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Preparation method of CeO2 modified nitrogen-doped graphene DSSC counter electrode

A nitrogen-doped graphene and graphene technology, which is applied in the field of dye-sensitized solar cells, can solve the problems of weak electrocatalytic performance, difficult balance of electrical conductivity and catalytic performance, etc., to improve photoelectric conversion efficiency, improve photoelectric conversion efficiency, cost reduction effect

Active Publication Date: 2020-02-21
HEILONGJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the electrocatalytic performance of the existing nitrogen-doped graphene counter electrode is relatively weak, and the conductivity and catalytic performance are difficult to balance, and provide a CeO 2 Preparation method of modified nitrogen-doped graphene DSSC counter electrode

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  • Preparation method of CeO2 modified nitrogen-doped graphene DSSC counter electrode
  • Preparation method of CeO2 modified nitrogen-doped graphene DSSC counter electrode
  • Preparation method of CeO2 modified nitrogen-doped graphene DSSC counter electrode

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specific Embodiment approach 1

[0016] Specific embodiment one: this embodiment a kind of CeO 2 The preparation method of the modified nitrogen-doped graphene DSSC counter electrode is completed in the following steps:

[0017] 1. Ultrasonic disperse graphene oxide in a solvent to obtain graphene oxide solution A. The ratio of the mass of graphene oxide to the volume of the solvent is (0.2-2) mg: 1 mL; add cerium nitrate and ammonium cerium nitrate into graphene oxide solution A, ultrasonically disperse, and react at 140°C to 200°C for 12h to 48h to obtain CeO 2 Modified nitrogen-doped graphene counter electrode material B, the mass ratio of the total mass of cerium nitrate and cerium ammonium nitrate to graphene oxide in graphene oxide solution A is (0.2~2):1, cerium nitrate and cerium ammonium nitrate The mass ratio of (0.1 ~ 4): 1;

[0018] Second, the CeO 2 The modified nitrogen-doped graphene counter electrode material B is dispersed in a non-aqueous solvent, ultrasonicated for 30 minutes to 120 minu...

specific Embodiment approach 2

[0022] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the ratio of the mass of graphene oxide described in step 1 to the volume of the solvent is 1mg: 1mL.

[0023] Under this condition, graphene oxide solution A with better dispersion effect can be obtained, which is beneficial to nitrogen and CeO in the process of hydrothermal reaction. 2 Doping and uniform distribution of components during synthesis.

[0024] Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0025] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the solvent described in step one is water, ethanol or the composition of water and ethanol, and the water and ethanol in the composition of water and ethanol The volume ratio is (0.2~10):1.

[0026] Other steps are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a preparation method of a CeO2-modified nitrogen-doped graphene DSSC counter electrode, and relates to the dye-sensitized solar cell technology field. The method of the invention is used to solve problems that electro-catalytic performance of an existing nitrogen-doped graphene counter electrode is relatively poor, and electrical conductivity and the catalytic performance are difficult to balance. The method comprises the following steps of ultrasonically dispersing graphene oxide in a solvent to obtain a graphene oxide solution A; adding cerous nitrate and ceric ammonium nitrate, carrying out ultrasonic dispersion, and carrying out a heating reaction to obtain a CeO2 modified nitrogen-doped graphene counter electrode material B; putting into a non-aqueous solvent for ultrasonic dispersion, stirring and evaporating to obtain a CeO2 modified nitrogen-doped graphene composite slurry C; then printing to obtain a CeO2 modified nitrogen-doped graphene composite counter electrode film D; and drying, roasting and finally cooling to obtain the CeO2 modified nitrogen-doped graphene DSSC counter electrode. In the invention, the preparation method of the CeO2 modifiednitrogen-doped graphene DSSC counter electrode can be acquired.

Description

technical field [0001] The invention relates to the technical field of dye-sensitized solar cells, in particular to CeO 2 Preparation method of modified nitrogen-doped graphene DSSC counter electrode. Background technique [0002] The counter electrode of a dye-sensitized solar cell (DSSC) simultaneously acts as a catalyst in the cell I - 3 / I - Due to the role of conversion reaction and electron transport, an excellent counter electrode can greatly improve the performance of DSSC. At present, the commonly used counter electrode material is metal platinum (Pt). Pt has good electrical conductivity, catalysis and corrosion resistance, and the conductive glass loaded with Pt has been widely used as the standard counter electrode of DSSC. However, the high cost and rarity of Pt limit its practical application in DSSCs. This has stimulated people's interest in finding and developing Pt-free counter electrode materials. As an ideal photoelectric conversion material, graphen...

Claims

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Application Information

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IPC IPC(8): H01G9/20H01G9/00
CPCH01G9/0029H01G9/2022Y02E10/542Y02P70/50
Inventor 魏立国吴钦航白云起董永利宋微娜孔小红王劲草白青子
Owner HEILONGJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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