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193 Annealing-Free Thioantimonate Argyrodites with High Li-Ion Conductivity and Low Elastic Modulus
Wo Dum Jung, Ji-Su Kim, Young Jung Kim, Hyeseong Jeong, Daseul Han, Kyung-Wan Nam, Docheon Ahn, Deok-Hwang Kwon, Hun-Gi Jung, Jong-Ho Lee, and Hyoungchul Kim
Advanced Functional Materials, 2023.3.9, Wiley, published

Although Li-ion superconducting sulfides have been developed as solid electrolytes (SEs) in all-solid-state batteries, their high deformability, which is inherently beneficial for room-temperature compaction, is overlooked and sacrificed. To solve this dilemmatic task, herein, highly deformable Li-ion superconductors are reported using an annealing-free process. The target thioantimonate, Li5.2Si0.2Sb0.8S4Br0.25I1.75, comprising bimetallic tetrahedra and bi-halogen anions is synthesized by two-step milling tuned for in situ crystallization, and exhibits excellent Li-ion conductivity (σion) of 13.23 mS cm−1 (averaged) and a low elastic modulus (E) of 12.51 GPa (aver-aged). It has a cubic argyrodite phase of ≈57.39% crystallinity with a halogen occupancy of ≈90.67% at the 4c Wyckoff site. These increased halogen occupancy drives the Li-ion redistribution and the formation of more Li vacancies, thus facilitating Li-ion transport through inter-cage pathway. Also, the facile annealing-free process provides a unique glass-ceramic structure advantageous for high deformability. These results represent a record-breaking milestone from the combined viewpoint of σion and E among promising SEs. Electrochemical characterization, including galvanostatic cycling tests for 400 h, reveals that this material displays reasonable electrochemical stability and cell performance (150.82 mAh g−1 at 0.1C). These achievements shed light on the synthesis of practical SEs suffice both σion and E requirements. 

192 Exsolution of Ru Nanoparticles on BaCe0.9Y0.1O3-δ Modifying Geometry and Electronic Structure of Ru for Ammonia Synthesis Reaction Under Mild Conditions
Hayoung Kim, Asif Jan, Deok-Hwang Kwon, Ho-Il Ji, Kyung Joong Yoon, Jong-Ho Lee, Yongseok Jun, Ji-Won Son, and Sungeun Yang
Small, 19, Wiley, published

- Green ammonia is a carbon-free energy carrier and storage medium synthesized using green hydrogen and an active catalyst. 

- The catalytic activity of ammonia synthesis can be improved by controlling the geometry and electronic structure of the active species through an exsolution process.

- Ru nanoparticles exsolved on a BaCe0.9Y0.1O3-δ support exhibit high activity and uniform size distribution, and are well-anchored to the support with in-plane epitaxy. The electronic structure of Ru is modified by in situ Ba promoter accumulation.

(Note that this is a summary of the abstract using chatGPT)

191 An Unprecedented Vapor-Phase Sintering Activator for Highly Refractory Proton-Conducting Oxides
Hyegsoon An, Seunghyeok Im, Junseok Kim, Byung-Kook Kim, Ji-Won Son, Kyung Joong Yoon, Hyoungchul Kim, Sungeun Yang, Hyungmook Kang, Jong-Ho Lee, Ho-Il Ji
ACS Energy Letters, 7, 2022.10.21, ACS Publications, published

190 Exploration of a Ce0.65Zr0.25Pr0.1O2−δ-Based Electrocatalyst That Exhibits Rapid Performance Deterioration Despite Its High Oxygen Storage Capability
Seol Hee Oh, Eun Hui Park, Hyun-Kyu Kim, Jason Kim, Hee-Sung Yoon, Yeong-Cheol Kim, Sun-Young Park, Sungeun Yang, Ho-Il Ji, Kyung Joong Yoon, Ji-Won Son, Jong-Ho Lee
ACS Appl. Energy Mater, 5, 2022.07.14, published

189 The proton uptake process in double perovskite triple ionic-electronic conducting oxides for protonic ceramic cells
Seunghyeok Im, Muhammet Ali Berk, Sungeun Yang, Byung-Kook Kim, Kyung Joong Yoon, Ji-Won Son, Jong-Ho Lee, Ho-Il Ji
J. Mater. Chem. A, 10, 2022.07.07, published

188 Tailoring shape and exposed crystal facet of single-crystal layered-oxide cathode particles for all-solid-state batteries
Hoyeol Jeon, Deok-Hwang Kwon, Hyoungchul Kim, Jong-Ho Lee, Yongseok Jun, Ji-Won Son, Sangbaek Park
Chemical Engineering Journal, 445, 2022.05.12, published


