Vapor-Mediated Infiltration of Nanocatalysts for Low-Temperature Solid Oxide Fuel Cells Using Electrosprayed Dendrites
- Sung Soo ShinSung Soo ShinDepartment of Mechanical and Aerospace Engineering, Seoul National University, 1 Gwanak-ro, Seoul 08826, Republic of KoreaGlobal Frontier Center for Multiscale Energy Systems, Seoul National University, 1 Gwanak-ro, Seoul 08826, Republic of KoreaEnergy Materials Research Center, Korea Institute of Science and Technology, 5 Hwarang-ro 14-gil, Seongbuk-gu, Seoul 02792, Republic of KoreaMore by Sung Soo Shin
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- Jeong Hun KimJeong Hun KimEmerging Materials Research Section, Electronics and Telecommunications Research Institute, 218 Gajeong-ro, Yuseong-gu, Daejeon 34129, Republic of KoreaMore by Jeong Hun Kim
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- Hyeseong JeongHyeseong JeongEnergy Materials Research Center, Korea Institute of Science and Technology, 5 Hwarang-ro 14-gil, Seongbuk-gu, Seoul 02792, Republic of KoreaMore by Hyeseong Jeong
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- Mi Young ParkMi Young ParkEnergy Materials Research Center, Korea Institute of Science and Technology, 5 Hwarang-ro 14-gil, Seongbuk-gu, Seoul 02792, Republic of KoreaMore by Mi Young Park
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- Kyung Joong YoonKyung Joong YoonEnergy Materials Research Center, Korea Institute of Science and Technology, 5 Hwarang-ro 14-gil, Seongbuk-gu, Seoul 02792, Republic of KoreaMore by Kyung Joong Yoon
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- Ji-Won SonJi-Won SonEnergy Materials Research Center, Korea Institute of Science and Technology, 5 Hwarang-ro 14-gil, Seongbuk-gu, Seoul 02792, Republic of KoreaGraduate School of Energy and Environment (KU-KIST GREEN SCHOOL), Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Republic of KoreaMore by Ji-Won Son
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- Mansoo Choi*Mansoo Choi*Email: [email protected]Department of Mechanical and Aerospace Engineering, Seoul National University, 1 Gwanak-ro, Seoul 08826, Republic of KoreaGlobal Frontier Center for Multiscale Energy Systems, Seoul National University, 1 Gwanak-ro, Seoul 08826, Republic of KoreaMore by Mansoo Choi
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- Hyoungchul Kim*Hyoungchul Kim*Email: [email protected]Energy Materials Research Center, Korea Institute of Science and Technology, 5 Hwarang-ro 14-gil, Seongbuk-gu, Seoul 02792, Republic of KoreaMore by Hyoungchul Kim
Abstract
Electrode architecturing for fast electrochemical reaction is essential for achieving high-performance of low-temperature solid oxide fuel cells (LT-SOFCs). However, the conventional droplet infiltration technique still has limitations in terms of the applicability and scalability of nanocatalyst implementation. Here, we develop a novel two-step precursor infiltration process and fabricate high-performance LT-SOFCs with homogeneous and robust nanocatalysts. This novel infiltration process is designed based on the principle of a reversible sol–gel transition where the gelated precursor dendrites are uniformly deposited onto the electrode via controlled nanoscale electrospraying process then resolubilized and infiltrated into the porous electrode structure through subsequent humidity control. Our infiltration technique reduces the cathodic polarization resistance by 18% compared to conventional processes, thereby achieving an enhanced peak power density of 0.976 W cm–2 at 650 °C. These results, which provide various degrees of freedom for forming nanocatalysts, exhibit an advancement in LT-SOFC technology.
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, 2209054. https://doi.org/10.1002/adfm.202209054