Fast and Stable Proton Conduction in Heavily Scandium‐Doped Polycrystalline Barium Zirconate at Intermediate Temperatures
The environmental benefits of fuel cells and electrolyzers have become increasingly recognized in recent years. Fuel cells and electrolyzers that can operate at intermediate temperatures (300–450 °C) require, in principle, neither the precious metal catalysts that are typically used in polymer‐elect...
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description | The environmental benefits of fuel cells and electrolyzers have become increasingly recognized in recent years. Fuel cells and electrolyzers that can operate at intermediate temperatures (300–450 °C) require, in principle, neither the precious metal catalysts that are typically used in polymer‐electrolyte‐membrane systems nor the costly heat‐resistant alloys used in balance‐of‐plant components of high‐temperature solid oxide electrochemical cells. These devices require an electrolyte with high ionic conductivity, typically more than 0.01 S cm−1, and high chemical stability. To date, however, high ionic conductivities have been found in chemically unstable materials such as CsH2PO4, In‐doped SnP2O7, BaH2, and LaH3−2xOx. Here, fast and stable proton conduction in 60‐at% Sc‐doped barium zirconate polycrystal, with a total conductivity of 0.01 S cm−1 at 396 °C for 200 h is demonstrated. Heavy doping of Sc in barium zirconate simultaneously enhances the proton concentration, bulk proton diffusivity, specific grain boundary conductivity, and grain growth. An accelerated stability test under a highly concentrated and humidified CO2 stream using in situ X‐ray diffraction shows that the perovskite phase is stable over 240 h at 400 °C under 0.98 atm of CO2. These results show great promises as an electrolyte in solid‐state electrochemical devices operated at intermediate temperatures.
Heavily proton (H+) and Sc‐doped barium zirconate is developed. Sc‐doping up to 60 at% into barium zirconate realizes fast and stable total proton conductivity over 0.01 S cm−1 at 396 °C for 200 h. The material is also stable under 0.98 atm of carbon dioxide at 400 °C over 240 h. |
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Heavily proton (H+) and Sc‐doped barium zirconate is developed. Sc‐doping up to 60 at% into barium zirconate realizes fast and stable total proton conductivity over 0.01 S cm−1 at 396 °C for 200 h. The material is also stable under 0.98 atm of carbon dioxide at 400 °C over 240 h.</description><identifier>ISSN: 1614-6832</identifier><identifier>EISSN: 1614-6840</identifier><identifier>DOI: 10.1002/aenm.202000213</identifier><language>eng</language><publisher>Weinheim: Wiley Subscription Services, Inc</publisher><subject>Accelerated tests ; Alloy systems ; Barium ; Barium zirconates ; Carbon dioxide ; Conductivity ; Electrochemical cells ; Electrolytes ; Electrolytic cells ; Fuel cells ; Grain boundaries ; Grain growth ; heavily proton‐ and Sc‐doped barium zirconate (HSBZ) ; high tolerance against CO 2 ; high total proton conductivity ; Ion currents ; Perovskites ; Polycrystals ; Proton conduction ; proton trapping ; proton‐conducting oxides ; Scandium ; Stability tests</subject><ispartof>Advanced energy materials, 2020-07, Vol.10 (25), p.n/a</ispartof><rights>2020 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim</rights><rights>2020. This article is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c4603-554a6d1d1fbc983bb6f4af3c04a995bfcdf850fee8aa8eb0032feded88fe63c93</citedby><cites>FETCH-LOGICAL-c4603-554a6d1d1fbc983bb6f4af3c04a995bfcdf850fee8aa8eb0032feded88fe63c93</cites><orcidid>0000-0002-9375-5239</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1002%2Faenm.202000213$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1002%2Faenm.202000213$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>314,780,784,1417,27924,27925,45574,45575</link.rule.ids></links><search><creatorcontrib>Hyodo, Junji</creatorcontrib><creatorcontrib>Kitabayashi, Koki</creatorcontrib><creatorcontrib>Hoshino, Kenta</creatorcontrib><creatorcontrib>Okuyama, Yuji</creatorcontrib><creatorcontrib>Yamazaki, Yoshihiro</creatorcontrib><title>Fast and Stable Proton Conduction in Heavily Scandium‐Doped Polycrystalline Barium Zirconate at Intermediate Temperatures</title><title>Advanced energy materials</title><description>The environmental benefits of fuel cells and electrolyzers have become increasingly recognized in recent years. Fuel cells and electrolyzers that can operate at intermediate temperatures (300–450 °C) require, in principle, neither the precious metal catalysts that are typically used in polymer‐electrolyte‐membrane systems nor the costly heat‐resistant alloys used in balance‐of‐plant components of high‐temperature solid oxide electrochemical cells. These devices require an electrolyte with high ionic conductivity, typically more than 0.01 S cm−1, and high chemical stability. To date, however, high ionic conductivities have been found in chemically unstable materials such as CsH2PO4, In‐doped SnP2O7, BaH2, and LaH3−2xOx. Here, fast and stable proton conduction in 60‐at% Sc‐doped barium zirconate polycrystal, with a total conductivity of 0.01 S cm−1 at 396 °C for 200 h is demonstrated. Heavy doping of Sc in barium zirconate simultaneously enhances the proton concentration, bulk proton diffusivity, specific grain boundary conductivity, and grain growth. An accelerated stability test under a highly concentrated and humidified CO2 stream using in situ X‐ray diffraction shows that the perovskite phase is stable over 240 h at 400 °C under 0.98 atm of CO2. These results show great promises as an electrolyte in solid‐state electrochemical devices operated at intermediate temperatures.
