacitors, and belongs to the field of preparation of nano electrode materials. technical background [0002] As a new type of energy storage device, supercapacitors have much higher specific capacitance and energy density than traditional capacitors, and have high power density and longer cycle life that ordinary batteries do not have. As a supporting or supplementary battery, it is widely used in smart grid, military, electric vehicles and other related fields. Among them, the electrode material, as the core component of the supercapacitor, is the key to determine the performance of the capacitor. At present, research on supercapacitors mainly focuses on the preparation and development of high-performance electrod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/86H01G11/36H01G11/46
CPCY02E60/13H01G11/86H01G11/36H01G11/46
Inventor 贾哲华万青董斌赵有华
Owner YANGZHOU UNIV
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