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Method for preparing battery cathode material Re<2-x>A'<x>CuO<4 ??delta> with K<2>NiF<4> structure using electrostatic spinning method

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: 2010-11-10
HEILONGJIANG UNIV
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Problems solved by technology

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 to provide a method for preparing battery cathode materials Re2-xA'xCuO4±δ with K2NiF4 structure by electrospinning

Method used

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  • Method for preparing battery cathode material Re&lt;2-x&gt;A'&lt;x&gt;CuO&lt;4 ??delta&gt; with K&lt;2&gt;NiF&lt;4&gt; structure using electrostatic spinning method
  • Method for preparing battery cathode material Re&lt;2-x&gt;A'&lt;x&gt;CuO&lt;4 ??delta&gt; with K&lt;2&gt;NiF&lt;4&gt; structure using electrostatic spinning method
  • Method for preparing battery cathode material Re&lt;2-x&gt;A'&lt;x&gt;CuO&lt;4 ??delta&gt; with K&lt;2&gt;NiF&lt;4&gt; structure using electrostatic spinning method

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Abstract

The invention provides a method for preparing catelectrode material Ln<2-x>A'<x>CuO<4+ / -delta> 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 Ln<2-x>A'<x>CuO<4+ / -delta> 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 Ln<2-x>A'<x>CuO<4+ / -delta>.The catelectrode material Ln<2-x>A'<x>CuO<4+ / -delta> 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<-1>; cathodic polarization overpotential is less than Sr<0.5>Sm<1.5>NiO4 and La0.8Sr0.2Co0.4Fe0.6O3.

Description

Method for preparing battery cathode material Re2-xA'xCuO4±δ with K2NiF4 structure by electrospinning technical field The invention relates to a preparation method of battery cathode material. Background technique 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. La0.8Sr0.2Co0.4Fe0.6O3 has an oxygen ion conductivity of about 0.03Scm-1 at a temperature of 800°C, and the cathode polarization potential of Sr0.5Sm1.5NiO4 at a temperature of 700°C and a current density of 56mAcm-2 The cathode polarization potential of La0.85Sr0.15MnO3 is 205mV under the conditions of temperature 800°C and current density 20mAcm-2, which is greater than 150mV. It can be seen that the chemical stability and electrode ...

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Application Information

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Patent Type & Authority Patents(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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