Heavily proton (H+) and Sc‐doped barium zirconate is developed. Sc‐doping up to 60 at% into barium zirconate realizes fast and stable total proton conductivity over 0.01 S cm−1 at 396 °C for 200 h. The material is also stable under 0.98 atm of carbon dioxide at 400 °C over 240 h.</description><subject>Accelerated tests</subject><subject>Alloy systems</subject><subject>Barium</subject><subject>Barium zirconates</subject><subject>Carbon dioxide</subject><subject>Conductivity</subject><subject>Electrochemical cells</subject><subject>Electrolytes</subject><subject>Electrolytic cells</subject><subject>Fuel cells</subject><subject>Grain boundaries</subject><subject>Grain growth</subject><subject>heavily proton‐ and Sc‐doped barium zirconate (HSBZ)</subject><subject>high tolerance against CO 2</subject><subject>high total proton conductivity</subject><subject>Ion currents</subject><subject>Perovskites</subject><subject>Polycrystals</subject><subject>Proton conduction</subject><subject>proton trapping</subject><subject>proton‐conducting oxides</subject><subject>Scandium</subject><subject>Stability tests</subject><issn>1614-6832</issn><issn>1614-6840</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><recordid>eNqFkE9LxDAQxYsoKOrVc8DzrpOmre1R17_gP9j14qVMkwlE2mRNUqV48SP4Gf0kdlnRo6d5j_m9GXhJcsBhygHSIyTbTVNIYTRcbCQ7vODZpCgz2PzVIt1O9kN4HhnIKg5C7CTvFxgiQ6vYPGLTEnvwLjrLZs6qXkYzSmPZFeGraQc2lyNp-u7r4_PMLUmxB9cO0g8hYtsaS-wU_bhmT8ZLZzESw8iubSTfkTIrv6BuSR5j7ynsJVsa20D7P3M3ebw4X8yuJjf3l9ezk5uJzAoQkzzPsFBccd3IqhRNU-gMtZCQYVXljZZKlzloohKxpAZApJoUqbLUVAhZid3kcH136d1LTyHWz673dnxZp1kKOcBxuaKma0p6F4InXS-96dAPNYd61XG96rj-7XgMVOvAm2lp-IeuT87vbv-y3xC-hDk</recordid><startdate>20200701</startdate><enddate>20200701</enddate><creator>Hyodo, Junji</creator><creator>Kitabayashi, Koki</creator><creator>Hoshino, Kenta</creator><creator>Okuyama, Yuji</creator><creator>Yamazaki, Yoshihiro</creator><general>Wiley Subscription Services, Inc</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SP</scope><scope>7TB</scope><scope>8FD</scope><scope>F28</scope><scope>FR3</scope><scope>H8D</scope><scope>L7M</scope><orcidid>https://orcid.org/0000-0002-9375-5239</orcidid></search><sort><creationdate>20200701</creationdate><title>Fast and Stable Proton Conduction in Heavily Scandium‐Doped Polycrystalline Barium Zirconate at Intermediate Temperatures</title><author>Hyodo, Junji ; Kitabayashi, Koki ; Hoshino, Kenta ; Okuyama, Yuji ; Yamazaki, Yoshihiro</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c4603-554a6d1d1fbc983bb6f4af3c04a995bfcdf850fee8aa8eb0032feded88fe63c93</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><topic>Accelerated tests</topic><topic>Alloy systems</topic><topic>Barium</topic><topic>Barium zirconates</topic><topic>Carbon dioxide</topic><topic>Conductivity</topic><topic>Electrochemical cells</topic><topic>Electrolytes</topic><topic>Electrolytic cells</topic><topic>Fuel cells</topic><topic>Grain boundaries</topic><topic>Grain growth</topic><topic>heavily proton‐ and Sc‐doped barium zirconate (HSBZ)</topic><topic>high tolerance against CO 2</topic><topic>high total proton conductivity</topic><topic>Ion currents</topic><topic>Perovskites</topic><topic>Polycrystals</topic><topic>Proton conduction</topic><topic>proton trapping</topic><topic>proton‐conducting oxides</topic><topic>Scandium</topic><topic>Stability