Faculty Profiles - HIBINO, Takashi

Papers - HIBINO, Takashi

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Single-chamber solid oxide fuel cells at intermediate temperatures with various hydrocarbon-air mixtures Reviewed

Hibino T, Hashimoto A, Inoue T, Tokuno J, Yoshida S, Sano M

JOURNAL OF THE ELECTROCHEMICAL SOCIETY Vol. 147 ( 8 ) page： 2888 - 2892 2000.8

Single-chamber solid oxide fuel cells at intermediate temperatures with various hydrocarbon-air mixtures Reviewed

Hibino T., Hashimoto A., Inoue T., Tokuno J.I., Yoshida S.I., Sano M.

Journal of the Electrochemical Society Vol. 147 ( 8 ) page： 2888 - 2892 2000.8

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Journal of the Electrochemical Society

The performance of a single-chamber solid oxide fuel cell (SOFC) was studied between 350 and 900 °C in flowing mixtures of methane, ethane, propane, or liquefied petroleum gas and air with a fuel/air volume ratio of one, where their oxidation proceeded safely without explosion. Among all tested electrode materials, Ni-Ce0.8Sm0.2O1.9 cermet and Sm0.5Sr0.5CoO3 oxide functioned best as the anode and cathode, respectively, in various gas mixtures. A cell constructed from a La0.9Sr0.1Ga0.8Mg0.2O3 electrolyte with the two electrodes generated>900 mV in a methane-air mixture between 600 and 800 °C and in an ethane-air mixture between 450 and 650 °C. A small electrode reaction resistance resulted in increasing power density with decreasing electrolyte thickness. The peak power density at 450 °C increased from 34 to 101 mW cm-2 with decreasing electrolyte thickness from 0.50 to 0.18 mm. The working mechanism of the single-chamber SOFC at different temperatures was also studied by measuring the catalytic activities of the two electrodes, for partial oxidation of the hydrocarbons.

DOI： 10.1149/1.1393621

Scopus

A low-operating-temperature solid oxide fuel cell in hydrocarbon-air mixtures Reviewed

Hibino T, Hashimoto A, Inoue T, Tokuno J, Yoshida S, Sano M

SCIENCE Vol. 288 ( 5473 ) page： 2031 - 2033 2000.6

A low-operating-temperature solid oxide fuel cell in hydrocarbon-air mixtures Reviewed

Hibino T., Hashimoto A., Inoue T., Tokuno J.I., Yoshida S.I., Sano M.

Science Vol. 288 ( 5473 ) page： 2031 - 2033 2000.6

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Science

The performance of a single-chamber solid oxide fuel cell was studied using a ceria-based solid electrolyte at temperatures below 773 kelvin. Electromotive forces of ~900 millivolts were generated from the cell in a flowing mixture of ethane or propane and air, where the solid electrolyte functioned as a purely ionic conductor. The electrode-reaction resistance was negligibly small in the total internal resistances of the cell. The resulting peak power density reached 403 and 101 milliwatts per square centimeter at 773 and 623 kelvin, respectively.

DOI： 10.1126/science.288.5473.2031

Scopus

A low-operating-temperature solid oxide fuel-cell in hydrocarbon-air mixtures Reviewed

Takashi Hibino, Atsuko Hashimoto, Takao Inoue, Jun-ichi Tokuno, Shin-ichiro Yoshida, Mitsuru Sano

Science Vol. 288 page： 2031-2033 2000.6

Electrochemical reduction of NO by alternating current electrolysis using yttria-stabilized zirconia as the solid electrolyte: Part I. Characterizations of alternating current electrolysis of NO Reviewed

Hibino T., Inoue T., Sano M.

Solid State Ionics Vol. 130 ( 1 ) page： 19 - 29 2000.5

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Solid State Ionics

The electrochemical promotion of the decomposition of NO in the presence of excess O2 was carried out by applying AC voltages lower than 6 V at frequencies from 0.01 to 103 Hz to a YSZ cell having two same-metal electrodes, Au, Pd, Pt or Rh. The Pd and Pt electrodes were relatively effective for this reaction. This could be explained by their electrochemical oxygen-pumping properties and catalytic activities for the reduction of NO. The promotional effect was the most enhanced at a frequency of 0.1 Hz and became larger as the concentration of NO increased or the concentration of O2 decreased. Most of the product was N2, although a small amount of N2O was observed at low conversion of NO. The comparison of AC electrolysis with DC electrolysis showed that the former had a somewhat lower current efficiency for the decomposition of NO than the latter at lower than 3 V, above which the opposite result was observed. In addition, DC electrolysis brought about a significant deterioration of the cell, but AC electrolysis did not result in such a deterioration even at a high voltage of 4 V.

