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Flower-like manganese dioxide electrode material for super-capacitor and preparation method thereof

A manganese dioxide electrode and supercapacitor technology, which is applied in capacitors, electrolytic capacitors, manganese oxide/manganese hydroxide, etc., can solve the problems of unsuitable supercapacitors, difficult to control the shape, long reaction time, etc., and achieve low cost, The method is simple and the effect of high specific capacity

Inactive Publication Date: 2012-10-17
CHINA FIRST AUTOMOBILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, manganese dioxide prepared by traditional chemical and physical methods usually takes a long time to react, the process is complicated, the shape is not easy to control, and cannot meet the requirements of supercapacitors. Therefore, it is necessary to explore a new preparation method

Method used

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  • Flower-like manganese dioxide electrode material for super-capacitor and preparation method thereof
  • Flower-like manganese dioxide electrode material for super-capacitor and preparation method thereof
  • Flower-like manganese dioxide electrode material for super-capacitor and preparation method thereof

Examples

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Effect test

Embodiment 1

[0015] Weigh 1.5g of potassium permanganate and 0.5g of hydrated manganese sulfate, and then dissolve them in deionized water to obtain 15ml and 5ml of solutions; under strong stirring, add the manganese sulfate solution to the potassium permanganate solution drop by drop for 5 minutes. The addition is completed; transfer the mixed solution to a hydrothermal reaction kettle until the filling rate is 80%, and conduct a hydrothermal reaction at 120°C for 2 hours to obtain a brown-black precipitate; wash with deionized water and dry at 80°C for 12 hours to obtain nano-sized manganese dioxide .

Embodiment 2

[0017] Weigh 0.5g of potassium permanganate and 0.5g of hydrated manganese sulfate, and then dissolve them in deionized water to obtain 15ml and 5ml of the solutions; under strong stirring, add the manganese sulfate solution to the potassium permanganate solution drop by drop for 10 minutes The addition is completed; transfer the mixed solution to a hydrothermal reaction kettle until the filling rate is 90%, hydrothermally react at 100°C for 3 hours to obtain a brown-black precipitate; wash with deionized water and dry at 80°C for 24 hours to obtain nano-sized manganese dioxide .

Embodiment 3

[0019] Weigh 0.5g of potassium permanganate and 1.5g of manganese acetate, and then dissolve them in deionized water to obtain 15ml and 5ml of solutions respectively; under strong stirring, add the manganese sulfate solution to the potassium permanganate solution dropwise for 15min Complete; transfer the mixed solution to a hydrothermal reaction kettle until the filling rate is 80%, and conduct a hydrothermal reaction at 160°C for 2 hours to obtain a brown-black precipitate; wash with deionized water and dry at 100°C for 12 hours to obtain nano-sized manganese dioxide.

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Abstract

The invention relates to a flower-like manganese dioxide electrode material for a super-capacitor and a preparation method thereof, and is characterized in that the preparation method comprises the following steps: respectively dissolving potassium permanganate and a manganous salt in deionized water; carrying out stirring for 10 to 30 min under the condition of strong stirring, adding a manganous salt solution into a potassium permanganate solution, wherein the molar ratio of the manganous salt to potassium permanganate is 1: 0.1-10, and transferring a mixed solution to a hydrothermal reaction kettle for a hydrothermal reaction so as to obtain a brownish black precipitate, with a filling rate being 50 to 95%, hydrothermal reaction temperature being 100 to 160 DEG C and hydrothermal reaction time being 2 to 3 hours; and carrying out rinsing with deionized water until a filtrate is colorless and drying a filter cake at a temperature of 40 to 160 DEG C for 1 to 48 hours so as to finally obtain flower-like manganese dioxide. According to the invention, flower-like manganese dioxide with a controllable crystal form and a controllable particle size is rapidly prepared by adopting a hydrothermal method; prepared manganese dioxide has a flower-like structure and a large specific surface area, and the utilization rate of manganese dioxide in a super-capacitor is increased.

Description

technical field [0001] The invention relates to a flower-shaped manganese dioxide electrode material for a supercapacitor and a preparation method thereof, belonging to the field of supercapacitor material preparation. Background technique [0002] Supercapacitor is a new type of energy storage device with the characteristics of large specific capacity, high power density, and long cycle life. It has higher power density than batteries, and has high current charging and discharging, short charging time, and high charging and discharging efficiency. characteristics. Therefore, supercapacitors have broad application prospects in fields such as electric vehicles, aerospace defense, and electronic communications. [0003] Supercapacitor materials can be divided into two categories according to the energy storage mechanism: one is the electric double layer material that uses the electric double layer mechanism to store energy, such as activated carbon, activated carbon fiber, ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G45/02B82Y40/00H01G9/042
CPCY02E60/13
Inventor 韩金磊荣常如张克金张斌魏晓川米新艳王丹
Owner CHINA FIRST AUTOMOBILE
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