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Nitrogen-doped hollow carbon sphere/nickel sulfide/graphene ternary active multilayer/multi-structure composite material and

A technology of hollow carbon spheres and composite materials, applied in the field of dye-sensitized solar cells, to achieve good electrochemical stability, no pollution to the environment, and simple preparation process

Inactive Publication Date: 2019-04-19
ANHUI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, nitrogen-doped hollow carbon spheres were prepared by hydrothermal method as the substrate anchored nickel sulfide nanosheets, and the outer layer encapsulated nitrogen-doped hollow carbon spheres / nickel sulfide / graphene ternary active multilayer / Multi-component structural composites (NHCS / NiS / RGO), and used as counter electrodes for dye-sensitized solar cells have not been reported yet

Method used

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  • Nitrogen-doped hollow carbon sphere/nickel sulfide/graphene ternary active multilayer/multi-structure composite material and
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  • Nitrogen-doped hollow carbon sphere/nickel sulfide/graphene ternary active multilayer/multi-structure composite material and

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Effect test

Embodiment 1

[0045] A preparation method of a nitrogen-doped hollow carbon sphere / nickel sulfide / graphene ternary active multilayer / multiple structure composite material: comprising the following steps:

[0046] (1) 2mL tetraethyl orthosilicate (C 8 h 20 o 4 Si) and 0.04g of dopamine hydrochloride (C 8 h 11 NO 2 HCl) is slowly poured into the mixed solution in turn, and continuously stirred for 36 hours until it is fully mixed;

[0047] Described mixed solution is dehydrated alcohol (C 2 h 6 O), ammonia (NH 3 ·H 2 O, 25%), and deionized water (H 2 O), the volume ratio of the three is 5:1:8.

[0048] (2) After cooling to room temperature, the solution in step (1) is subjected to high-speed centrifugation, and the centrifugation speed is controlled to be 8000-10000r / min, and the obtained precipitate is repeatedly centrifuged and washed with deionized water for 3-4 times until the supernatant It is a clear and transparent liquid, and the obtained final product is dried in a freeze ...

Embodiment 2

[0065] A kind of silicon dioxide / nitrogen-doped hollow carbon spheres (SiO 2 / N-doped carbon spheres) preparation method: comprise the following steps:

[0066] (1) 2mL tetraethyl orthosilicate (C 8 h 20 o 4 Si) and 0.04g of dopamine hydrochloride (C 8 h 11 NO 2 HCl) is slowly poured into the mixed solution successively, and continuously stirred for 36h until it is fully mixed;

[0067] Described mixed solution is dehydrated alcohol (C 2 h 6 O), ammonia (NH 3 ·H 2 O, 25%), and deionized water (H 2 O), the volume ratio of the three is 5:1:8.

[0068] (2) After cooling to room temperature, the solution in step (1) is subjected to high-speed centrifugation, and the centrifugation speed is controlled to be 8000-10000r / min, and the obtained precipitate is repeatedly centrifuged and washed with deionized water for 3-4 times until the supernatant It is a clear and transparent liquid, and the obtained final product is dried in a freeze dryer for 10 hours. The temperature o...

Embodiment 3

[0071] A preparation method of nickel silicide / nitrogen-doped hollow carbon sphere mixture (NHCS / NiSi composites): comprising the following steps:

[0072] (1) 2mL tetraethyl orthosilicate (C 8 h 20 o 4 Si) and 0.04g of dopamine hydrochloride (C 8 h 11 NO 2 HCl) is slowly poured into the mixed solution successively, and continuously stirred for 36h until it is fully mixed;

[0073] Described mixed solution is dehydrated alcohol (C 2 h 6 O), ammonia (NH 3 ·H 2 O, 25%), and deionized water (H 2 O), the volume ratio of the three is 5:1:8.

[0074] (2) After cooling to room temperature, the solution in step (1) is subjected to high-speed centrifugation, and the centrifugation speed is controlled to be 8000-10000r / min, and the obtained precipitate is repeatedly centrifuged and washed with deionized water for 3-4 times until the supernatant It is a clear and transparent liquid, and the obtained final product is dried in a freeze dryer for 10 hours. The temperature of the ...

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Abstract

The invention discloses a nitrogen-doped hollow carbon sphere / nickel sulfide / graphene ternary active multilayer / multi-structure composite material, which is a multilayer multi-element hollow structurematerial formed by anchoring surface evenly distributed porous loose and porous nickel sulfide nanosheets on a hollow nitrogen-doped carbon sphere and packaging reduced graphene oxide on the outmostlayer. When the nitrogen-doped hollow carbon sphere / nickel sulfide / graphene ternary active multilayer / multi-structure composite material is used as a counter electrode of a dye-sensitized solar cell,the dye-sensitized solar cell exhibits excellent photoelectric conversion performance that: under the same conditions, the photoelectric conversion efficiency of the dye-sensitized solar cell with theassembled NHCS / NiS / RGO counter electrode material is up to 9 .32%, which is higher than 8.78% of NHCS / NiS, 5.05% of NHCS and 8.06% of Pt. Moreover, the nitrogen-doped hollow carbon sphere / nickel sulfide / graphene ternary active multilayer / multi-structure composite material further has excellent catalytic performance, and can effectively promote the redox reaction of iodide ion pairs at the interface of an electrolyte / composite material. In addition, the nitrogen-doped hollow carbon sphere / nickel sulfide / graphene ternary active multilayer / multi-structure composite material is prepared by adopting a solvothermal method, the preparation process is simple, the cost is low and no pollution is generated to the environment.

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 hollow carbon sphere / nickel sulfide / graphene ternary active multilayer / multiple structure composite material and a preparation method thereof. Background technique [0002] The development process of human society is closely related to energy development and utilization. With the rapid development of the economy, the use of non-renewable energy is close to exhaustion. On the other hand, in order to solve the problems of increasing environmental pollution, the exploration of various new energy sources, the research of new energy devices, and the development of new energy products are in full swing, including solar energy, wind energy, biomass energy, geothermal energy, and nuclear fusion energy. , hydro and ocean energy, as well as energy derived from biofuels and hydrogen derived from renewable energies. Compared with...

Claims

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Application Information

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IPC IPC(8): H01G9/042H01G9/20
CPCH01G9/2022H01G9/2059Y02E10/542
Inventor 李广王雯姚吉鑫左学勤杨群
Owner ANHUI UNIVERSITY
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