Method for preparing catelectrode material LnA'CuO with K2NiF4 structure by electrostatic spinning

An electrospinning, cathode material technology, applied in battery electrodes, structural parts, circuits, etc., can solve the problems of poor electrode performance and poor chemical stability of cathode materials, and achieve low polarization resistance and good thermal shock resistance. Effect

Inactive Publication Date: 2009-11-04
HEILONGJIANG UNIV
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  • Summary
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  • Claims
  • Application Information

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to solve the problems of poor chemical stability and poor electrode performance of existing cathode materials, and provides an electrospinning method to prepare 2 NiF 4 Structural battery cathode material Ln 2-x A' x CuO 4±δ Methods

Method used

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  • Method for preparing catelectrode material LnA'CuO with K2NiF4 structure by electrostatic spinning
  • Method for preparing catelectrode material LnA'CuO with K2NiF4 structure by electrostatic spinning
  • Method for preparing catelectrode material LnA'CuO with K2NiF4 structure by electrostatic spinning

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specific Embodiment approach 1

[0008] Specific implementation mode 1: In this implementation mode, electrospinning method is used to prepare 2 NiF 4 Structural battery cathode material Ln 2-x A' x CuO 4±δ The method is as follows: 1. After dissolving polyvinylpyrrolidone in ethanol, stir it at a speed of 30-80 rpm for 6h-8h under sealed conditions, and then let it stand at room temperature for 6h-12h to obtain a mass concentration of 8 %~15% polyvinylpyrrolidone ethanol solution; 2. According to the chemical formula Ln 2-x A' x CuO 4±δ According to the molar ratio of Ln element, A' element, Cu element and O element (2-x):x:1:(4±δ) ratio, respectively weigh Ln(NO 3 ) 3 , A'(CH 3 COO) 2 and Cu(CH 3 COO) 2, and then dissolved in distilled water to obtain a uniform and transparent system 1, where Ln 2-x A' x CuO 4±δ The mass percentage in system 1 is 8% to 20%, the Ln element is a rare earth element, the A' element is an alkaline earth metal element, and the chemical formula is Ln 2-x A' x CuO ...

specific Embodiment approach 2

[0010] Embodiment 2: This embodiment differs from Embodiment 1 in that the mass concentration of the polyvinylpyrrolidone ethanol solution described in step 1 is 9% to 13%. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0011] Embodiment 3: This embodiment differs from Embodiment 1 in that the mass concentration of the polyvinylpyrrolidone ethanol solution described in step 1 is 10%. Others are the same as in the first embodiment.

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Abstract

The invention provides a method for preparing catelectrode material LnA'CuO with a K2NiF4 structure by electrostatic spinning, which relates to a method for preparing the catelectrode material. The invention solves the problems of poor chemical stability and poor electrode performance of the existing catelectrode material. The method is as follows: a precursor solution of LnA'CuO and an ethanol solution of polyvinylpyrrolidone are stirred and mixed to stand still; obtained collosol is filled in a syringe, is spun for 6h under the injector pump conditions of 5m1 / h flow rate and 30 kV voltage, and then is dried to be treated by double sintering so as to obtain the catelectrode material LnA'CuO.The catelectrode material LnA'CuO obtained in the invention is fibrous, and the diameter is 200 to 350nm; the value of polarization resistance is low, and the value of specific conductivity is 10 to 40 Scm; cathodic polarization overpotential is less than SrSmNiO4 and La0.8Sr0.2Co0.4Fe0.6O3.

Description

technical field [0001] The invention relates to a preparation method of battery cathode material. Background technique [0002] The intermediate temperature solid oxide fuel cell (ITSOFC) is an efficient and environmentally friendly way of generating electricity. However, the reduction of battery operating temperature causes a rapid decline in electrode activity, and the performance of cathode materials affects the performance of the entire battery system. La 0.8 Sr 0.2 co 0.4 Fe 0.6 o 3 The oxygen ion conductivity is about 0.03Scm at a temperature of 800°C -1 , the temperature is 700℃, the current density is 56mAcm -2 Under the condition of Sr 0.5 SM 1.5 NiO 4 The cathode polarization potential is greater than 150mV, the temperature is 800°C, and the current density is 20mAcm -2 La 0.85 Sr 0.15 MnO 3 The cathode polarization potential of the cathode is 205mV, thus it can be seen that the chemical stability of the existing cathode material is poor, and the elec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88C01G3/02D01D5/00
CPCY02E60/50
Inventor 孙丽萍霍丽华赵辉郝举红程晓丽
Owner HEILONGJIANG UNIV
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