Seoul National Univ. DMSE
Notice

Seminar & Colloquium

Seminar & Colloquium
[세미나: 1월 9일(목), 오전 10시 30분] Prof. Sun-Ju Song, Department of Materials Science and Engineering, Chonnam National University

Title

Defect Chemical Engineering for Air Electrode Case Study: Partial Conductivity and Iso/Non-isothermal Onsager Coefficient Matrix of Ba0.95La0.05Co0.8Fe0.12Nb0.08O3-δ

 

Speaker

Prof. Sun-Ju Song, Department of Materials Science and Engineering, Chonnam National University


*Education

-  2000.09 ~ 2003.05   Univ. of Florida 재료공학 박사    

- 1997.03 ~ 1999.02   서울대학교 무기재료 석사

- 1990.03 ~ 1996.08   전남대학교 무기재료 학사    


*Professional Experience

- 2007.03 ~ 현재       전남대학교 교수    

- 2015.01 ~ 2016.02   RPI, USA 방문 과학자

- 2011.01 ~ 2012.02   Univ. of Maryland, USA 방문 부교수

- 2004.01 ~ 2007.02   Argonne National Lab. USA 박사후 연구원

- 2003.05 ~ 2003.12   Univ. of Florida, USA 박사후 연구원


| Date | Thursday, January 9th, 2025

| Time | 10:30~ 

| Venue | 33동 222호(DB 세미나실)


[Abstract]

This talk focuses on mixed-conducting perovskite oxides for efficient electrochemical reaction at air electrode of SOFC. A La and Nb co-doped BaCoO3−δ perovskite is introduced, Ba0.95La0.05Co0.8Fe0.12Nb0.08O3−δ (BLCFN) with a record-breaking oxygen ion conducting properties, surpassing all known single-phase perovskite oxide, proven by oxygen permeability. To elucidate its superior ionic conducting performance, the mass/charge transport properties and equilibrium bulk properties are investigated and quantitative indicators (DO = 5.8 × 10−6 cm2 s−1, kO = 1.0 × 10−4 cm s−1, σion = 0.93 S cm−1 at 900 °C) reveal fast diffusion and excellent surface gas-exchange kinetics. Furthermore, its defect structure was suggested with oxygen nonstoichiometry analysis.


| Host | 정우철 교수 (02-880-8030)

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