• Journal of the Korean Applied Science and Technology
• /
• v.29 no.1
• /
• pp.102-107
• /
• 2012

The recovery of a Pt anode in a PEMFC through 30 ppm $H_2S/H_2$ exposure was evaluated by using a cyclic voltametry(CV) scan. First, the PEMFC unit cell performanc loss was measured three times under an anode feeding with 30 ppm $H_2S/H_2$ for 1hr at $0.5A/cm^2$ of current density. The initial cell performance was $1.16A/cm^2$ at 0.6 V without $H_2S$ poisoning. After first poisoning step for 1hr the cell performance was decrease to $0.77A/cm^2$, and the further poisoning steps decreased up 0.57 V. Finally, the recovery of the cell performance of $H_2S$ poisoned PEMFC was achieved up to 90.3% by applying CV scan. Moreover, we also found out that another possible approach for over 80% recovery of the cell performance of $H_2S$ poisoned anode Pt catalyst layer was to just inject fresh hydrogen into the anode feeding stream.

• Electrical & Electronic Materials
• /
• v.9 no.9
• /
• pp.949-953
• /
• 1996

In this paper, the cathode materials of solid oxide fuel cell were fabricated, and the analysis of TG/DTA, XRD, thermal expansion and electric conductivity were investigated. As a result, thermal expansion coefficient of LSM was not quite different from that of electrolyte. And the performance of LSM(x=0.4) was more excellent than the others.

• 유체기계공업학회:학술대회논문집
• /
• 2001.11a
• /
• pp.373-380
• /
• 2001

Solid Oxide Fuel Cells (SOFCs) have received considerable attention because of the advantages of high effiiciency, low pollution, cogeneration application and excellent integration with simplified reformer In this paper, we reported development of anode-tubular SOFC by wet process. For making tubular cell, Ni-cermet YSZ anode tube was fabricated using extrusion process, and YSZ electrolyte layer and LSM-YSZ composite, LSM, LSCF cathode layer were coated onto the anode supported tube using slurry dipping process and sintered by co-firing process. By using this tubular cell, we fabricated single cell consisted of the various cathode layers and 4 cell stack with an effective area of $75 cm^2$ per single cell, and evaluated their performance characteristics.

• Journal of Energy Engineering
• /
• v.20 no.4
• /
• pp.309-317
• /
• 2011

The effect of physical properties of coal fuels and carbon particle on performance of DCFC (Direct Carbon Fuel Cell) was investigated. Shenhua and Adaro were selected as coal fuel and carbon particle was used for comparing with coal. The Ultimate, proximate, SEM, XRD, and BET analysis of samples were conducted. The component of char was more important than that of raw coal because the operating temperature of reactor is higher than devolatilization region of coal. The surface area and volume of pores affected significantly the performance of the system than content of fixed carbon or char rates. The performance of DCFC with carbon particle was in proportional to working temperature.

• Proceedings of the Korea Society for Energy Engineering kosee Conference
• /
• 2001.11a
• /
• pp.263-266
• /
• 2001

• 한국전기화학회:학술대회논문집
• /
• 2001.04a
• /
• pp.46-46
• /
• 2001

• 한국전기화학회:학술대회논문집
• /
• 2004.04a
• /
• pp.9-9
• /
• 2004

• Proceedings of the Materials Research Society of Korea Conference
• /
• 1999.05a
• /
• pp.93-93
• /
• 1999

• Proceedings of the Materials Research Society of Korea Conference
• /
• 2002.11a
• /
• pp.24-24
• /
• 2002

• Proceedings of the Korean Society of Precision Engineering Conference
• /
• 2012.10a
• /
• pp.593-594
• /
• 2012