Method for preparing titanium oxide nanotube/carbon/manganese oxide composite material by employing electrochemical reduction method

A technology of titanium oxide nanotubes and composite materials, which is applied in the field of preparing supercapacitor composite materials, can solve the problems of small capacitor capacity, achieve the effects of reducing resistance, high capacitance performance, and increasing electric double layer capacitance

Inactive Publication Date: 2016-12-07
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the titanium oxide nanotube composite material prepared by the existing method has a small capacitor capacity, and to provide a method for preparing titanium oxide nanotube / carbon / manganese oxide composite material by electrochemical reduction

Method used

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  • Method for preparing titanium oxide nanotube/carbon/manganese oxide composite material by employing electrochemical reduction method
  • Method for preparing titanium oxide nanotube/carbon/manganese oxide composite material by employing electrochemical reduction method
  • Method for preparing titanium oxide nanotube/carbon/manganese oxide composite material by employing electrochemical reduction method

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specific Embodiment approach 1

[0027] Specific embodiment one: this embodiment is a kind of method that utilizes electrochemical reduction method to prepare titanium oxide nanotube / carbon / manganese oxide composite material and is finished according to the following steps:

[0028] A three-electrode system is composed of titanium oxide nanotubes loaded with carbon on the surface, Pt electrode and saturated calomel electrode. Potassium permanganate solution of 0.02mol / L~0.1mol / L; CHI660D electrochemical workstation was used to conduct chemical deposition by constant potential deposition method to obtain titanium oxide nanotube / carbon / manganese oxide composite material;

[0029] The low voltage of the constant potential deposition method is -0.10V~-0.20V, the high voltage is 0.7V~0.9V, the scanning rate is 20mV / s~200mV / s, and the number of cycles is 10~500 times.

[0030] The principle of this implementation mode:

[0031] 1. In this embodiment, carbon is loaded on the titanium dioxide nanotubes, which can re...

specific Embodiment approach 2

[0036]Embodiment 2: The difference between this embodiment and Embodiment 1 is that the titanium oxide nanotubes with carbon on the surface are completed according to the following steps:

[0037] 1. Preparation of titanium dioxide nanotubes by anodic oxidation method:

[0038] ①. Use 120#SiC sandpaper, 1000#SiC sandpaper and 2000#SiC sandpaper to polish the titanium sheet in sequence to obtain a titanium sheet with a bright surface;

[0039] ②. Use absolute ethanol and acetone to clean the titanium sheet with bright surface for 3 to 5 times respectively to obtain the treated titanium sheet;

[0040] 2. Add the electrolyte solution into the inorganic glass electrolytic cell, connect the treated titanium sheet to the positive pole of the power supply as the anode, and connect the copper sheet to the negative pole of the power supply as the cathode; use a DC power supply for power supply at a voltage of 18V React at ~22V for 80min~100min, take out the reacted titanium sheet;

...

specific Embodiment approach 3

[0046] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is: the low voltage of the constant potential deposition method is -0.15V, the high voltage is 0.8V, and the scan rate is 20mV / s~100mV / s, the number of cycles is 100 to 300 times. Other steps are the same as those in Embodiment 1 or 2.

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Abstract

The invention provides a method for preparing a titanium oxide nanotube/carbon/manganese oxide composite material by employing an electrochemical reduction method, relates to a method for preparing a composite material of a super capacitor, and aims at solving the problem that a titanium oxide nanotube composite material capacitor prepared by an existing method is low in capacity. The method comprises the steps of forming a three-electrode system by a titanium oxide nanotube with carbon loaded on the surface, a Pt electrode and a saturated calomel electrode; and utilizing a CHI660D electrochemical workstation and carrying out chemical deposition by employing a potentionstatic deposition method to obtain the titanium oxide nanotube/carbon/manganese oxide composite material. By the electrochemical reduction method, a layer of manganese oxide is deposited on the surface of the carburized titanium oxide nanotube to prepare the titanium oxide nanotube/carbon/manganese oxide composite material. Compared with a TiO2NT/C composite material, the titanium oxide nanotube/carbon/manganese oxide composite material has higher capacitive performance. The titanium oxide nanotube/carbon/manganese oxide composite material can be obtained.

Description

technical field [0001] The invention relates to a method for preparing supercapacitor composite materials. Background technique [0002] The most promising electrical energy storage devices in modern society should be supercapacitors and batteries. As we all know, compared with batteries, supercapacitors have the advantages of fast charging and discharging and long service life. TiO 2 It is a common wide bandgap semiconductor, its physicochemical stability, non-toxic, cheap and good photoresponse, one-dimensional nanostructure TiO 2 Due to its large specific surface area, it is beneficial to the charge transfer and electrical energy storage in the electrochemical process, and overcomes the problem of nano-TiO 2 The weak point that the powder is easy to agglomerate, thus exhibiting excellent electrochemical performance. Anodized TiO 2 Nanotube arrays can provide a large surface area while maintaining a highly oriented pore structure, such that some highly regular pore str...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/86H01G11/30H01G11/46H01G11/24C25B1/00C25B1/21
CPCY02E60/13H01G11/86C25B1/00C25B1/21H01G11/24H01G11/30H01G11/46
Inventor 姚忠平刘冠杰赵娅靖夏琦兴王建康李东琦姜兆华
Owner HARBIN INST OF TECH
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