tests</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Hyodo, Junji</creatorcontrib><creatorcontrib>Kitabayashi, Koki</creatorcontrib><creatorcontrib>Hoshino, Kenta</creatorcontrib><creatorcontrib>Okuyama, Yuji</creatorcontrib><creatorcontrib>Yamazaki, Yoshihiro</creatorcontrib><collection>CrossRef</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>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Advanced energy materials</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Hyodo, Junji</au><au>Kitabayashi, Koki</au><au>Hoshino, Kenta</au><au>Okuyama, Yuji</au><au>Yamazaki, Yoshihiro</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Fast and Stable Proton Conduction in Heavily Scandium‐Doped Polycrystalline Barium Zirconate at Intermediate Temperatures</atitle><jtitle>Advanced energy materials</jtitle><date>2020-07-01</date><risdate>2020</risdate><volume>10</volume><issue>25</issue><epage>n/a</epage><issn>1614-6832</issn><eissn>1614-6840</eissn><abstract>The environmental benefits of fuel cells and electrolyzers have become increasingly recognized in recent years. Fuel cells and electrolyzers that can operate at intermediate temperatures (300–450 °C) require, in principle, neither the precious metal catalysts that are typically used in polymer‐electrolyte‐membrane systems nor the costly heat‐resistant alloys used in balance‐of‐plant components of high‐temperature solid oxide electrochemical cells. These devices require an electrolyte with high ionic conductivity, typically more than 0.01 S cm−1, and high chemical stability. To date, however, high ionic conductivities have been found in chemically unstable materials such as CsH2PO4, In‐doped SnP2O7, BaH2, and LaH3−2xOx. Here, fast and stable proton conduction in 60‐at% Sc‐doped barium zirconate polycrystal, with a total conductivity of 0.01 S cm−1 at 396 °C for 200 h is demonstrated. Heavy doping of Sc in barium zirconate simultaneously enhances the proton concentration, bulk proton diffusivity, specific grain boundary conductivity, and grain growth. An accelerated stability test under a highly concentrated and humidified CO2 stream using in situ X‐ray diffraction shows that the perovskite phase is stable over 240 h at 400 °C under 0.98 atm of CO2. These results show great promises as an electrolyte in solid‐state electrochemical devices operated at intermediate temperatures.
Heavily proton (H+) and Sc‐doped barium zirconate is developed. Sc‐doping up to 60 at% into barium zirconate realizes fast and stable total proton conductivity over 0.01 S cm−1 at 396 °C for 200 h. The material is also stable under 0.98 atm of carbon dioxide at 400 °C over 240 h.</abstract><cop>Weinheim</cop><pub>Wiley Subscription Services, Inc</pub><doi>10.1002/aenm.202000213</doi><tpages>5</tpages><orcidid>https://orcid.org/0000-0002-9375-5239</orcidid><oa>free_for_read</oa></addata></record> |
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subjects | Accelerated tests Alloy systems Barium Barium zirconates Carbon dioxide Conductivity Electrochemical cells Electrolytes Electrolytic cells Fuel cells Grain boundaries Grain growth heavily proton‐ and Sc‐doped barium zirconate (HSBZ) high tolerance against CO 2 high total proton conductivity Ion currents Perovskites Polycrystals Proton conduction proton trapping proton‐conducting oxides Scandium Stability tests |
title | Fast and Stable Proton Conduction in Heavily Scandium‐Doped Polycrystalline Barium Zirconate at Intermediate Temperatures |
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