{"title":"Vertical heterostructures for symmetrical and reversible solid oxide fuel cells","authors":"","doi":"10.1016/j.nanoen.2024.110293","DOIUrl":null,"url":null,"abstract":"<div><div>Interfacial modification using functional metal oxides holds great potential for enhancing the electrochemical performance of solid oxide fuel cells (SOFCs). This study presents a redox-stable vertically aligned nanostructure (VAN) thin film based on a heteroepitaxial perovskite-fluorite nanocomposite prepared by pulsed laser deposition on different substrates. The self-assembled functional layers consist of alternating columns of two well-differentiated phases, (La<sub>0.8</sub>Sr<sub>0.2</sub>)<sub>0.95</sub>Fe<sub>0.8</sub>Ti<sub>0.2</sub>O<sub>3−δ</sub>-Ce<sub>0.9</sub>Gd<sub>0.1</sub>O<sub>1.95</sub> (LSFT-CGO) VAN, with multiple strained vertical interfaces. The coexistence of two immiscible phases at the nanoscale significantly extends the triple phase boundary (TPB) and reaction sites, resulting in fast electrochemical redox reactions. The LSFT-CGO VAN active layer demonstrates improved performance under both air and H<sub>2</sub> conditions, with polarization resistances of 2.9 and 75.9 Ω cm<sup>2</sup> at 650 °C, respectively. The nanoengineering design of functional metal oxides featuring hierarchical columnar architecture represents a significant step towards developing efficient energy conversion devices, particularly symmetrical and reversible SOFCs.</div></div>","PeriodicalId":394,"journal":{"name":"Nano Energy","volume":null,"pages":null},"PeriodicalIF":16.8000,"publicationDate":"2024-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Nano Energy","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2211285524010450","RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Interfacial modification using functional metal oxides holds great potential for enhancing the electrochemical performance of solid oxide fuel cells (SOFCs). This study presents a redox-stable vertically aligned nanostructure (VAN) thin film based on a heteroepitaxial perovskite-fluorite nanocomposite prepared by pulsed laser deposition on different substrates. The self-assembled functional layers consist of alternating columns of two well-differentiated phases, (La0.8Sr0.2)0.95Fe0.8Ti0.2O3−δ-Ce0.9Gd0.1O1.95 (LSFT-CGO) VAN, with multiple strained vertical interfaces. The coexistence of two immiscible phases at the nanoscale significantly extends the triple phase boundary (TPB) and reaction sites, resulting in fast electrochemical redox reactions. The LSFT-CGO VAN active layer demonstrates improved performance under both air and H2 conditions, with polarization resistances of 2.9 and 75.9 Ω cm2 at 650 °C, respectively. The nanoengineering design of functional metal oxides featuring hierarchical columnar architecture represents a significant step towards developing efficient energy conversion devices, particularly symmetrical and reversible SOFCs.
期刊介绍:
Nano Energy is a multidisciplinary, rapid-publication forum of original peer-reviewed contributions on the science and engineering of nanomaterials and nanodevices used in all forms of energy harvesting, conversion, storage, utilization and policy. Through its mixture of articles, reviews, communications, research news, and information on key developments, Nano Energy provides a comprehensive coverage of this exciting and dynamic field which joins nanoscience and nanotechnology with energy science. The journal is relevant to all those who are interested in nanomaterials solutions to the energy problem.
Nano Energy publishes original experimental and theoretical research on all aspects of energy-related research which utilizes nanomaterials and nanotechnology. Manuscripts of four types are considered: review articles which inform readers of the latest research and advances in energy science; rapid communications which feature exciting research breakthroughs in the field; full-length articles which report comprehensive research developments; and news and opinions which comment on topical issues or express views on the developments in related fields.