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Electrode of solid oxide fuel battery and preparation method for solid oxide fuel battery

A solid oxide and fuel cell technology, which is applied in solid electrolyte fuel cells, battery electrodes, circuits, etc., can solve the problems of complex preparation process, increase of battery ohmic resistance, and low interface bonding strength, and achieve the effect of simple preparation process

Active Publication Date: 2013-07-10
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The anode contact layer is formed of metal powder, and the cathode contact layer is formed of metal powder and perovskite oxide powder. Due to the existence of the anode contact layer and the cathode contact layer, the bonding strength inside the electrode is different from that between the electrode and the electrolyte interface. Strength, so that under the action of thermal stress, the stress can be released and the electrodes can be protected; however, because the intermediate layer is a pure electrolyte layer, the ohmic resistance of the battery increases, thereby reducing the performance of the battery; and the sintering of the electrode and the contact layer needs to be separated Sintering, resulting in complex preparation process and low interface bonding strength

Method used

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  • Electrode of solid oxide fuel battery and preparation method for solid oxide fuel battery
  • Electrode of solid oxide fuel battery and preparation method for solid oxide fuel battery
  • Electrode of solid oxide fuel battery and preparation method for solid oxide fuel battery

Examples

Experimental program
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Effect test

Embodiment 1

[0053] Prepare lanthanum strontium manganese (LSM) according to the method disclosed in Example 1 of patent CN102167403A, prepare scandia-doped zirconia (SSZ) according to the method disclosed in Example 5, and prepare gadolinia-doped cerium oxide according to the method disclosed in Example 6 ( GDC), nickel oxide (NiO) was prepared according to the method disclosed in Example 1 of patent CN101989664A.

[0054] Mix 60g of gadolinia-doped cerium oxide (GDC) and 40g of nickel oxide prepared above evenly, add 12g of terpineol, ball mill for 18 hours, add 4g of ethyl cellulose, and ball mill for 6 hours to prepare an anode inner layer slurry Material; 40g GDC and 60g NiO prepared above were mixed evenly, 12g terpineol was added, 4g ethyl cellulose was added after ball milling for 18 hours, and ball milling was done for 6 hours to prepare the anode outer layer slurry; the 50g lanthanum strontium prepared above Manganese and 50 g of scandia-doped zirconia (SSZ) were mixed uniformly,...

Embodiment 2

[0058] Prepare lanthanum strontium manganese (LSM) according to the method disclosed in Example 1 of patent CN102167403A, prepare scandia-doped zirconia (SSZ) according to the method disclosed in Example 5, and prepare gadolinia-doped cerium oxide according to the method disclosed in Example 6 ( GDC), nickel oxide (NiO) was prepared according to the method disclosed in Example 1 of patent CN101989664A.

[0059] Mix 70g of GDC and 30g of NiO prepared above evenly, add 12g of terpineol, ball mill for 18 hours, add 4g of ethyl cellulose, and ball mill for 6 hours to prepare an anode inner layer slurry; mix 30g of GDC and 70g of NiO prepared above Evenly, add 12g terpineol, add 4g ethyl cellulose after ball milling for 18 hours, and ball mill for 6 hours to prepare the anode outer layer slurry; mix 50g lanthanum strontium manganese and 50g scandium oxide doped zirconia prepared above evenly, Add 12g of terpineol, ball mill for 18 hours, add 4g of ethyl cellulose, and ball mill for...

Embodiment 3

[0063] Prepare lanthanum strontium manganese (LSM) according to the method disclosed in Example 1 of patent CN102167403A, prepare scandia-doped zirconia (SSZ) according to the method disclosed in Example 5, and prepare gadolinia-doped cerium oxide according to the method disclosed in Example 6 ( GDC), nickel oxide (NiO) was prepared according to the method disclosed in Example 1 of patent CN101989664A.

[0064] Mix 55g of SSZ and 45g of NiO prepared above evenly, add 12g of terpineol, ball mill for 18 hours, add 4g of ethyl cellulose, and ball mill for 6 hours to prepare an anode inner layer slurry; mix 40g of GDC and 60g of NiO prepared above Evenly, add 12g terpineol, add 4g ethyl cellulose after ball milling for 18 hours, and ball mill for 6 hours to prepare the anode outer layer slurry; mix 50g lanthanum strontium manganese and 50g scandium oxide doped zirconia prepared above evenly, Add 12g of terpineol, ball mill for 18 hours, add 4g of ethyl cellulose, and ball mill for 6...

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Abstract

The invention provides a solid oxide fuel battery, comprising a cathode layer, an electrolyte layer, an inner anode layer and an outer anode layer, wherein the electrolyte layer is compounded on the cathode layer; the inner anode layer is compounded on the electrolyte layer; the outer anode layer is compounded on the inner anode layer; and the oxygen ion conductor material content of the inner anode layer is higher than that of the outer anode layer. The internal strength of the electrode is lower than the interface bonding strength of electrodes and electrolyte, and the outer anode layer generates cracks preferentially under the action of stress and releases stress, so that the effects of stress buffering and protecting interface bonding of the electrodes and the electrolyte are achieved. The electrode is of a three-dimensional porous structure, and the influence of the cracks in the electrode on the performance of the battery is obviously weaker than that of interface cracks, so that the stability of the battery is improved. In addition, the inner anode layer and the outer anode layer provided by the invention can be sintered together, so that the preparation process is simpler.

Description

technical field [0001] The invention relates to the technical field of solid oxide fuel cells, in particular to an electrode of a solid oxide fuel cell and a preparation method thereof. Background technique [0002] A solid oxide fuel cell (SOFC) is a device that converts the chemical energy of a fuel directly into electrical energy. SOFC is mainly composed of electrolyte (electrolyte), anode (anode), and cathode (cathode). Among them, the anode is also called the fuel electrode (fuel electrode), and the cathode is also called the air electrode (air electrode). The anode is the place where the fuel is oxidized, and the cathode is the place where the oxidant is reduced. Both electrodes contain catalysts and oxygen ion conductor materials that accelerate the electrochemical reaction of the electrodes. When the battery works, it is equivalent to a DC power supply, the anode is the negative pole of the power supply, and the cathode is the positive pole of the power supply. [...

Claims

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Application Information

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IPC IPC(8): H01M8/12H01M4/86
CPCY02E60/50Y02P70/50
Inventor 王蔚国王建新何长荣杨成锐朱骏孙珊珊
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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