DOI： 10.1016/S0167-2738(00)00581-6

Scopus

Electrochemical reduction of NO by alternating current electrolysis using yttria-stabilized zirconia as the solid electrolyte: Part II. Modification of Pd electrode by coating with Rh Reviewed

Hibino T., Inoue T., Sano M.

Solid State Ionics Vol. 130 ( 1 ) page： 31 - 39 2000.5

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Solid State Ionics

The electrochemical promotion of the decomposition of NO by applying an AC voltage to a YSZ cell having two Pd electrodes has been modified by calcining the Pd electrode at 1450 °C and then coating the obtained Pd electrode with Rh metal. The calcination of the Pd electrode at 1450 °C depressed the oxidation of Pd to PdO at temperatures lower than 800 °C. The coating of the Pd electrode with Rh increased the catalytic activity for the decomposition of NO at temperatures lower than 800 °C. As a result, these modifications enhanced the current efficiency for the decomposition of NO at low temperatures from 650 to 450 °C and at high concentrations of O2 from 2 to 13%. No negative effect on the decomposition of NO was observed in the presence of 5% water vapor and 5% CO2, while a positive effect on this reaction was found for the presence of 500 ppm CH4, C3H8 and C5H12. Based on the measurements of the selectivity for N2 over N2O and the decomposition of N2O, it was concluded that NO is reduced to N2 via intermediate N2O, especially at low temperatures.

DOI： 10.1016/S0167-2738(00)00508-7

Scopus

Electrochemical reduction of NO by alternating current electrolysis using yttria-stabilized zirconia as the solid electrolyte Part Ⅰ. characterizations of alternating current electrolysis of NO Reviewed

Takashi Hibino, Takao Inoue, Mitsuru Sano

Solid State Ionics Vol. 130 page： 19-29 2000.5

Electrochemical reduction of NO by alternating current electrolysis using yttria-stabilized zirconia as the solid electrolyte Part Ⅱ. modification of Pd electrode by coating with Rh Reviewed

Takashi Hibino, Takao Inoue, Mitsuru Sano

Solid State Ionics Vol. 130 page： 31-39 2000.5

Electrochemical reduction of NO by alternating current electrolysis using yttria-stabilized zirconia as the solid electrolyte Part I. Characterizations of alternating current electrolysis of NO Reviewed

Hibino T, Inoue T, Sano M

SOLID STATE IONICS Vol. 130 ( 1-2 ) page： 19 - 29 2000.5

Electrochemical reduction of NO by alternating current electrolysis using yttria-stabilized zirconia as the solid electrolyte Part II. Modification of Pd electrode by coating with Rh Reviewed

Hibino T, Inoue T, Sano M

SOLID STATE IONICS Vol. 130 ( 1-2 ) page： 31 - 39 2000.5

Improvement of a single-chamber solid-oxide fuel cell and evaluation of new cell designs Reviewed

Takashi Hibino, Hajime Tsunekawa, Satoshi Tanimoto, Mitsuru Sano

Journal of the Electrochemical Society Vol. 2000 page： 1338-1343 2000.4

Improvement of a single-chamber solid-oxide fuel cell and evaluation of new cell designs Reviewed

Hibino T, Tsunekawa H, Tanimoto S, Sano M

JOURNAL OF THE ELECTROCHEMICAL SOCIETY Vol. 147 ( 4 ) page： 1338 - 1343 2000.4

Improvement of a single-chamber solid-oxide fuel cell and evaluation of new cell designs Reviewed

Hibino T., Tsunekawa H., Tanimoto S., Sano M.

Journal of the Electrochemical Society Vol. 147 ( 4 ) page： 1338 - 1343 2000.4

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Journal of the Electrochemical Society

The performance of a single-chamber solid-oxide fuel cell (SOFC) made from an yttria-stabilized zirconia solid electrolyte with a 25 wt% Ce0.8Gd0.2O1.9 (GDC)-containing Ni anode and a 15 wt% MnO2-containing La0.8Sr0.2MnO3 cathode was found to be significantly enhanced by the deposition of Mn, Ga, Cr, Ce, and Lu oxide layers on the YSZ surface. In particular, the deposition of the Mn oxide layer increased the maximum power density from 161 to 213 mW cm-2 in a mixture of methane and air having a volume ratio of methane to oxygen of 1/1 at a flow rate of 300 mL min-1 (methane 52 mL min-1, oxygen 52 mL min-1, nitrogen 196 mL min-1), and at an operating temperature of 950°C. This effect was the result of the promoted anodic and cathodic reactions. Two types of cell designs were examined for the single-chamber SOFC; the two electrodes were deposited on opposite surfaces (A-type cell) and on the same face (B-type cell) of the solid electrolyte. The A-type cell showed an increasing power density with decreasing thickness of the solid electrolyte. The maximum power density was 256 mW cm-2 at a solid electrolyte thickness of 0.3 mm. The B-type cell showed an increased power density for a decreased gap between the two electrodes. The maximum power density was 143 mW cm-2 for a gap of 0.5 mm between the two electrodes. In addition, the long-term stability of the single-chamber SOFC was also studied and found to have a direct relationship with the carbon deposition on the GDC-containing Ni electrode.

