• Title/Summary/Keyword: Solid oxide cells

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Development of Ionomer Binder Solutions Using Polymer Grinding for Solid Alkaline Fuel Cells (고분자 분쇄 기술을 활용한 고체 알칼리연료전지용 이오노머 바인더 용액 개발)

  • Shin, Mun-Sik;Kim, Do-Hyeong;Kang, Moon-Sung;Park, Jin-Soo
    • Journal of the Korean Electrochemical Society
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    • v.19 no.3
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    • pp.107-113
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    • 2016

  • In this study, an anion-exchange ionomer solution was prepared by grinding poly(2,6-dimethyl-1,4-phenylene oxide) (PPO) in liquid nitrogen for solid alkaline fuel cells (SAFCs). Type of quaternized PPO (QPPO) solutions was controlled by grinding time. The ionomer binder solutions were characterized in terms of dispersity, particle size, and electrochemical properties. As a result, ionomer binder solutions using grinded polymer showed higher dispersion and smaller particle size distribution than that using non-grinded polymer. The highest ionic conductivity and IEC of the membrane recast by using BPPO-G120s were $0.025S\;cm^{-1}$ and $1.26meq\;g^{-1}$, respectively.

  • https://doi.org/10.5229/JKES.2016.19.3.107 인용 PDF KSCI

Numerical Study on Oxygen Depletion Characteristics of Porous Cathodes in Anode-Supported Solid Oxide Fuel Cells (음극지지 고체산화물 연료전지 다공성 양극에서의 산소고갈 특성에 관한 수치해석 연구)

  • Shin, Dongwoo;Nam, Jin Hyun;Kim, Charn-Jung
    • Transactions of the Korean Society of Mechanical Engineers B
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    • v.41 no.4
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    • pp.257-268
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    • 2017

  • This paper proposes an efficient two-dimensional simulation model for solid oxide fuel cells (SOFCs) based on the electrochemical effectiveness model. The effectiveness model is known to accurately predict the current generation performance of SOFC electrodes, by considering the complex reaction/transport processes that occur within thin active functional layers near the electrolyte. After validation tests, the two-dimensional simulation model was used to calculate the distribution of current density and oxygen concentration transverse to the flow channel in anode-supported SOFCs, with which the oxygen depletion characteristics were investigated in detail. In addition, simulations were also conducted to determine the minimum number of grids required in the transverse direction to efficiently obtain accurate results.

  • https://doi.org/10.3795/KSME-B.2017.41.4.257 인용 PDF KSCI