http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
알칼리용액에서 La0.8Sr0.2MnO3 페롭스카이트 촉매의 산소환원 및 발생반응에서 도전재의 영향
심중표,로페즈 카린,양진현,선호정,박경세,엄승욱,이홍기 한국수소및신에너지학회 2016 한국수소 및 신에너지학회논문집 Vol.27 No.3
The effects of conductive additives in a La0.8Sr0.2MnO3 perovskite bifunctional electrode for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) were investigated in an alkaline solution. Highly porous carbon black (CB) and Ni powder were added to the bifunctional electrodes as conductive additives. The surface morphologies of electrodes containing CB and Ni were observed by scanning electron microscopy (SEM). The current densities for both ORR and OER were changed by the addition of CB. The conductive additive changed physical properties of bifunctional electrodes such as the sheet conductance, gas permeability and contact angle. It was observed that the air permeability of electrode was most effective to enhance the currents for ORR and OER.
심중표,한춘수,선호정,박경세,이지정,이홍기 한국수소및신에너지학회 2012 한국수소 및 신에너지학회논문집 Vol.23 No.1
Gas diffusion layers (GDLs) of carbon composite type in polymer electrolyte fuel cells were prepared by simple and cheap manufacturing process. To obtain the carbon composite GDLs, carbon black with polymer binder was mixed in solvent, rolled to make sheet, and finally heat-treated at 340℃. The performance of fuel cell using composite GDLs was changed by PTFE content. The physical properties of composite GDLs for pore,conductivity and air permeability were analyzed to compare with the variation of fuel cell performance. The conductivity of composite GDLs was very similar to carbon paper as commercial GDL but pore properties and air flux were considerably different. The porosity, PTFE content and conductivity for composite GDLs did not have an influence on the cell performance much. The increase of pore diameter and air flux led to enhance cell performance.
알칼리형 연료전지용 La<sub>1-x</sub>Ca<sub>x</sub>CoO<sub>3</sub> 기체확산전극의 산소환원반응
심중표,박용석,이홍기,박수길,이주성,Shim, Joong-Pyo,Park, Yong-Suk,Lee, Hong-Ki,Park, Soo-Gil,Lee, Ju-Seong 한국공업화학회 1996 공업화학 Vol.7 No.5
Citrate process로 제조한 $La_{1-x}Ca_xCoO_3$에서 Ca이 20mole% doping된 perovskite oxide가 산소환원반응에 대해 가장 높은 전류밀도와 specific activity를 보여주었으며 cyclic voltammogram에서 carbon만으로 제조된 전극에서보다 carbon과 Perovskite oxide를 혼합한 전극에서 높은 산소흡착/탈착전류를 보였다. 입자크기분포와 소결효과에 의해 $900^{\circ}C$, 5시간 공기중에서 소결한 $La_{0.8}Ca_{0.2}CoO_3$가 산소환원반응에 대한 전기화학적 촉매특성이 우수하였다. The $La_{0.8}Ca_{0.2}CoO_3$ prepared by a citrate process was shown to have higher oxygen reduction current density and specific activity than $LaCoO_3$, $La_{0.6}Ca_{0.4}CoO_3$. In the cyclic voltammogram, an oxygen desorption peak of a $La_{0.8}Ca_{0.2}CoO_3$+carbon electrode was larger than that of a only carbon electrode. $La_{0.8}Ca_{0.2}CoO_3$ sintered at $900^{\circ}C$ for 5 hours was shown high oxygen reduction current density because of the particle size distribution and sintering effect.