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Composite anode showing low performance loss with time

An anode and cathode technology, applied in battery electrodes, climate sustainability, structural parts, etc.

Inactive Publication Date: 2010-03-24
BLOOM ENERGY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although ceramic anodes exhibit good stability under insufficient conditions, they are associated with high polarization losses

Method used

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  • Composite anode showing low performance loss with time
  • Composite anode showing low performance loss with time
  • Composite anode showing low performance loss with time

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Experimental program
Comparison scheme
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Embodiment Construction

[0012] Embodiments of the present invention provide composite multilayer anodes for solid oxide fuel cells, such as reversible SOFCs (ie, SORFCs) and non-reversible SOFCs, that exhibit low performance loss, such as low degradation, over time. In a preferred embodiment, the anode comprises two sublayers, wherein the sublayer closest to the electrolyte consists of doped cerium oxide, while the sublayer remote from the electrolyte comprises nickel, doped cerium oxide Cerium, and scandia-stabilized zirconia ("SSZ"), such as scandia-ceria-stabilized zirconia ("SCSZ"), which may also be referred to as scandia- and cerium-doped zirconia. Doped ceria may comprise ceria doped with trivalent oxides such as doped lanthanum oxide, samarium oxide ("samarium oxide", also known as "samaria"), gadolinium oxide ("gadolinium oxide", also known as " gadolinia"), praseodymia, or ceria of yttrium oxide ("yttrium oxide", also known as "yttria"). The trivalent oxide may comprise 10 mol % to 40 mol ...

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Abstract

A solid oxide fuel cell includes cathode electrode, a solid oxide electrolyte, and an anode electrode including a first sublayer and a second sublayer. The first sublayer is located between the electrolyte and the second sublayer. The first sublayer is composed of a doped ceria and the second sublayer is composed of a nickel containing phase and a ceramic phase including a doped ceria and scandia stabilized zirconia, such as scandia ceria stabilized zirconia.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of US Patent Application Serial No. 11 / 785,034, filed April 13, 2007, which is hereby incorporated by reference in its entirety. technical field [0003] The present invention relates generally to fuel cell components and, in particular, to solid oxide fuel cell anode materials. Background technique [0004] A fuel cell is an electrochemical device that efficiently converts energy stored in a fuel into electrical energy. An electrolysis cell is an electrochemical device that can use electrical energy to reduce a given material, such as water, to produce a fuel, such as hydrogen. Fuel cells and electrolysis cells may include reversible cells operating in fuel cell and electrolysis modes. [0005] In high temperature fuel cell systems, such as solid oxide fuel cell (SOFC) systems, the oxidizing stream passes through the cathode side of the fuel cell and the fuel stream passes through...

Claims

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Application Information

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IPC IPC(8): H01M8/10
CPCH01M4/9025H01M4/9016H01M4/9066H01M8/1253Y02E60/521H01M4/8885Y02E60/50H01M2008/1293Y02E60/525H01M4/8657Y02P70/50
Inventor 伊马德·埃·巴塔韦
Owner BLOOM ENERGY CORP