Investigation on Diffusion Interaction and Electrical Properties of Perovskite Anode with Cerium-Based Materials

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Project title

Code/計畫編號

NSC102-2221-E019-010

Translated Name/計畫中文名

鈰基材料在鈣鈦礦陽極之擴散作用及電性研究

Project Coordinator/計畫主持人

Horng-Yi Chang

Funding Organization/主管機關

National Science and Technology Council

Department/Unit

Department of Marine Engineering

Website

https://www.grb.gov.tw/search/planDetail?id=3098425

Year

2013

Start date/計畫起

01-08-2013

Expected Completion/計畫迄

31-07-2014

Bugetid/研究經費

828千元

ResearchField/研究領域

材料科技

"摻雜或添加離子導電性 Ce 化合物在鈮鈦酸鍶鑭(SLTN)陽極可以有效提升其電觸媒活性，然而控制 Ce在鈦酸鍶晶格的溶解/析出與其分佈將是決定影響電觸媒特性的關鍵，控制 Ce4+/Ce3+氧化還原偶之性質，可以用來改善氧化還原特性以影響電觸媒活性。本研究製備摻雜鈦酸鍶陽極(Sr0.7La0.3)(Ti0.9Nb0.1)O3-δ，(SLTN)，利用水熱或溶液蒸發法將 CeO2披覆在 SLTN顆粒形成核-殼結構，進行氧化、還原氣氛熱處理，分析鈰離子在鈦酸鍶結構的溶解/析出與擴散作用研究；探討增進 SLTN陽極的導電性與電觸媒特性之機制與對結構之穩定性。製備分散的披覆顆粒殼層至完全包覆殼層；研究鈰離子擴散程度對TPB作用面積與延伸長度在電觸媒與電子傳輸之機制。進一步研究重點以 SLTN 陽極支撐，網印 LSBC電解質稀釋漿料在燒結多孔 SLTN上，使用傳統與微波熱處理，探討薄層 LSBC粒子披覆 SLTN半電池共燒匹配性與鈰離子在 SLTN/LSBC之界面擴散性，鑑定熱膨脹及共燒的結晶結構與顯微結構，探討可控制的鈰離子擴散如何獲得高導電性與電觸媒特性的半電池界面三相邊界，以及薄層 LSBC 電解質如何提升 SOFC 結構的電氣特性。""The Ce-based compound doped or added (Sr0.7La0.3)(Ti0.9Nb0.1)O3-δ, (SLTN), shows promotion of electroactivity. However, the key point in determining the electroactivity is how to control the Ce dissolution/precipitation as well as the Ce distribution in strontium titanate lattice. Controll Ce4+/Ce3+ redox couple transition can improve the reduction-oxidation properties as to affect the electroactivity of strontium titanate. In this study, the SLTN is prepared first, then the hydrothermal or solution evaporation method is utilized to deposit the CeO2 on SLTN to form core-shell structure. Such structure is subjected to heat-treatment in reduction/oxidation atmosphere. Ce ions dissolution/precipitation and diffusion in strontium titanate will be analyzed to investigate the mechanism of conduction, electroactivity enhancement and structure stability. From the discrete particle coating shell to completely enclosed coating shell on SLTN, the cerium ions diffusion to the TPB effective area and the TPB length extension on electroactivity and electron transition are all studied. Sequentially, the SLTN anode support is used to print LSBC electrolyte slurry on such porous anode SLTN. The SLTB/LSBC half cell is processed by conventional sintering and microwave sintering in air. The thin layered LSBC particles coated SLTN half cell is investigated for the sintering compatibility and cerium interface diffusion at SLTN/LSBC. The thermal expansion and co-sintered crystal structure and microstructure are characterized. How the under-controlled cerium ions diffusion to achieve high conduction and electroactivity of strontium titanate anode will be studied. Furthermore, the study on thin layered LSBC electrolyte to promote the SOFC electrical properties is also investigated."

Keyword(s)

電觸媒活性
Ce化合物
溶解/析出
微波熱處理
electroactivity
Ce compound
dissolution/precipitation
microwave sintering

DSpace CRIS

Investigation on Diffusion Interaction and Electrical Properties of Perovskite Anode with Cerium-Based Materials

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