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A kind of mn3o4/tio2 nanotube composite material and preparation method thereof for supercapacitor

A composite material and nanotube technology, applied in the field of high specific capacitance Mn3O4/TiO2 nanotube composite material and its preparation, can solve the problems of low electrical conductivity, affecting practical application, small specific surface area, etc. Excellent capacitance characteristics, the effect of improving the specific surface area

Active Publication Date: 2018-05-01
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But since Mn 3 o 4 The disadvantages of small specific surface area and low conductivity seriously affect its practical application.

Method used

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  • A kind of mn3o4/tio2 nanotube composite material and preparation method thereof for supercapacitor
  • A kind of mn3o4/tio2 nanotube composite material and preparation method thereof for supercapacitor
  • A kind of mn3o4/tio2 nanotube composite material and preparation method thereof for supercapacitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Step 1, preparation of TiO by electrochemical anodic oxidation process 2 nanotube array

[0027] First add 0.4g NH 4 F dissolved in 5mL H 2 In O, after completely dissolving, add 95mL of ethylene glycol, and ultrasonically mix to obtain 2 O and NH 4The ethylene glycol solution of F; the cleaned high-purity titanium foil is used as an anode, and placed in the above-mentioned 2 O and NH 4 In the electrolytic cell of the ethylene glycol solution of F, the graphite electrode is used as the cathode, and the DC stabilized current power supply is used to oxidize TiO by applying a constant voltage of 40V for 4 hours. 2 nanotube array; the TiO 2 Nanotube arrays were immersed in ethylene glycol solution and ultrasonically cleaned at room temperature for 5 minutes to remove the 2 barrier on the surface of the nanotube array, followed by cleaning the surface with deionized water and blowing dry with nitrogen; the TiO 2 The nanotube array is placed in a muffle furnace and an...

Embodiment 2

[0032] Step 1, preparation of TiO by electrochemical anodic oxidation process 2 nanotube array

[0033] First add 0.5g NH 4 F dissolved in 6mL H 2 In O, after completely dissolving, add 94mL of ethylene glycol, and ultrasonically mix to obtain 2 O and NH 4 The ethylene glycol solution of F; the cleaned high-purity titanium foil is used as the anode, placed in the 2 O and NH 4 In the electrolytic cell of the ethylene glycol solution of F, the graphite electrode is used as the cathode, and the DC stabilized current power supply is used to oxidize TiO by applying a constant voltage of 50V for 5 hours. 2 nanotube array; the TiO 2 Nanotube arrays were immersed in ethylene glycol solution and ultrasonically cleaned at room temperature for 6 minutes to remove the 2 barrier on the surface of the nanotube array, followed by cleaning the surface with deionized water and blowing dry with nitrogen; the TiO 2 The nanotube array is placed in a muffle furnace and annealed in air at 4...

Embodiment 3

[0038] Step 1, preparation of TiO by electrochemical anodic oxidation process 2 nanotube array

[0039] First add 0.6g NH 4 F dissolved in 8mL H 2 In O, after completely dissolving, add 92mL of ethylene glycol, and ultrasonically mix to obtain 2 O and NH 4 The ethylene glycol solution of F; the cleaned high-purity titanium foil is used as the anode, placed in the 2 O and NH 4 In the electrolytic cell of the ethylene glycol solution of F, the graphite electrode is used as the cathode, and the DC stabilized current power supply is used to obtain TiO by applying a constant voltage of 55V for 6 hours. 2 nanotube array; the TiO 2 Nanotube arrays were immersed in ethylene glycol solution and ultrasonically cleaned for 8 minutes at room temperature to remove the 2 barrier on the surface of the nanotube array, followed by cleaning the surface with deionized water and blowing dry with nitrogen; the TiO 2 The nanotube array is placed in a muffle furnace and annealed in air at 50...

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Abstract

The invention relates to the fields of material science and electrochemical technology, in particular to a Mn3O4 / TiO2 nanotube composite material used for a supercapacitor and a preparation method thereof. In the method, a highly ordered TiO2 nanotube array is prepared through an electrochemical anodic oxidation process, and then a Mn3O4 / TiO2 nanotube composite material is synthesized in one step by using a chemical water bath deposition method with the TiO2 nanotube array film as a carrier. This Mn3O4 / TiO2 nanotube composite exhibits superior capacitive properties, with higher specific capacitance and longer cycle life.

Description

technical field [0001] The invention relates to the fields of material science and electrochemical technology, in particular to a high specific capacitance Mn for supercapacitors 3 o 4 / TiO 2 Nanotube composite material and preparation method thereof Background technique [0002] As people attach great importance to energy and environmental issues, the development of an environmentally friendly energy storage system with high efficiency and low pollution has become a global focus. As a new type of energy storage device, supercapacitors have attracted more and more attention from various countries due to their advantages such as high energy density and power density, fast charging, long cycle life, safety, reliability and low cost. Therefore, supercapacitors have very broad application prospects in transportation, electronic communications, energy environment, military defense and other fields. [0003] Transition metal oxides, due to their high specific capacitance and f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/24H01G11/46H01G11/86
CPCY02E60/13
Inventor 王岩张剑芳吴玉程舒霞崔接武周琪张勇
Owner HEFEI UNIV OF TECH
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