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One-dimensional nano fibrous lanthanum strontium titanate (LST) anode material, preparation method thereof, composite anode utilizing anode material and preparation method of composite anode

A nanofiber and anode material technology, applied in fuel cells, battery electrodes, solid electrolyte fuel cells, etc., can solve problems such as carbon deposition, achieve good sulfur resistance, improve poisoning resistance, and high electronic conductivity.

Active Publication Date: 2013-05-22
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of reasonable selection and preparation technology of anode materials such as the reduction of the three-phase interface caused by the phenomenon of carbon deposition on the Ni-based anode and the phenomenon of Ni agglomeration caused by sulfur poisoning when the SOFC uses carbon-based fuels, which affects the working performance of the electrode. and other problems, and provide a one-dimensional nanofibrous LST anode material and its preparation method, a composite anode using the anode material and its preparation method

Method used

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  • One-dimensional nano fibrous lanthanum strontium titanate (LST) anode material, preparation method thereof, composite anode utilizing anode material and preparation method of composite anode
  • One-dimensional nano fibrous lanthanum strontium titanate (LST) anode material, preparation method thereof, composite anode utilizing anode material and preparation method of composite anode
  • One-dimensional nano fibrous lanthanum strontium titanate (LST) anode material, preparation method thereof, composite anode utilizing anode material and preparation method of composite anode

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specific Embodiment approach 1

[0029] Specific embodiment one: the chemical formula of the one-dimensional nanofibrous LST anode material of the present embodiment is La x Sr 1-x TiO 3 , wherein 0≤x≤0.4, the structure of the one-dimensional nanofibrous anode material is one-dimensional nanofiber.

specific Embodiment approach 2

[0030] Specific embodiment two: the preparation method of the one-dimensional nanofibrous LST anode material of the present embodiment is as follows:

[0031] 1. Preparation of electrospinning precursor solution: according to the chemical formula La x Sr 1-x TiO 3 , 0≤x≤0.4, weigh lanthanum nitrate, strontium nitrate and tetrabutyl titanate respectively according to the molar ratio of La element, Sr element and Ti element as x:(1-x):1, and then mix lanthanum nitrate and Add strontium nitrate to N,N-dimethylformamide, stir magnetically at room temperature until lanthanum nitrate and strontium nitrate are completely dissolved, then add polyvinylpyrrolidone and stir for 6~8 hours to obtain a mixed solution, add concentrated nitric acid to adjust the mixed solution pH value to 4~6, then add tetrabutyl titanate, continue to stir until the mixed solution becomes transparent, and obtain the electrospinning precursor solution;

[0032] The total mass concentration of lanthanum nitr...

specific Embodiment approach 3

[0035] Embodiment 3: This embodiment differs from Embodiment 2 in that: the total mass concentration of samarium nitrate, strontium nitrate and tetrabutyl titanate in the electrospinning precursor solution described in step 1 is 8-25%. Others are the same as in the second embodiment.

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Abstract

The invention relates to a preparation method of a one-dimensional fibrous lanthanum strontium titanate (LST) anode material, and relates to an anode material, a composite anode and a preparation method. The invention aims at solving the problems of reasonability in selection of the anode material and insufficiency in preparation technique that when a solid oxide fuel cell (SOFC) utilizes carbon-based fuel, the reduction of a three-phase interface caused by the carbon precipitation phenomenon and the clustering phenomenon of nickel after being deactivated by sulfur compounds on a nickel-based anode influences the working performances of the electrode. The one-dimensional fibrous LST anode material is LaxS(r1-x)TiO3 and obtained by preparing one-dimensional nano fibers through an electrostatic spinning technique and then sintering the one-dimensional nano fibers. The one-dimensional fibers are made into anode slurry to be coated on an electrolyte, cathode or anode supporting body, and a one-dimensional fibrous LST-based LST-GDC composite anode is prepared by adopting a method for combining the electrostatic spinning technique and dipping electrolyte precursor solution. The composite anode can be used in a low-medium-temperature solid oxide fuel cell.

Description

technical field [0001] The invention relates to an anode material, a composite anode and a preparation method thereof. Background technique [0002] Fossil fuels represented by coal, oil, and natural gas are the main energy resources in China (proportion >90%) and even the world (proportion >80%), and their average power generation efficiency is only about 30%, which urgently needs to be improved. One of the outstanding advantages of solid oxide fuel cells (SOFC) is that they can directly use fossil fuels, such as gaseous natural gas, coal-related gasification gas, coke oven gas and coal bed methane, etc., liquid gasoline, aviation diesel and alcohols, etc. , and solid coke and coal, etc. These fuels are mainly composed of carbon-containing compounds, and are collectively referred to as carbon-based fuels here. Carbon-based fuel SOFC is an effective way to achieve efficient conversion and clean utilization of fossil fuels. Compared with coal-fired power generation te...

Claims

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Application Information

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IPC IPC(8): H01M8/12H01M4/86H01M4/88H01M8/1213
CPCY02E60/521Y02E60/525Y02E60/50
Inventor 熊岳平樊丽权王宇威张锦秋贾铮赵力
Owner HARBIN INST OF TECH
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