Manganese dioxide/carbon paper composite electrode material and preparation method thereof

A manganese dioxide and composite electrode technology, which is applied in the manufacture of hybrid capacitor electrodes, hybrid/electric double layer capacitors, etc., can solve the problems of unstable structure and poor rate performance, and achieve improved cycle life, improved conductivity, and low raw material cost Effect

Active Publication Date: 2017-01-25
ADVANCED TECHNOLOGY & MATERIALS CO LTD
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  • Abstract
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Problems solved by technology

[0004] In view of the deficiencies in the prior art, one of the purposes of the present invention is to provide a manganese dioxide / carbon paper composite electrode material and a preparation method thereof. Manganese nanosheets grow on the surface of carbon paper to prepare a manganese dioxide / carbon paper composite material. The preparation method is simple, fast, and can be mass-produced; the above-mentioned composite material has controllable size, regular shape, and good electrochemical performance. In particular, the high capacitance and good cycle performance solve the technical problems of unstable structure and poor rate performance in the prior art, and are especially suitable for supercapacitor materials; in addition, due to the good flexibility and processability of carbon paper current collectors, the above oxidation Manganese / carbon paper composites can be applied to flexible devices

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  • Manganese dioxide/carbon paper composite electrode material and preparation method thereof
  • Manganese dioxide/carbon paper composite electrode material and preparation method thereof
  • Manganese dioxide/carbon paper composite electrode material and preparation method thereof

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Embodiment 1

[0042] This embodiment provides a manganese oxide / carbon paper composite electrode material, the specific preparation method is as follows:

[0043] (1) Take 0.045g of potassium permanganate and 0.05g of ammonium fluoride respectively, add them to 50ml of deionized water, stir for 3 hours to form a transparent solution, and obtain a mixed system;

[0044] (2) will 2cm 2 Soak the carbon paper substrate into the mixed system obtained in step (1), and react at 30°C for 24 hours to obtain the reaction product;

[0045] (3) The reaction product obtained in step (2) was alternately washed three times with absolute ethanol and distilled water, and dried at 80° C. for 16 hours to obtain the manganese oxide / carbon paper composite electrode material.

[0046] figure 1 The scanning electron microscope (SEM) figure of the manganese oxide / carbon paper composite electrode material prepared for the present embodiment, as can be seen from the figure, the morphology of manganese oxide is a n...

Embodiment 2

[0048] This embodiment provides a manganese oxide / carbon paper composite electrode material, the specific preparation method is as follows:

[0049] (1) Take 4g of potassium permanganate and 5g of ammonium fluoride respectively, add them to 50ml of deionized water, stir for 3 hours and form a transparent solution to obtain a mixed system;

[0050] (2) will 2cm 2 Soak the carbon paper substrate into the mixed system obtained in step (1), and react at 30°C for 24 hours to obtain the reaction product;

[0051] (3) The reaction product obtained in step (2) was alternately washed three times with absolute ethanol and distilled water, and dried at 80° C. for 16 hours to obtain the manganese oxide / carbon paper composite electrode material.

[0052] In the manganese oxide / carbon paper composite electrode material prepared in this example, the appearance of the manganese oxide is nanosheets with a uniform size, a length of 150-200 nm, and a thickness of 10 nm. The X-ray diffraction (...

Embodiment 3

[0054] This embodiment provides a manganese oxide / carbon paper composite electrode material, the specific preparation method is as follows:

[0055] (1) Take 0.045g of potassium permanganate and 0.05g of ammonium fluoride respectively, add them to 50ml of deionized water, stir for 3 hours to form a transparent solution, and obtain a mixed system;

[0056] (2) will 2cm 2 Soak the carbon paper substrate into the mixed system obtained in step (1), and react at 30°C for 48 hours to obtain the reaction product;

[0057] (3) The reaction product obtained in step (2) was alternately washed three times with absolute ethanol and distilled water, and dried at 80° C. for 16 hours to obtain the manganese oxide / carbon paper composite electrode material.

[0058] figure 2 The scanning electron microscope (SEM) figure of the manganese oxide / carbon paper composite electrode material prepared for the present embodiment, as can be seen from the figure, the morphology of manganese oxide is a ...

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Abstract

The invention relates to a manganese dioxide/carbon paper composite electrode material and a preparation method thereof, belonging to the technical field of a super-capacitor electrode material. The material adopts carbon paper as a matrix (a current collector), a manganese dioxide nano sheet is attached to the surface of the carbon paper, the length of the manganese dioxide nano sheet is 150 to 200 nm, and the thickness of the manganese dioxide nano sheet is 5 to 15 nm. The preparation method comprises the following steps of: firstly sufficiently and uniformly mixing potassium permanganate, ammonium fluoride and deionized water according to a given ratio to obtain a mixed system, immersing the carbon paper in the mixed system, performing the reaction, and finally washing and drying a reaction product. The preparation method is simple, rapid and capable of realizing the mass production; the obtained composition material is controllable in size, regular in shape, good in electrochemical performance, particularly high in capacitance and good in cycling performance, the solves the technical problems of the prior art that the structure is unstable and the multiplying power performance is poor, and is particularly suitable for a super-capacitor material; in addition, the composite material can also be applied to a flexible device.

Description

technical field [0001] The invention relates to a flexible supercapacitor electrode material and a preparation method thereof, in particular to a manganese dioxide / carbon paper composite electrode material and a preparation method thereof, belonging to the technical field of supercapacitor electrode materials. Background technique [0002] Supercapacitor is a new type of energy storage device, which has the characteristics of short charging time, long service life, good temperature characteristics, energy saving and environmental protection. From the point of view of the energy storage mechanism, supercapacitors are divided into double-layer capacitors and pseudocapacitors. The capacitance of electric double layer capacitors is based on the electric double layer capacitance generated by the charge separation on the electrode / electrolyte interface. The electrode materials are generally various carbonaceous materials. Commonly used carbon materials include activated carbon pow...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/28H01G11/46H01G11/86
CPCY02E60/13H01G11/28H01G11/46H01G11/86
Inventor 戚雯武英曾宏况春江周少雄
Owner ADVANCED TECHNOLOGY & MATERIALS CO LTD
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