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Cobalt-nickel metal sulfide, preparation method and application thereof

A technology of sulfide and bimetal, which is applied in the field of new energy materials and devices, can solve the problems of high preparation cost and achieve the effects of low cost, good electrochemical performance and short cycle time

Active Publication Date: 2015-05-13
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The few non-Pt transparent counter electrode materials that have been applied for patents belong to transition metal nitrides (see patent CN 103325577 A), and their preparation methods are mainly magnetron sputtering, which is a vacuum system preparation process, and the preparation cost is relatively high

Method used

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  • Cobalt-nickel metal sulfide, preparation method and application thereof
  • Cobalt-nickel metal sulfide, preparation method and application thereof
  • Cobalt-nickel metal sulfide, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Example 1 The counter electrode prepared in the first step with a hydrothermal temperature of 90°C

[0015] (1) Put the clean FTO conductive glass with the conductive surface down and place it in the water heating kettle.

[0016] (2) Prepare a mixed solution with a concentration ratio of nickel nitrate: cobalt nitrate: ammonium fluoride: urea in a concentration ratio of 0.5-2.5:0.5-4:2-6:3-7.

[0017] (3) Pour the solution in (2) into the hydrothermal kettle in (1), and conduct a hydrothermal reaction at 90° C. for 1 to 8 hours.

[0018] (4) The sample obtained by the hydrothermal reaction was rinsed three times with deionized water, and dried at 60°C.

[0019] (5) Put the sample prepared above into a hydrothermal kettle.

[0020] (6) Prepare a sodium sulfide aqueous solution with a concentration of 1-5mg / ml, pour it into a hydrothermal kettle with a sample, and conduct a hydrothermal reaction at 90-160°C for 6-12 hours.

[0021] (7) Rinse the sample obtained by hyd...

Embodiment 2

[0027] Example 2 The counter electrode prepared in the first step with a hydrothermal temperature of 120°C

[0028] The difference between this example and Example 1 is that the hydrothermal temperature in step (3) is 120° C., and other steps and experimental conditions are the same as in Example 1. Such as image 3 and 4 The scanning electron micrographs of the surface and interface of the counter electrode were prepared under this condition. The surface of the sample presents an upright nanosheet structure perpendicular to the direction of the film surface, and the thickness of the nanosheet film is about 5 μm.

[0029] TiO 2 The preparation of the photoanode and the battery performance test method and steps are the same as those described in Example 1, and the test results are shown in Table 1 and Table 2.

[0030] Table 1: Cell performance data when light is incident from the photoanode side

[0031]

[0032] Table 2: Cell performance data when light is incident fr...

Embodiment 3

[0034] Example 3 The counter electrode prepared under the condition that the ratio of ammonium fluoride and urea is 2:3

[0035] (1) Put the clean FTO conductive glass with the conductive surface down and place it in the water heating kettle.

[0036] (2) Prepare a mixed solution with a concentration ratio of nickel nitrate: cobalt nitrate: ammonium fluoride: urea in a concentration ratio of 0.5-2.5:0.5-4:2:3.

[0037] (3) Pour the solution in (2) into the hydrothermal kettle in (1), and conduct a hydrothermal reaction at 70-140° C. for 1-8 hours.

[0038] (4) Rinse the sample obtained by hydrothermal treatment three times with deionized water, and dry at 60°C.

[0039] (5) Put the sample prepared above into the hydrothermal kettle.

[0040] (6) Prepare a sodium sulfide aqueous solution with a concentration of 1-5 mg / ml, pour it into a hydrothermal kettle with a sample, and conduct a hydrothermal reaction at 90-160°C for 6-12 hours.

[0041] (7) Rinse the sheet obtained by ...

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Abstract

The invention discloses a preparation method of a dye-sensitized cell of a nanometer flake-like Cobalt-nickel metal sulfide. A nanometer flake-like cobalt-nickel metal sulfide counter electrode is in-situ grown on FTO conductive glass by a two-step hydrothermal method, and dye-sensitized cell counter electrodes with different morphologies and photoelectrochemical properties can be obtained by changing preparation parameters. A prepared transparent thin-film counter electrode obtains photoelectrochemical properties equivalent to Pt and excellent transparency; and the method is low in manufacturing cost, simple in technology and good in repeatability.

Description

Technical field: [0001] The invention relates to a method for preparing a counter electrode of a dye-sensitized solar cell of a nano-flaky cobalt-nickel bimetallic sulfide, and belongs to the fields of nanomaterial preparation technology and new energy materials and devices. Background technique: [0002] since 1991 The professor first developed dye-sensitized solar cells (dye-sensitized solar cells, DSSCs) with a conversion efficiency of 7.9%. widespread attention. The counter electrode is the main component of DSSCs. A typical counter electrode consists of transparent conductive glass (FTO) and a Pt catalytic layer coated on the surface of FTO. Although the amount of Pt in a single DSSCs is relatively small, if it develops to the megawatt level in the future, its amount will increase significantly, which is not only not conducive to the industrialization of DSSCs, but also contrary to its original intention of low cost. Therefore, the development of cheap and efficien...

Claims

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Application Information

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IPC IPC(8): H01G9/20H01G9/042B82Y40/00
CPCY02E10/542
Inventor 孙小华陈琳琳罗伟龙郑林杰鲍潮
Owner CHINA THREE GORGES UNIV
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