Unlock instant, AI-driven research and patent intelligence for your innovation.

Nitrogen-doped graphene modified Cu7S4/CuS composite material, preparation method and application thereof

A technology of nitrogen-doped graphene and composite materials, applied in the field of nitrogen-doped graphene-modified heptacopper tetrasulfide/copper sulfide composite materials and its preparation, can solve the problem of fast battery capacity decay, low conductivity, and restrictions on battery photoelectric conversion efficiency and other issues, to achieve good electrochemical stability, large specific surface area, and the effect of promoting contact

Inactive Publication Date: 2018-11-16
ANHUI UNIVERSITY
View PDF4 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, when copper sulfide is used as the counter electrode material of dye-sensitized solar cells, there are many problems: on the one hand, when copper sulfide is used as the electrode material, the conductivity is relatively low, and the battery capacity decays quickly, which seriously restricts the photoelectric conversion of the battery. efficiency
Among them, when copper sulfide is used as the counter electrode material of dye-sensitized solar cells, there are many problems: on the one hand, when copper sulfide is used as the electrode material, the conductivity is relatively low, and the battery capacity decays quickly, which seriously restricts the photoelectric conversion of the battery. efficiency
However, the preparation of nitrogen-doped graphene-modified heptacopper tetrasulfide / copper sulfide composites with hollow and porous structure through the combination of hydrothermal method and hydrothermal method has not been reported, and it has not been reported for the counter electrode of dye-sensitized solar cells.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Nitrogen-doped graphene modified Cu7S4/CuS composite material, preparation method and application thereof
  • Nitrogen-doped graphene modified Cu7S4/CuS composite material, preparation method and application thereof
  • Nitrogen-doped graphene modified Cu7S4/CuS composite material, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A preparation method of copper heptasulfide / copper sulfide composite material modified by nitrogen-doped graphene, the specific steps are as follows:

[0039] (1) Add copper nitrate trihydrate and 0.5 gram of PVP in the ethylene glycol solution, stir until it dissolves completely;

[0040] (2) Add sodium hydroxide solution and ascorbic acid solution to the solution obtained in step (1) successively, at intervals, drop by drop under magnetic stirring, and after ultrasonic treatment, continue to stir until it is fully mixed;

[0041] Both the added sodium hydroxide solution and the ascorbic acid solution were 10 mL, and the molar mass ratios of the added amount to the added copper nitrate trihydrate were 6:1 and 2:1, respectively.

[0042] (3) Place the solution obtained in step (2) in a water bath for water bath reaction, the temperature of the water bath is 55°C, and the time is 0.5h;

[0043] (4) Graphene oxide powder is placed in deionized water, and after ultrasonic...

Embodiment 2

[0053] A preparation method of heptacopper tetrasulfide / copper sulfide composite material, the specific steps are as follows:

[0054] (1) Add copper nitrate trihydrate and 0.5 gram of PVP in the ethylene glycol solution, stir until it dissolves completely;

[0055](2) Add sodium hydroxide solution and ascorbic acid solution to the solution obtained in step (1) successively, at intervals, drop by drop under magnetic stirring, and after ultrasonic treatment, continue to stir until it is fully mixed;

[0056] Both the added sodium hydroxide solution and the ascorbic acid solution were 10 mL, and the molar mass ratios of the added amount to the added copper nitrate trihydrate were 6:1 and 2:1, respectively.

[0057] (3) Place the solution obtained in step (2) in a water bath for water bath reaction, the temperature of the water bath is 55°C, and the time is 0.5h;

[0058] (4) add copper chloride dihydrate, urea, hexamethylenetetramine successively in the solution gained in step ...

Embodiment 3

[0064] A preparation method of copper tetrasulfide composite material, the concrete steps are as follows:

[0065] (1) Add copper nitrate trihydrate and 0.5 gram of PVP in the ethylene glycol solution, stir until it dissolves completely;

[0066] (2) Add sodium hydroxide solution and ascorbic acid solution to the solution obtained in step (1) successively, at intervals, drop by drop under magnetic stirring, and after ultrasonic treatment, continue to stir until it is fully mixed;

[0067] Both the added sodium hydroxide solution and the ascorbic acid solution were 10 mL, and the molar mass ratios of the added amount to the added copper nitrate trihydrate were 6:1 and 2:1, respectively.

[0068] (3) Place the solution obtained in step (2) in a water bath for water bath reaction, the temperature of the water bath is 55°C, and the time is 0.5h;

[0069] (4) Add urea and hexamethylenetetramine successively to the solution obtained in step (3) and stir, then slowly add the ethylen...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a nitrogen-doped graphene modified Cu7S4 / CuS composite material. The composite material has a hollow nanosphere structure, and furthermore the surface of the sphere is loose and porous and is uniformly distributed on the nitrogen-doped graphene. When the material is used as a dye-sensitized solar battery counter electrode, the battery has excellent photoelectric performance; wherein in the same condition, the photoelectric conversion efficiency of the counter electrode material battery with Cu7S4 / CuS@nGO reaches 9.14%, and is higher than 8.11% of Cu7S4 / CuS, 7.01% of CuS, 6.71% of Cu7S4 and 6.05% of nGO. A cyclic voltammetry curve represents excellent catalytic capability of the composite material. Oxidation reduction reaction of iodine pair ions at an electrolyte / composite material interface can be effectively promoted. Furthermore according to 30 times of continuous cyclic voltammetry curve circulation, compared with the Cu4S4 / CuS composite material, the Cu7S4 / CuS@nGO material has better electrochemical stability.

Description

technical field [0001] The invention relates to the field of dye-sensitized solar cells and its counter electrode material, in particular to a nitrogen-doped graphene-modified heptacopper tetrasulfide / copper sulfide composite material and its preparation method and application. Background technique [0002] The energy issue has always been one of the important issues facing mankind in this century. As the third generation of solar cells, dye-sensitized solar cells have the advantages of simple preparation process, environmental friendliness, low cost and excellent performance. Among them, the counter electrode is an important part of the battery. On the one hand, it can collect electrons from the external circuit to promote the circuit cycle. On the other hand, it can also promote the reduction of iodide ions to catalyze the ion reaction. The noble metal platinum (Pt) has always been regarded as the best candidate for the counter electrode due to its excellent electrochemic...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/20H01G9/042
CPCH01G9/2022H01G9/2045Y02E10/542
Inventor 李广张康姚吉鑫左学勤杨群
Owner ANHUI UNIVERSITY
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com