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One-dimensional nanofiber SSC (Sm(1-x)SrxCoO(3-delta)) cathode material, preparation method of the cathode material, composite cathode using cathode material and preparation method of composite cathode

A technology of nanofibers and cathode materials, applied in the direction of nanotechnology, nanotechnology, fuel cell components, etc., can solve the problems of large polarization impedance of the cathode interface, and achieve the increase of the three-phase interface, good stability, and excellent electrical conductivity. The effect of chemical properties

Active Publication Date: 2013-05-15
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the technical problem of large cathode interface polarization impedance prepared by the existing method, to provide a one-dimensional nanofibrous SSC cathode material and its preparation method, a composite cathode using the cathode material and its preparation method

Method used

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  • One-dimensional nanofiber SSC (Sm(1-x)SrxCoO(3-delta)) cathode material, preparation method of the cathode material, composite cathode using cathode material and preparation method of composite cathode
  • One-dimensional nanofiber SSC (Sm(1-x)SrxCoO(3-delta)) cathode material, preparation method of the cathode material, composite cathode using cathode material and preparation method of composite cathode
  • One-dimensional nanofiber SSC (Sm(1-x)SrxCoO(3-delta)) cathode material, preparation method of the cathode material, composite cathode using cathode material and preparation method of composite cathode

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specific Embodiment approach 1

[0025] Specific embodiment 1: The chemical formula of the one-dimensional nanofibrous cathode material in this embodiment is Sm 1-x Sr x CoO 3-δ , wherein 0≤x≤1, the structure of the one-dimensional nanofibrous cathode material is one-dimensional nanofiber.

specific Embodiment approach 2

[0026] Specific embodiment two: the preparation method of one-dimensional nanofibrous cathode material in this embodiment is as follows:

[0027] 1. According to the chemical formula Sm 1-x Sr x CoO 3-δ , 0≤x≤1, weigh samarium nitrate, strontium nitrate and cobalt nitrate respectively according to the ratio of Sm element, Sr element and Co element molar ratio of 1-x:x:1, then samarium nitrate, strontium nitrate and cobalt nitrate Add it into N, N-dimethylformamide, stir magnetically at room temperature until samarium nitrate, strontium nitrate and cobalt nitrate are completely dissolved, then add polyvinylpyrrolidone and stir to obtain an electrospinning precursor solution, and then perform electrospinning, get nanofibers;

[0028] The total mass concentration of samarium nitrate, strontium nitrate and cobalt nitrate in the electrospinning precursor solution is 5-25%, and the mass concentration of polyvinylpyrrolidone is 6-15%;

[0029] 2. Sinter the nanofibers at a consta...

specific Embodiment approach 3

[0030] Embodiment 3: This embodiment differs from Embodiment 2 in that the total mass concentration of samarium nitrate, strontium nitrate and cobalt nitrate in the electrospinning precursor solution in step 1 is 9-20%. Others are the same as in the second embodiment.

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Abstract

The invention discloses a preparation method of a nanofiber SSC based cathode material, and relates to a preparation method of a cathode, aiming to solve the technical problem of large interfacial polarization impedance of the cathode prepared by the method. The composite cathode comprises an electrolytic strip, an anode or a cathode as support bodies, and the one-dimensional nanofiber SSC cathode material Sm(1-x)SrxCoO(3-delta) adhered on the support bodies, wherein electrolyte nanoparticles are adhered on the SSC fiber. The preparation method of the composite cathode comprises the steps of soaking a one-dimensional nanofiber SSC cathode framework in a small amount of electrolyte precursor liquid by multiple times; and sintering to obtain the composite cathode based on the one-dimensional nanofiber SSC material. The composite cathode provided by the invention can be used in a medium-and-low-temperature solid oxide fuel battery.

Description

technical field [0001] The invention relates to a cathode material, a cathode and a preparation method thereof. Background technique [0002] Solid oxide fuel cell (SOFC), as one of the substitutes of traditional energy systems, is composed of solid electrolyte, anode (fuel electrode), cathode (air electrode), connector or bipolar plate and sealing material, etc. An all-solid-state chemical power generation device that can be directly converted into electrical energy. SOFC has the characteristics of low energy consumption production value, clean and efficient energy utilization and minimized environmental pollution. These unique advantages make SOFC an attractive energy system. [0003] The cathode of the solid oxide fuel cell, also known as the air electrode, is the electron receiver of the external electron conduction circuit and the place where oxygen in the air reacts with electrons. o 2 O formed at the cathode 2- Through solid electrolyte (O 2- Ion conductor) is tr...

Claims

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Application Information

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IPC IPC(8): H01M4/86H01M4/88H01M4/90H01M8/02B82Y30/00
CPCY02E60/50
Inventor 熊岳平樊丽权刘连宝王宇威贾铮赵力
Owner HARBIN INST OF TECH
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