Method for preparing MnO2 nano array through normal-temperature two-electrode electrodeposition and product thereof

A nano-array and electrodeposition technology, applied in the manufacture of hybrid/electric double layer capacitors, hybrid capacitor electrodes, etc., can solve the problems of high cost and complicated process, and achieve the effect of low cost, simple operation, and powerful effective surface area

Pending Publication Date: 2021-04-06
SHANGHAI UNIV OF ENG SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the relatively complex and high-cost defects of the prior art process, and provide a supercapacitor electrode material (MnO) with simple process and low cost. 2 Nanoarray) preparation method, in addition the preparation method of the present invention is also environmentally friendly and pollution-free

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  • Method for preparing MnO2 nano array through normal-temperature two-electrode electrodeposition and product thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Preparation of MnO by a two-electrode electrodeposition at room temperature 2 The method of nanometer array, its step is as follows:

[0028] First, dissolve 12.5505 g of Mn(NO 3 ) 2 4H 2 O solid adds a certain amount of deionized water and mixes to obtain 500ml0.1mol / L of Mn(NO 3 ) 2 aqueous solution; then, measure 8ml of Mn(NO 3 ) 2 The aqueous solution was mixed with 72ml deionized water and stirred to obtain 80ml 0.01mol / L of Mn(NO 3 ) 2 solution, pour it into the electrolytic tank, use carbon fiber as the positive and negative electrodes for electrolysis, and apply a voltage of 9V (positive and negative electrode voltage) to electrolyze it for 20 minutes; then use deionized water and absolute ethanol to alternately wash the negative electrode for 60 minutes; Dry at 100°C for 4h to get MnO deposited on the surface 2 Nanoarrays of carbon fibers.

[0029] The prepared surface was deposited with MnO 2 SEM images of carbon fibers in nanoarrays such as figure...

Embodiment 2

[0041] Preparation of MnO by a two-electrode electrodeposition at room temperature 2 The method of nanometer array, its step is as follows:

[0042] First, dissolve 12.5505 g of Mn(NO 3 ) 2 4H 2 O solid adds a certain amount of deionized water and mixes to obtain 500ml0.1mol / L of Mn(NO 3 ) 2 aqueous solution; then measure 16ml of Mn(NO 3 ) 2 The aqueous solution was mixed with 64ml deionized water and stirred to obtain 80ml 0.02mol / L of Mn(NO 3 ) 2 Solution, pour it into the electrolytic tank, use carbon fiber as the positive and negative electrodes for electrolysis, apply 12V voltage (positive and negative electrode voltage) to electrolyze it for 40min; then use deionized water and absolute ethanol to wash the negative electrode alternately for 10min; finally in Dry at 80°C for 2h to get MnO deposited on the surface 2 Nanoarrays of carbon fibers.

Embodiment 3

[0044] Preparation of MnO by a two-electrode electrodeposition at room temperature 2 The method of nanometer array, its step is as follows:

[0045] First, dissolve 12.5505 g of Mn(NO 3 ) 2 4H 2 O solid adds a certain amount of deionized water and mixes to obtain 500ml0.1mol / L of Mn(NO 3 ) 2 aqueous solution; then measure 8ml of Mn(NO 3 ) 2 Mix and stir the aqueous solution with 64ml deionized water and 8ml DMSO to obtain 80ml 0.01mol / L Mn(NO 3 ) 2 Solution, pour it into the electrolytic tank, use carbon fiber as the positive and negative electrodes for electrolysis, apply 9V voltage (positive and negative electrode voltage) to electrolyze it for 30min; then use deionized water and absolute ethanol to wash the negative electrode alternately for 1min; finally in Dry at 100°C for 4h to get MnO deposited on the surface 2 Nanoarrays of carbon fibers.

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Abstract

The invention discloses a method for preparing a MnO2 nano array by normal-temperature two-electrode electrodeposition and a product thereof. The preparation method comprises steps that a Mn(NO3)2 solution is used as an electrolyte, carbon fibers are used as a positive electrode and a negative electrode for electrolysis, and the negative electrode is the carbon fibers with the MnO2 nano array deposited on the surface after the electrolysis is finished. The electrolysis is carried out by a two-electrode method, the voltage between the positive electrode and the negative electrode is 5-20 V, and the electrolysis time is 10-100 min. Ultrathin flaky MnO2 of a mosaic structure is densely distributed on the surface of the carbon fiber. The preparation method disclosed by the invention is simple to operate, does not need a reference electrode or complex equipment, is low in cost, and is non-toxic and pollution-free to the environment; the product has an ultrathin structure, the ultrathin flaky MnO2 is densely distributed on the surface of the carbon fiber, and the product has a strong effective surface area, is beneficial to energy storage, has excellent electricity storage performance and has a great application prospect.

Description

technical field [0001] The invention belongs to the technical field of preparation of electrode materials for supercapacitors, and relates to the preparation of MnO by two-electrode electrodeposition at room temperature 2 Nanoarray methods and products thereof. Background technique [0002] Supercapacitor refers to a new type of energy storage device between traditional capacitors and rechargeable batteries. It not only has the characteristics of fast charging and discharging of capacitors, but also has the energy storage characteristics of batteries. Due to its high power density, long cycle life, wide operating temperature limit, maintenance-free and environmental protection, supercapacitors are now more and more widely used in various fields. [0003] For supercapacitors, the electrode material is one of the key factors affecting the performance and production cost of supercapacitors. Metal oxide materials have become a commonly used supercapacitor due to their high spe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/86H01G11/24H01G11/40H01G11/46
CPCH01G11/86H01G11/46H01G11/24H01G11/40Y02E60/13
Inventor 范钰铭李文尧郭鑫刘珺臣刘珩
Owner SHANGHAI UNIV OF ENG SCI
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