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Preparation method of alpha-MnO2 nanorod array

A technology of nanorod arrays and carbon nanotubes, applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, etc., can solve problems such as poor conductivity, achieve controllable processes, increase the contact surface, and shorten the synthesis time.

Inactive Publication Date: 2019-12-10
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the α-MnO prepared by the existing method 2 The problem of poor electrical conductivity, the present invention provides a kind of α-MnO 2 Preparation method of nanorod array

Method used

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  • Preparation method of alpha-MnO2 nanorod array
  • Preparation method of alpha-MnO2 nanorod array
  • Preparation method of alpha-MnO2 nanorod array

Examples

Experimental program
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Embodiment 1

[0024] 1mmol KMnO 4 Dissolve in 40ml deionized water with 1M H 2 SO 4 Adjust the pH to 1, add a 3cm*3cm carbon cloth as the base material, and conduct a hydrothermal reaction at 100°C for 0.5h. After the reaction, the product is rinsed with deionized water and dried in an oven at 60°C to obtain α-MnO 2 nanorod arrays.

Embodiment 2

[0026] 2mmol KMnO 4 Dissolve in 40ml deionized water with 1M H 2 SO 4 Adjust the pH to 1, add a 3cm*3cm carbon cloth as the base material, and conduct a hydrothermal reaction at 120°C for 0.5h. After the reaction, the product is rinsed with deionized water and dried in an oven at 60°C to obtain α-MnO 2 nanorod arrays.

Embodiment 3

[0028] 4mmol KMnO 4 Dissolve in 40ml deionized water with 1M H 2 SO 4 Adjust the pH to 1, add a 3cm*3cm carbon cloth as the base material, and conduct a hydrothermal reaction at 140°C for 0.5h. After the reaction, the product is rinsed with deionized water and dried in an oven at 60°C to obtain α-MnO 2 nanorod arrays.

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Abstract

The invention discloses a preparation method of an alpha-MnO2 nanorod array. The method comprises steps of dissolving KMnO4 in the water, adjusting a pH value to 1-3 with dilute H2SO4, adding a substrate material, carrying out hydrothermal reaction at 100-140 DEG C, and after reaction completion, washing and drying to obtain the alpha-MnO2 nanorod array. A one-step hydrothermal method is adopted,the nanorod array material which is uniform, free of agglomeration, complete in crystallization, high in purity and controllable in morphology can be prepared. The alpha-MnO2 grows on a substrate, inlater application, the nanorod array structure can be directly used as electrodes of various electronic devices, reduction of the specific surface area and reduction of the electrochemical performanceof the nanomaterial caused by use of adhesives, conductive agents and the like are avoided, moreover, the contact surface of the material can be effectively increased through the nanorod array structure, and the material utilization rate is increased.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation and relates to a kind of MnO 2 The preparation method, specifically relates to a kind of α-MnO 2 Preparation methods of nanorod arrays. Background technique [0002] Supercapacitors (Supercapacitors), also known as Electrochemical Capacitors (Electrochemical Capacitors), usually have a power density that is 1 to 2 orders of magnitude higher than lithium-ion batteries, a cycle life that is 2 to 3 orders of magnitude higher, and 3 to 4 orders of magnitude higher than traditional capacitors. As a new, practical and efficient energy storage device, it has received extensive attention due to its excellent performance such as high energy density. The capacitive performance of supercapacitors depends on the performance of electrode materials. Compared with carbon materials, transition metal oxides have higher specific capacitance due to the existence of two or more oxidation states in...

Claims

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Application Information

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IPC IPC(8): H01G11/24H01G11/46H01G11/86
CPCH01G11/24H01G11/46H01G11/86Y02E60/13
Inventor 夏晖林宝伟房灵哲徐璟
Owner NANJING UNIV OF SCI & TECH
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