Justifying the significance of Knudsen diffusion in solid oxide fuel cells
Developing an appropriate diffusion mechanism to analyze the gas transport in porous electrodes of SOFCs (solid oxide fuel cells), has been a crucial step towards analyzing accurately the cell performance. In this report, the errors in evaluating the gas diffusivity, limiting current density and con...
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| Veröffentlicht in: | Energy (Oxford) 2016-01, Vol.95, p.242-246 |
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| container_title | Energy (Oxford) |
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| creator | Yang, Fei Gu, Jianmin Ye, Luhan Zhang, Zuoxiang Rao, Gaofeng Liang, Yachun Wen, Kechun Zhao, Jiyun Goodenough, John B. He, Weidong |
| description | Developing an appropriate diffusion mechanism to analyze the gas transport in porous electrodes of SOFCs (solid oxide fuel cells), has been a crucial step towards analyzing accurately the cell performance. In this report, the errors in evaluating the gas diffusivity, limiting current density and concentration polarization, are calculated quantitatively by taking bulk diffusion and the previously-overlooked Knudsen diffusion into account. In particular, this work analyzes the deviation between ignoring and considering the Knudsen diffusion of hydrogen transport in SOFC anodes. The study facilitates the rational pre-evaluation of micro- and nanoscale materials prior to assembly into SOFCs.
•Analyzes mechanisms of gas diffusion in porous electrodes.•Evaluates uncertainty in performance analysis via previous models.•Justifies Knudsen diffusion for realizing high-performance SOFCs. |
| doi_str_mv | 10.1016/j.energy.2015.12.022 |
| format | Article |
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•Analyzes mechanisms of gas diffusion in porous electrodes.•Evaluates uncertainty in performance analysis via previous models.•Justifies Knudsen diffusion for realizing high-performance SOFCs.</description><subject>Anode</subject><subject>Assembly</subject><subject>Concentration polarization</subject><subject>Constraining</subject><subject>Deviation</subject><subject>Diffusion</subject><subject>Diffusivity</subject><subject>Electrodes</subject><subject>Gas diffusion</subject><subject>Limiting current density</subject><subject>Mathematical analysis</subject><subject>Solid oxide fuel cells</subject><issn>0360-5442</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2016</creationdate><recordtype>article</recordtype><recordid>eNqFkDtPwzAUhT2ARCn8AwaPLA2287C9IKGKV6nEArPl2NfFVWoXO0H035MqzDDd5TtH534IXVFSUEKbm20BAdLmUDBC64KygjB2gmakbMiirip2hs5z3hJCaiHlDK1WQ-69O_iwwf0H4Ow3wTtvdDCAo8MvYbAZArbeuSH7GLAPOMfOWxy_vQXsBuiwga7LF-jU6S7D5e-do_eH-7fl02L9-vi8vFsvTMV5v7BOW8FYRURbNg1tdemklWXDm5YJSwWvhWslq2VlCdGlMcBqKjltSsNrCrqco-upd5_i5wC5Vzufjwt0gDhkRQURpGZM8P9RLonk1YiPaDWhJsWcEzi1T36n00FRoo5m1VZNZtXRrKJMjWbH2O0Ug_HjLw9JZeNhlGd9AtMrG_3fBT9i9IT-</recordid><startdate>20160101</startdate><enddate>20160101</enddate><creator>Yang, Fei</creator><creator>Gu, Jianmin</creator><creator>Ye, Luhan</creator><creator>Zhang, Zuoxiang</creator><creator>Rao, Gaofeng</creator><creator>Liang, Yachun</creator><creator>Wen, Kechun</creator><creator>Zhao, Jiyun</creator><creator>Goodenough, John B.</creator><creator>He, Weidong</creator><general>Elsevier Ltd</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7ST</scope><scope>C1K</scope><scope>SOI</scope><scope>7SP</scope><scope>7TB</scope><scope>8FD</scope><scope>F28</scope><scope>FR3</scope><scope>KR7</scope><scope>L7M</scope></search><sort><creationdate>20160101</creationdate><title>Justifying the significance of Knudsen diffusion in solid oxide fuel cells</title><author>Yang, Fei ; Gu, Jianmin ; Ye, Luhan ; Zhang, Zuoxiang ; Rao, Gaofeng ; Liang, Yachun ; Wen, Kechun ; Zhao, Jiyun ; Goodenough, John B. ; He, Weidong</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c477t-dfad822408b3661ba3f9d93676b28d18758fb92594d00a3cce25197163c751ea3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2016</creationdate><topic>Anode</topic><topic>Assembly</topic><topic>Concentration polarization</topic><topic>Constraining</topic><topic>Deviation</topic><topic>Diffusion</topic><topic>Diffusivity</topic><topic>Electrodes</topic><topic>Gas diffusion</topic><topic>Limiting current density</topic><topic>Mathematical analysis</topic><topic>Solid oxide fuel cells</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Yang, Fei</creatorcontrib><creatorcontrib>Gu, Jianmin</creatorcontrib><creatorcontrib>Ye, Luhan</creatorcontrib><creatorcontrib>Zhang, Zuoxiang</creatorcontrib><creatorcontrib>Rao, Gaofeng</creatorcontrib><creatorcontrib>Liang, Yachun</creatorcontrib><creatorcontrib>Wen, Kechun</creatorcontrib><creatorcontrib>Zhao, Jiyun</creatorcontrib><creatorcontrib>Goodenough, John B.</creatorcontrib><creatorcontrib>He, Weidong</creatorcontrib><collection>CrossRef</collection><collection>Environment Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Environment Abstracts</collection><collection>Electronics & Communications Abstracts</collection><collection>Mechanical & Transportation Engineering Abstracts</collection><collection>Technology Research Database</collection><collection>ANTE: Abstracts in New Technology & Engineering</collection><collection>Engineering Research Database</collection><collection>Civil Engineering Abstracts</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Energy (Oxford)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Yang, Fei</au><au>Gu, Jianmin</au><au>Ye, Luhan</au><au>Zhang, Zuoxiang</au><au>Rao, Gaofeng</au><au>Liang, Yachun</au><au>Wen, Kechun</au><au>Zhao, Jiyun</au><au>Goodenough, John B.</au><au>He, Weidong</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Justifying the significance of Knudsen diffusion in solid oxide fuel cells</atitle><jtitle>Energy (Oxford)</jtitle><date>2016-01-01</date><risdate>2016</risdate><volume>95</volume><spage>242</spage><epage>246</epage><pages>242-246</pages><issn>0360-5442</issn><abstract>Developing an appropriate diffusion mechanism to analyze the gas transport in porous electrodes of SOFCs (solid oxide fuel cells), has been a crucial step towards analyzing accurately the cell performance. 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| ispartof | Energy (Oxford), 2016-01, Vol.95, p.242-246 |
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| language | eng |
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| source | Elsevier ScienceDirect Journals Complete |
| subjects | Anode Assembly Concentration polarization Constraining Deviation Diffusion Diffusivity Electrodes Gas diffusion Limiting current density Mathematical analysis Solid oxide fuel cells |
| title | Justifying the significance of Knudsen diffusion in solid oxide fuel cells |
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