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A method of making dye-sensitive battery photoanode by using high-burn-off diatom opal

A dye-sensitive battery and opal technology is applied in the development and utilization of mineral materials to reduce costs, improve crystallinity, and increase short-circuit current.

Active Publication Date: 2019-06-07
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no report on the application of high-calorie diatom opal and its carbonization products in dye-sensitized solar cell anode materials.

Method used

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  • A method of making dye-sensitive battery photoanode by using high-burn-off diatom opal

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] a. Select raw diatom opal with an ignition loss of 18.5wt%, crush it by conventional methods, and purify it by water flotation to obtain diatom opal with a purity of 89wt%. The percentage of total mass. The material was pulverized to below 100 mesh, placed under carbothermal reduction conditions and calcined at 800° C. for 4 hours to obtain diatom opal in situ carbonized biomass.

[0019] b. According to W 碳化硅藻蛋白石 :W TiO2 =0.2 mass ratio, the carbide diatom opal powder that step a obtains, joins in the titanium-containing sulfate aqueous solution of 0.5mol / L, wherein TiO 2 The quality of is converted from the Ti content in the titanium-containing sulfate precursor. Stir well, adjust the pH of the system to 4.5, transfer to a closed reaction kettle, raise the temperature to 180°C, and keep the temperature for 10h. Solid-liquid separation after cooling, washing to no free SO 4 2- , dried to obtain carbonized diatom opal and TiO 2 The composite is a high loss diatom...

Embodiment 2

[0022] a. Select the diatom opal raw ore with an ignition loss of 21.4wt%, pulverize it by conventional methods, and purify it by water flotation to obtain a diatom opal with a purity of 85wt%. The percentage of total mass. The material was pulverized to below 100 mesh, placed under carbothermal reduction conditions and calcined at 600° C. for 6 hours to obtain diatom opal in situ carbonized biomass.

[0023] b. According to W 碳化硅藻蛋白石 :W TiO2=0.4 mass ratio, the carbide diatom opal powder that step a obtains, joins in the titanium-containing sulfate aqueous solution of 1mol / L, wherein TiO 2 The quality of is converted from the Ti content in the titanium-containing sulfate precursor. Stir well, adjust the pH of the system to 6, transfer to a closed reaction kettle, raise the temperature to 200°C, and keep the temperature for 8h. Solid-liquid separation after cooling, washing to no free SO 4 2- , and dried to obtain a composite of carbonized diatom opal and TiO2, which is ...

Embodiment 3

[0026] a. Select raw diatom opal with an ignition loss of 18.5wt%, crush it by conventional methods, and purify it by water flotation to obtain diatom opal with a purity of 89wt%. The percentage of total mass. The material was pulverized to below 100 mesh, placed under carbothermal reduction conditions and calcined at 1000° C. for 4 hours to obtain diatom opal in situ carbonized biomass.

[0027] b. According to W 碳化硅藻蛋白石 :W TiO2 =0.76 mass ratio, the carbonized diatom opal powder that step a obtains is added in the titanium-containing sulfate aqueous solution of 0.5mol / L, wherein TiO 2 The quality of is converted from the Ti content in the titanium-containing sulfate precursor. Stir well, adjust the pH of the system to 2, transfer to a closed reaction kettle, raise the temperature to 170°C, and keep the temperature for 24h. Solid-liquid separation after cooling, washing to no free SO 4 2- , dried to obtain carbonized diatom opal and TiO 2 The composite is a high loss d...

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Abstract

The invention relates to a method for manufacturing dye-sensitive cell photoanode material through high loss diatom opal. The porousness of the diatom opal, the photoelectric activity of TiO2 and thebiomass adhered in the high loss diatom opal are organically combined so as to prepare the low-cost and high-activity DSSC photoanode material. Firstly the biomass deposited on the surface of the diatom opal is reduced to a porous carbon-containing precursor in an in-situ way through reduction calcining, and then inorganic titanium salt is introduced to react with the surface active component of the carbide diatom opal so that the crystallization degree, the dispersiveness and the adhesion soundness of the TiO2 nanocrystals can be improved. The method is simple in production technology, low inequipment requirement, easy to realize industrial production, low in raw material cost and high in environmental suitability and the obtained photoanode material has high cost performance and dye saturation adsorption quantity so that the short circuit current and the efficiency of the dye-sensitive solar cell can be substantially enhanced.

Description

technical field [0001] The invention belongs to the field of development and utilization of mineral materials, and in particular relates to the preparation of a high-performance photoelectric conversion functional material based on a high-burn-out diatom opal mineral, which is a preparation method of a dye-sensitized solar cell anode. Background technique [0002] With the increasing seriousness of energy crisis, environmental pollution, greenhouse effect and ozone layer depletion, people's demand for renewable green energy continues to increase. Solar energy has become an ideal new energy source that has attracted much attention because of its clean and pollution-free characteristics. Solar cells are one of the most efficient ways to harness solar energy. Since Professor GraetZel of the Swiss Federal Institute of Technology in Lausanne successfully prepared a dye-sensitized solar cell (DSSC) in 1991, its efficiency has gradually approached the level of commercial solar cel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G9/20H01G9/042
CPCH01G9/2045Y02E10/542Y02P70/50
Inventor 李芳菲徐远俊蒋引珊薛兵夏茂盛杨晓东巨昊郭宏刚任桂花霍明远
Owner JILIN UNIV