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Manganese dioxide nano-rod composite electrode and preparation method and application thereof

A technology of manganese dioxide and composite electrodes, which is applied in the field of electrochemistry, can solve problems such as difficulty in achieving the synergistic effect of composite materials, complicated preparation process, and limited effect, and achieve improved electronic conductivity, simple and clean preparation process, and improved utilization. rate effect

Inactive Publication Date: 2016-08-17
CENT SOUTH UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among these electrochemical preparation methods, the first method involves the melting or electrodeposition of alloys, the preparation process is complicated, and the energy consumption is also high.
The second method mainly prepares composite materials in the form of layer composites, and the electrochemical reaction mainly occurs at the electrode / solution interface, so the material of the surface layer plays a leading role in this type of composite material, and the material of the bottom layer is due to The role played by not participating in the electrochemical reaction is limited, so it is difficult to achieve the synergistic effect between different components in the composite material

Method used

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  • Manganese dioxide nano-rod composite electrode and preparation method and application thereof
  • Manganese dioxide nano-rod composite electrode and preparation method and application thereof

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preparation example Construction

[0029] Compared with the existing preparation technology, the technical idea and process principle of the present invention have significant characteristics and technical advantages:

[0030] In order to prepare supercapacitor electrode materials that can meet the actual needs, compounding different transition metal oxides is one of the main methods adopted by the industry. The specific method of compounding includes chemical method and electrochemical method. The chemical method is mainly to dissolve different transition metal salts and add a precipitant to the mixed solution to prepare the corresponding composite hydroxide. Finally, the obtained composite hydroxide is calcined. That is, a composite oxide powder material is obtained. Composite oxide materials can also be directly obtained by subjecting different transition metal salts to hydrothermal treatment. When preparing electrodes, these powder materials and binders must be formulated into slurry and then coated on the...

specific Embodiment approach

[0035] A manganese dioxide nanorod composite electrode, comprising a current collector material and a manganese dioxide nanorod composite material attached to the current collector material, the diameter of the manganese dioxide nanorod in the composite material is 5 to 50 nm, and the length is 0.5 nm. ~2μm, nickel or cobalt oxides are embedded in the gaps formed by manganese dioxide nanorods, and there is no binder in the entire electrode.

[0036] The preparation method of above-mentioned manganese dioxide nanorod composite electrode comprises the following steps:

[0037] (1) Prepare a mixed aqueous solution containing manganese sulfate, sodium sulfate, nickel sulfate and (or) cobalt sulfate, and the mixed solution also contains a structure-directing agent substance.

[0038] (2) Use stainless steel or carbon fiber paper, carbon cloth, etc. as current collectors, use the current collector material after surface cleaning as an anode, and use the above-mentioned mixed aqueous...

Embodiment 1

[0044] A manganese dioxide nanorod composite electrode, comprising a current collector material and a manganese dioxide nanorod composite material attached to the current collector material, the manganese dioxide nanorods in the composite material have a diameter of 30-50 nm and a length of 0.7 ~1 μm, nickel or cobalt oxides are embedded in the gaps formed by manganese dioxide nanorods, and there is no binder in the entire electrode.

[0045] The preparation method of above-mentioned manganese dioxide nanorod electrode, comprises the following steps:

[0046] (1) Weigh a certain amount of MnSO 4 ·H 2 O, sodium n-butyrate, NiSO 4 ·7H 2 O, Na 2 SO 4 Dissolve in deionized water to form a mixed solution, and prepare a mixed solution containing 0.01 mol / L of manganese sulfate, 0.1 mol / L of sodium n-butyrate, 1 mol / L of nickel sulfate and 0.5 mol / L of sodium sulfate. ,

[0047] (2) Cut the 304 stainless steel foil into an area of ​​4×1cm 2 The stainless steel belt is used as...

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Abstract

The invention discloses a manganese dioxide nano-rod composite electrode. The manganese dioxide nano-rod composite electrode comprises a current collector and a manganese dioxide nano-rod composite material attached to the current collector. The manganese dioxide nano-rod composite material comprises oxide of nickel and / or oxide of cobalt. The manganese dioxide nano-rod composite electrode does not contain an adhesive. A preparation method of the manganese dioxide nano-rod composite electrode includes the steps that manganese sulfate, sodium sulfate, nickel sulfate or cobaltous sulfate and a structure-directing agent are weighed, deionized water is added, and a mixed water solution is obtained; the mixed water solution is used as an electrolyte for electro-deposition; after electro-deposition is completed, drying is conducted, and the manganese dioxide nano-rod composite electrode containing oxide of nickel and / or oxide of cobalt is obtained. The manganese dioxide nano-rod composite electrode can be used for manufacturing an electrochemical supercapacitor and has the advantages of being large in overall energy density, simple in preparation process and the like.

Description

technical field [0001] The invention relates to the technical field of electrochemistry, and more specifically relates to a manganese dioxide nanorod composite electrode and a preparation method and application thereof. Background technique [0002] Electrochemical supercapacitors (ES), also known as electrochemical capacitors (EC), or simply supercapacitors (supercapacitors, ultracapacitors), are new energy storage devices that have attracted widespread attention in recent years. Because supercapacitors store energy by electrochemical reactions on the interface between electrodes and solutions or electric double layers, their capacity is 20 to 200 times that of traditional capacitors, reaching farads or even thousands of farads; their power density is several times higher than that of batteries. Ten times, it can meet the needs of high power output such as electric vehicle start-up acceleration, and has broad market prospects in urban rail transit and other fields that requ...

Claims

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Application Information

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IPC IPC(8): H01G11/46H01G11/86B82Y30/00
CPCY02E60/13H01G11/46B82Y30/00H01G11/86
Inventor 陈亚孔令坤陈白珍石西昌杨喜云徐徽
Owner CENT SOUTH UNIV
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