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MnO2 and Fe2O3 nanostructure-based flexible asymmetric super-capacitor and preparation method as well as application thereof

A supercapacitor and nanostructure technology, which is applied in the field of flexible asymmetric supercapacitors and their preparation, can solve the problems of being difficult to meet the requirements of easy portability of electronic components, and achieve the effects of excellent performance, reduced complexity, and simple and easy methods.

Active Publication Date: 2013-10-23
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the invention uses KCl liquid electrolyte, which is difficult to meet the current requirements of portable electronic components

Method used

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  • MnO2 and Fe2O3 nanostructure-based flexible asymmetric super-capacitor and preparation method as well as application thereof
  • MnO2 and Fe2O3 nanostructure-based flexible asymmetric super-capacitor and preparation method as well as application thereof
  • MnO2 and Fe2O3 nanostructure-based flexible asymmetric super-capacitor and preparation method as well as application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Preparation of MnO 2 Nanowire anode:

[0035] 2.5mmol KMnO 4 , 1mL of concentrated hydrochloric acid and 45mL mixed solution made of water, evenly added to a 100mL Teflon autoclave, using carbon cloth as the substrate, the mixed solution was grown at 100 ° C for 6 hours, the product was cleaned, and the obtained product was in MnO can be obtained by annealing in air at 300°C for 2 hours. 2 nanowire anode;

[0036] figure 1 for MnO 2 SEM images of nanowires, MnO 2 The nanowires grow uniformly on the carbon fiber, with a diameter between 100-150nm and a length of 2-4μm;

[0037] (2) Preparation of Fe 2 o 3 Nanotube anode:

[0038] A. Grow uniform ZnO nanowires on carbon cloth: use 0.3mol / L KMnO for carbon cloth substrate 4 Pretreatment for 30 minutes to form a seed layer; then put Zn(NO 3 ) 2 In a solution with a concentration of 0.01mol / L and a concentration of HTMA of 0.01mol / L, grow at 80°C for 6 hours, wash the product, and obtain ZnO nanowires;

[0039...

Embodiment 2

[0045] (1) Preparation of MnO 2 Nanowire anode:

[0046] 3mmol KMnO 4 , 100mL mixed solution made of 2mL concentrated hydrochloric acid and water, evenly added to a 100mL Teflon autoclave, using carbon cloth as the substrate, growing the mixed solution at 140°C for 10 hours, cleaning the product, and putting the obtained product in MnO can be obtained by annealing in air at 400°C for 4 hours. 2 nanowire anode;

[0047] (2) Preparation of Fe 2 o 3 Nanotube anode:

[0048] A. Grow uniform ZnO nanowires on carbon cloth: use 0.4mol / L KMnO for carbon cloth substrate 4 Pretreatment for 40 minutes to form a seed layer; then put Zn(NO 3 ) 2 In a solution with a concentration of 0.02mol / L and a concentration of HTMA of 0.02mol / L, grow at 90°C for 10 hours, wash the product, and obtain ZnO nanowires;

[0049] B. Uniform growth of Fe on carbon cloth 2 o 3 Nanotube: put the ZnO nanowire obtained in step A into 0.015M Fe(NO 3 ) 3 solution, kept at room temperature for 8 hours;...

Embodiment 3

[0053] (1) Preparation of MnO 2 Nanowire anode:

[0054] 4mmol KMnO 4 , 3mL of concentrated hydrochloric acid and 80mL mixed solution made of water, evenly added to a 100mL Teflon autoclave, using carbon cloth as a substrate, the mixed solution was grown at 140 °C for 18 hours, the product was cleaned, and the obtained product was MnO can be obtained by annealing in air at 500°C for 6 hours. 2 nanowire anode;

[0055] (2) Preparation of Fe 2 o 3 Nanotube anode:

[0056] A. Grow uniform ZnO nanowires on carbon cloth: use 0.5mol / L KMnO for carbon cloth substrate 4 Pretreatment for 50 minutes to form a seed layer; then put Zn(NO 3 ) 2 In a solution with a concentration of 0.03mol / L and a concentration of HTMA of 0.03mol / L, grow at 90°C for 18 hours, wash the product, and obtain ZnO nanowires;

[0057] B. Uniform growth of Fe on carbon cloth 2 o 3 Nanotube: put the ZnO nanowire obtained in step A into 0.02M Fe(NO 3 ) 3 solution, kept at room temperature for 10 hours; ...

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Abstract

The invention belongs to the field of super-capacitor design, and discloses a MnO2 and Fe2O3 nanostructure-based flexible asymmetric super-capacitor and a preparation method as well as application thereof. The preparation method comprises the following steps: preparing a MnO2 nanowire positive electrode and a Fe2O3 nanotube negative electrode; and assembling the positive electrode, the negative electrode, electrolyte and a diaphragm into an asymmetric super-capacitor. According to the method, complexity for manufacturing the asymmetric super-capacitor is reduced, and energy density of the obtained super-capacitor reaches 0.47 mWh / cm<3>. The method is simple and practicable, MnO2 nanowires and Fe2O3 nanotubes can be grown on a large scale, and the asymmetric super-capacitor with superior performance is prepared.

Description

technical field [0001] The invention belongs to the field of supercapacitor design and relates to a MnO-based 2 and Fe 2 o 3 Nanostructured flexible asymmetric supercapacitors and their preparation methods and applications. Background technique [0002] Energy shortage and environmental degradation are common concerns in today's society. With the depletion of resources such as coal and oil, the search for clean energy and renewable energy has become a hot issue of common concern to all countries in the world. Supercapacitor is a new, efficient and practical energy storage device whose performance is between that of batteries and traditional capacitors. It has the advantages of high power density, fast charge and discharge speed, long service life, and environmental friendliness. In recent years, with the development of electronic material devices towards flexibility and portability, flexible supercapacitors have become an important direction for the research and developme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/46H01G11/24
CPCY02E60/13
Inventor 麦文杰杨培华
Owner JINAN UNIVERSITY
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