신소재공학과

Seminar

Extra Form
Date 20180725

■ Title             : Dynamic Control and in-situ Measurements of Oxygen Nonstoichiometry and Phase of Layered Cuprate-based Thin Films by Electrochemical Pumping

 

■ Speaker         :  Dr. Chang Sub Kim 


■ Date and Time
 :  7/25 (Wed) 1:30 PM 

 

■ Venue           :  Applied Engineering Buliding (W1-1) Seminar Room #2

 

■ H o s t           :  Prof. Woo Chul Jung

 

■ Abstract :    

Three major criteria are essential for a good solid oxide fuel cell (SOFC) electrode: 1) mixed ionic and electronic conductivity, 2) electrocatalytic activity towards oxygen surface exchange reaction, and 3) chemical and chemo-mechanical stability. Conventional method of assessing these electro-chemo-mechanical properties requires doping different concentrations of aliovalent cations and/or controlling atmosphere. These, however, are constrained by solubility limits of dopants, the range of oxygen partial pressures readily experimentally achievable, and require knowledge of the applicable defect chemical model. In this study, we control and measure oxygen defect types, concentrations, and phases in promising rare earth cuprate (RE2CuO4: RE = rare earth) SOFC cathode materials by electrochemical pumping of oxygen through an yttria-stabilized zirconia supporting electrolyte. These layered perovskites can incorporate both oxygen interstitials and vacancies, as well as two different crystal structures – T and T’ – depending on the Cu-O coordination, thereby broadening the range of investigations. Oxygen nonstoichiometry values and crystal structures are determined by in-situ measurement of chemical capacitance and x-ray diffraction, respectively, and are correlated with surface kinetics, in-plane conductivities, ionic diffusivities, and chemo-mechanical properties.


List of Articles
No. Category Subject Author Date Views
Notice Special 11/14 (Wed) Prof. Hui-Ming Cheng (Director and Professor, Tsinghua University, IMR CAS) ADMINI 2018.11.13 14
Notice Special 11/20 (Tue) Prof. Alfonso H. W. Ngan (Department of Mechanical Engineering, University of Hong Kong) file ADMINI 2018.11.13 11
Notice Regular 11/13 (Tue) Dr. Kang-Wook Lee (SK Hynix) ADMINI 2018.11.13 10
Notice Regular 11/6 (Tue) Prof. Dongchan Jang (KAIST NQE) ADMINI 2018.11.02 114
Notice Special 11/2 (Fri) Dr. Sungbong Park (Intel Corporation) ADMINI 2018.10.30 148
Notice Regular 10/30 (Tue) Dr. Myung-Il Park (Korea Technology Finance Corporation) ADMINI 2018.10.26 101
275 Regular 10/23 (Tue) Dr. Sang-Soo Han (H&P International Patent & Law Office) ADMINI 2018.10.19 94
274 Regular 10/2 (Tue) Prof. Dohwan Kim (Hanyang Univ.) ADMINI 2018.10.01 254
273 Regular 9/18 (Tue) Prof. Seong Jun Kang (Kyung Hee Univ.) ADMINI 2018.09.17 343
272 Regular 9/11 (Tue) Dr. Byeongdu Lee (Argonne National Laboratory) ADMINI 2018.09.07 416
271 Regular 9/4 (Tue) Prof. Kibum Kang (Department of MSE, KAIST) ADMINI 2018.09.03 405
270 Regular 8/28 (Tue) Prof. Kyung-Min Kim (Department of MSE, KAIST) ADMINI 2018.08.24 438
269 Special 8/24 (Fri) Prof. Joel W. Ager III (UC Berkeley, Lawrence Berkeley National Laboratory) file ADMINI 2018.08.20 375
268 Special 8/23 (Thu) Prof. Jeehwan Kim (MIT, USA) file ADMINI 2018.08.20 310
267 Special 8/23 (Thu) Prof. YANGUANG LI (Soochow University) file ADMINI 2018.08.20 202
» Special 7/25 (Wed) Dr. Chang Sub Kim (Department of MSE, MIT) ADMINI 2018.07.24 434
265 Special 7/13 (Fri) Prof. Dong Ryeol Whang (Johannes Kepler University Linz, Austria) file ADMINI 2018.07.09 411
264 Regular 6/5 (Tue) Prof. Sunghwan Lee (Baylor University) ADMINI 2018.06.05 593
263 Regular 5/29 (Tue) Prof. Sang Ho Oh (Yonsei Univ. College of Medicine) ADMINI 2018.05.29 576
262 Regular 5/15 (Tue) Prof. Myung Gil Kim (Dept. of Chemistry, Chung-Ang Univ.) ADMINI 2018.05.15 788
Board Pagination ‹ Prev 1 2 3 4 5 6 7 8 9 10 ... 15 Next ›
/ 15

Designed by sketchbooks.co.kr / sketchbook5 board skin

나눔글꼴 설치 안내


이 PC에는 나눔글꼴이 설치되어 있지 않습니다.

이 사이트를 나눔글꼴로 보기 위해서는
나눔글꼴을 설치해야 합니다.

설치 Cancel

Sketchbook5, 스케치북5

Sketchbook5, 스케치북5

Sketchbook5, 스케치북5

Sketchbook5, 스케치북5