DOI： 10.1149/1.1393359

Scopus

One-chamber solid oxide fuel cell constructed from a YSZ electrolyte with a Ni anode and LSM cathode Reviewed

Hibino T., Wang S., Kakimoto S., Sano M.

Solid State Ionics Vol. 127 ( 1-2 ) page： 89 - 98 2000.1

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Solid State Ionics

An excellent SOFC performance in a mixture of methane and air is achieved by constructing a one-chamber cell from a YSZ solid electrolyte with a 25 wt.% Ce0.8Gd0.2O1.9 (GDC)-added Ni anode and 15 wt.% MnO2-added La0.8Sr0.2MnO3 (LSM) cathode, which are deposited on opposite surfaces (A-type cell) or the same face (B-type cell) of the solid electrolyte. Experiments are carried out in a mixture of methane and air having a volume ratio of methane to oxygen of 1/1 at a flow rate of 300 ml min-1 (methane 52 ml min-1; oxygen 52 ml min-1; nitrogen 196 ml min-1) and at an operating temperature of 950 °C. The A-type cell shows an increasing power density with decreasing thickness of the solid electrolyte. The maximum power density is 204 mW cm-2 at a solid electrolyte thickness of 0.3 mm. The B-type cell shows an increasing power density with decreasing gap between the two electrodes. The maximum power density is 102 mW cm-2 for a gap between the two electrodes of 1 mm. The working mechanism of the one-chamber SOFC and the addition effects of GDC and MnO2 are studied using a two-chamber cell which permits independent evaluations of the Ni- and LSM-based electrodes.

DOI： 10.1016/S0167-2738(99)00253-2

Scopus

One-chamber solid oxide fuel cell constructed from a YSZ electrolyte with a Ni anode and LSM cathode Reviewed

Takashi Hibino, Shuqiang Wang, Siro Kakimoto, Mitsuru Sano

Solid State Ionics Vol. 127 page： 89-98 2000.1

One-chamber solid oxide fuel cell constructed from a YSZ electrolyte with a Ni anode and LSM cathode Reviewed

Hibino T, Wang SQ, Kakimoto S, Sano M

SOLID STATE IONICS Vol. 127 ( 1-2 ) page： 89 - 98 2000.1

総説：新しい固体電解質型燃料電池の開発

日比野高士

エコインダストリー Vol. 5 page： 5-10 2000

A novel sensor for C1-C8 hydrocarbons using two zirconia-based electrochemical cells Reviewed

Hibino T, Wang SQ

SENSORS AND ACTUATORS B-CHEMICAL Vol. 61 ( 1-3 ) page： 12 - 18 1999.12

Novel sensor for C1-C8 hydrocarbons using two zirconia-based electrochemical cells Reviewed

Hibino T., Wang S.

Sensors and Actuators, B: Chemical Vol. 61 ( 1 ) page： 12 - 18 1999.12

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Sensors and Actuators, B: Chemical

An electrochemical device for detecting various hydrocarbons at high temperatures has been fabricated by attaching two Pd|YSZ|Au cells together in which the Pd electrodes are located on the inside of the assembly. The sensing properties for C1-C6 alkanes, C2-C4 alkenes and C6-C8 aromatic hydrocarbons were investigated at 700 °C. When the sample gases containing 0-1000 ppm hydrocarbon and 250-1000 ppm oxygen were supplied to the device at a flow rate of 100 cm3 min-1, large electromotive force (EMF) values were generated from one cell and then compensated by electrochemically pumping oxygen from the other cell. The current applied to the latter cell increased with increasing hydrocarbon concentration and was not significantly affected by changing the oxygen concentration. In addition, the sensitivity to the hydrocarbons became higher as the carbon number of the hydrocarbons increased, although this did not hold for the aromatic hydrocarbons.

DOI： 10.1016/S0925-4005(99)00247-6

Scopus

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Papers - HIBINO, Takashi