187 Construction of high-temperature electronic conduction paths for the scale-up of solid oxide fuel cell technology
Mi Young Park, Sun-Young Park, Haewon Seo, Jin-Mook Jung, Hyo Ki Hwang, Jongsup Hong, Jun-Young Park, Insung Lee and Kyung Joong Yoon
Journal of Materials Chemistry A, 10, 2022.05.09, published

186 Improved strontium segregation suppression of lanthanum strontium cobalt oxide cathode via chemical etching and atomic layer deposition
Dong Hwan Kim, Sungeun Yang, Deok-Hwang Kwon, Ho-Il Ji, Ji-Won Son, Joon Hyung Shim
International Journal of Energy Research, 46, 2022.05.01, published

185 Surface-roughened current collectors for anode-free all-solid-state batteries
Donghee Gu, Hyoungchul Kim, Jong-Ho Lee, Sangbaek Park
Journal of Energy Chemistry, 70, 2022.03.19, published

184 Facile Method for the Formation of Intimate Interfaces in SulfideBased All-Solid-State Batteries
Bin-Na Yun, Seongsoo Lee, Wo Dum Jung, Hyeon-Ji Shin, Jun Tae Kim, Seungho Yu, Kyung Yoon Chung, Hyoungchul Kim*, and Hun-Gi Jung*
ACS Applied Materials&Interfaces, 14, 2022.02.14, published

183 Crack-free cathode of intermediate-temperature solid oxide fuel cells via electrospray deposition
Guangmin Li, 김정훈, 손지원, 최만수, 김형철, 신성수
International Journal of Applied Ceramic Technology, 19(1), 241-248, 2022.01, published

182 A comprehensive investigation of direct ammonia-fueled thin-film solid-oxide fuel cells: Performance, limitation, and prospects
Seongkook Oh, Min Jun Oh, Jongsup Hong, Kyung Joong Yoon, Ho-Il Ji, Jong-Ho Lee, Hyungmook Kang, Ji-Won Son, Sungeun Yang
iScience, 25, 2022-09-16, Cell Press, published

암모니아(NH3) 에너지 밀도가 높고 연소시 이산화탄소 배출이 없어 각광받는 수소 (혹은 에너지) 운반체이다. 암모니아를 연료로 사용하여 전기 에너지를 생산할 수 있는 기술 중 고체산화물 연료전지 (SOFC) 가 있다. SOFC는 니켈이 풍부한 연료극 구조와 높은 작동 온도를 가지고 있어 암모니아 연료를 셀에 직접 주입하여 사용할 수 있다. 750도 이상의 높은 작동온도를 가지는 기존의 SOFC는 별도의 셀구조 변화 없이 직접 암모니아 운전이 가능하다. 작동 온도를 낮추면 암모니아 연료 SOFC의 응용 분야가 다양해질 수 있어 그에 대한 연구를 진행하였다. 본 연구에서는 500~650°C 온도에서 두 가지 유형의 박막형 SOFC(TF-SOFC)를 사용하여 직접 암모니아 작동을 테스트하고 이를 상용 SOFC와 비교하였다. NiO-GDC 연료극을 가진 TF-SOFC는 650도에서 1330mW cm-2의 최대 전력 밀도를 보였고 이는 현재까지 보고된 최고수준의 암모니아 연료 SOFC 성능이다. 그러나 NH3 운전시의 성능은 동일한 셀을 이용한 H2 운전시의 성능과 큰 차이가 존재했다. 전기화학 임피던스 분석, 암모니아 전환율 분석 및 2D multiphysics 모델링을 통해 저온에서 낮은 암모니아 전환율이 성능 격차의 주요 원인임을 확인하였다. 따라서 암모니아 전환율을 높일 수 있는 암모니아 분해 촉매를 도입하면 저온형 직접 암모니아 SOFC의 성능을 개선시킬 수 있으리라 기대된다. 

181 Highly efficient and robust Pt ensembles on mesoporous alumina for reversible H2 charge and release of commercial benzyltoluene molecules
Jinho Oh, Yeongin Jo, Tae Wan Kim, Hari Babu Bathula, Sungeun Yang, Joon Hyun Baik, Young-Woong Suh
Applied Catalysis B: Environmental, 305, 2022-05-15, Elsevier, published


180 Revisiting the LiPON/Li thin film as a bifunctional interlayer for NASICON solid electrolyte-based lithium metal batteries
이승환, 정세훈, 양성은, 이종호, 신현정, 김주선, 박상백
Applied Surface Science, Accepted, Elsevier, in press


179 Theoretical Analysis of Reversible Phase Evolution in Li-Ion Conductive Halides
김지수, 신성수, 이종호, 김병국, 김형철
Applied Surface Science, 574, February 2022, Elsevier, published

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