Self-supported titanium nitride/graphene combined electrode and preparation method thereof

A graphene composite, titanium nitride technology, applied in circuits, capacitors, electrical components and other directions, can solve the problems of close-packed particles unfavorable for full contact between electrolyte and electrode materials, easy agglomeration of nitride particles, and poor electron transmission capacity. Achieve the effect of favorable electron transport, simple process route and high porosity

Active Publication Date: 2015-05-13
SHANGHAI UNIV OF ENG SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the fact that pure nitride particles are easy to agglomerate and have poor electron transport ability, the disordered close-packed particles are not conducive to full contact between the electrolyte and the electrode material. In addition, how to firmly attach the nitride to the surface of the conductive glass is also a problem.

Method used

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  • Self-supported titanium nitride/graphene combined electrode and preparation method thereof
  • Self-supported titanium nitride/graphene combined electrode and preparation method thereof
  • Self-supported titanium nitride/graphene combined electrode and preparation method thereof

Examples

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Embodiment 1

[0032] The preparation method of self-supporting titanium nitride / graphene composite electrode comprises the following steps:

[0033] (1) Take a titanium foil with a thickness of 200 microns and a purity of 95%, and ultrasonically clean it with detergent, deionized water and ethanol for 15 minutes in turn, soak the cleaned titanium foil in acid solution for 3 minutes, and the acid solution The volume ratio of medium-concentrated hydrofluoric acid, concentrated nitric acid and water is 1:19:100; take out the titanium foil and rinse it with deionized water, and transfer the titanium foil to a beaker filled with a 30% hydrogen peroxide solution at normal pressure. Heat the solution from room temperature to 90°C by heating in a water bath, and keep it warm for 35 minutes. After the reaction, take out the titanium foil and dry it;

[0034] (2) Place the titanium foil obtained in step (1) in a tube-type atmosphere furnace, feed ammonia gas to nitride the titanium foil, the flow rat...

Embodiment 2

[0038] The preparation method of self-supporting titanium nitride / graphene composite electrode comprises the following steps:

[0039] (1) Take a titanium foil with a thickness of 100 microns and a purity of 99%, and ultrasonically clean it with detergent, deionized water and ethanol for 5 minutes in sequence, soak the cleaned titanium foil in acid solution for 2 minutes, and the acid solution The volume ratio of medium-concentrated hydrofluoric acid, concentrated nitric acid and water is 1:10:100; the titanium foil is taken out and rinsed with deionized water, and the titanium foil is transferred to a beaker filled with a 30% hydrogen peroxide solution at normal pressure. Next, heat the solution from room temperature to 90°C with an oil bath, and keep it warm for 50 minutes. After the reaction, take out the titanium foil and dry it;

[0040] (2) The titanium foil obtained in step (1) is placed in a tubular atmosphere furnace, and ammonia gas is fed into the titanium foil for ...

Embodiment 3

[0044] The preparation method of self-supporting titanium nitride / graphene composite electrode comprises the following steps:

[0045] (1) Take a titanium foil with a thickness of 10 microns and a purity of 99.9%, and ultrasonically clean it with detergent, deionized water and ethanol for 5 minutes in turn, soak the cleaned titanium foil in acid solution for 2 minutes, and the acid solution The volume ratio of medium-concentrated hydrofluoric acid, concentrated nitric acid and water is 1:10:100; the titanium foil is taken out and rinsed with deionized water, and the titanium foil is transferred to a beaker filled with a 35% hydrogen peroxide solution at normal pressure. Heat the solution from room temperature to 95°C by microwave, and keep it warm for 10 minutes. After the reaction, take out the titanium foil and dry it;

[0046] (2) The titanium foil obtained in step (1) is placed in a tubular atmosphere furnace, and ammonia gas is fed into the titanium foil for nitriding tre...

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Abstract

The invention relates to a self-supported titanium nitride/graphene combined electrode and a preparation method of the self-supported titanium nitride/graphene combined electrode. The preparation method comprises the steps that (1) titanium foil is soaked with acid liquid, ultrasonic processing is conducted on the titanium foil, the titanium foil is taken out, washed by deionized water, and soaked with a hydrogen peroxide solution, the temperature of the solution is increased to 60DEG C-95DEG C from the room temperature under the normal pressure through heating, the temperature is kept for 10-60 minutes, and the titanium foil is taken out and dried after an reaction ends; (2) the titanium foil is placed into a tubular atmosphere furnace, ammonia is fed into the tubular atmosphere furnace to conduct nitrogen treatment on the titanium foil, and titanium nitride is formed on the surface of the titanium foil; (3) a layer of graphene is formed on the surface of the titanium nitride in a deposition mode through a dipping-pull method or a drop casting method, and the graphene and the titanium nitride are placed into a drying oven at the temperature ranging from 60DEG C to 100DEG C to be dried, so that the self-supported titanium nitride/graphene combined electrode is obtained. Compared with the prior art, a graphene/titanium nitride three-dimensional network is directly formed on the surface of flexible metal foil so that the self-supported electrode can be formed. The combined electrode is low in cost, high in porosity ratio and good in catalytic activity and electrical conductivity, and has the broad application prospect.

Description

technical field [0001] The invention belongs to the field of counter electrodes of dye-sensitized solar cells, in particular to a self-supporting titanium nitride / graphene composite electrode and a preparation method thereof. Background technique [0002] Dye-sensitized solar cells are low-cost solar cells with a wide range of materials, simple structures, and relatively high efficiency. A typical dye-sensitized solar cell consists of the following parts, including: conductive substrate, dye, nanocrystalline oxide film, electrolyte, and counter electrode. In the dye-sensitized solar cell, the counter electrode is mainly responsible for the reduction of I3- ions in the electrolyte, so that the redox couple in the electrolyte is in a balanced state. In order to make the reduction reaction of triiodide ion proceed smoothly, it is necessary to use a material with certain catalytic activity as the counter electrode. Platinum (Pt) has been the most commonly used counter electrod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/042H01G9/048H01G9/20
Inventor 芮一川徐菁利张敏王琳琳
Owner SHANGHAI UNIV OF ENG SCI
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