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Preparation method of one-dimensional nanofiber SSC based composite cathode

A nanofiber, composite cathode technology, applied in the fields of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problem of large polarization resistance of the cathode interface, and achieve the increase and stability of the three-phase interface. performance, excellent electrochemical properties

Active Publication Date: 2014-11-19
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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  • Preparation method of one-dimensional nanofiber SSC based composite cathode
  • Preparation method of one-dimensional nanofiber SSC based composite cathode
  • Preparation method of one-dimensional nanofiber SSC based composite cathode

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specific Embodiment approach 1

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

specific Embodiment approach 2

[0026] Embodiment 2: The preparation method of the 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 according to the molar ratio of Sm element, Sr element and Co element as 1-x:x:1, and then weigh samarium nitrate, strontium nitrate and cobalt nitrate Add to 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 electrospinning precursor solution, and then carry out electrospinning, to obtain 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. The nanofibers are heated to 300°C at a heating ra...

specific Embodiment approach 3

[0030] Embodiment 3: The difference between this embodiment and Embodiment 2 is 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 nanofiber SSC (Sm(1-x)SrxCoO(3-delta)) cathode material as well as a preparation method thereof, a composite cathode by utilizing the cathode material as well as a preparation method thereof, and relates to a cathode material, a cathode as well as preparation methods thereof, aiming to solve the technical problem of large interfacial polarization impedance of the cathode prepared by the method. The one-dimensional nanofiber SSC cathode material is a Sm(1-x)SrxCoO(3-delta) material, which is a one-dimensional nanofiber prepared by electrostatic spinning and sintering. The composite cathode comprises an electrolytic strip, an anode or a cathode as support bodies, and the one-dimensional nanofiber SSC cathode 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 preparation method of a cathode. Background technique [0002] Solid oxide fuel cell (SOFC) is one of the replacements for traditional energy systems. It is composed of a solid electrolyte, an anode (fuel electrode), a cathode (air electrode), a connector or bipolar plate, and a sealing material. 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 is the place where the oxygen in the air reacts with the electrons. O 2 O formed at the cathode 2- through a solid electrolyte (O 2- The ion conductor) is tr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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