Mitsubishi Electric Corporation

Mitsubishi Electric Corporation investigated alloyed catalysts, processes to produce thinner electrolytes, and increases in utilization of the catalyst layer (20). These improvements resulted in an initial atmospheric performance of 0.65 mV at 300 mA/cm or 0.195 W/cm, which is higher than the IFC performance mentioned above (presented in Table 5-2 for comparison). Note that this performance was obtained on small 100 cm cells and may not yet have been demonstrated with full-scale cells in stacks. Approaches to increase life are to use series fuel gas flow in the stack to alleviate corrosion, provide well-balanced micro-pore size reservoirs to avoid electrolyte flooding, and use a high corrosion resistant carbon support for the cathode catalyst. These improvements have resulted in the lowest PAFC degradation rate publicly acknowledged, 2 mV/1000 hours for 10,000 hours at 200 to 250 mA/cm in a short stack with 3600 cm area cells. 

Mitsubishi Electric Corporation (1981) Fire resistant liquid urethane rubber. Japan Kokai 8,161,424 Chem. Abstr.,... 

Mitsubishi Electric Corporation Instruction Manual H1-1B-041-G (1992). The Melsec-F programmable controller. 

MITSUBISHI ELECTRIC CORPORATION MMA RENEWABLE VENTURES MODINE MANUFACTURING COMPANY MOTECH INDUSTRIES INC MTI MICROFUEL CELLS INC NANOSOLAR NANOSYS INC NAVITAS ENERGY INC... 

MITSUBISHI CORP Tokyo MITSUBISHI ELECTRIC CORPORATION Tokyo PANASONIC EV ENERGY CO LTD Shizuoka SANYO ELECTRIC COMPANY LTD Osaka SHARP CORPORATION Osaka TOSHIBA CORPORATION Tokyo... 

SaTORU SHIONO, YoSHIO HANAZATO, and MaMIKO NAKAKO, Central Research Laboratory, Mitsubishi Electric Corporation, Amagasaki, Hyogo, Japan... 

Mitsubishi Electric Corporation Kamimachiya 325 Kamakura 247-0065 Japan... 

The commercialization of this type of electrode is being followed by Energy Research Corporation (ERC), International Fuel Cells Corporation and M-C Power Corporation (MCP)in the USA Brandstofel Nederland (BCN), Deutsche Aerospace AG and Ansaldo (Italy) in Europe and Hitachi, Ishikawajima-Harima Heavy Industries, Mitsubishi Electric Corporation in Japan. 

Mitsubishi Electric Corporation also developed a heat-resistant separator. Fine alumina particles were mixed with PVDF and n-methyl-2-pyrrolidone (NMP) solvents and the mixture was coated on the surface of the separator [16]. Mitsubishi reported that lithium-ion batteries with this separator showed no internal short circuit even when charged to 4.3 V and held at 150 °C. On the other hand, lithium-ion batteries with the conventional separator imderwent an internal short circuit. 

Mitsubishi Electric Corporation (MELCO), Japan, has started to develop large-scale Li-ion batteries for satellite systems since 1998, using large formatted cells. After the first flight in 2003 of an experimental satellite, named Sends-1 , over 100 battery modules have been provided not only to the MELCO standard satellite platform DS2000 series but also to the US companies, middle Asian and European countries, and had been launched successfully in LEO and GEO satellites and space transportation vehicles for the International Space Station (ISS). 

PAFCs are the first fuel cells to be commercially available. The major manufacturers of these fuel cells are UTC Power, Toshiba Corporation, HydroGen Corporation, Fuji Electric Corporation and Mitsubishi Electric Corporation. UTC Power introduced for sale a 200 kW PAFC system in 1991, and over 260 units were delivered to various customers worldwide. The design operational lifetime for these units was 40,000 h and most of the fielded units have met or exceeded this requirement A number of these units are still operational today with fleet leader at Mohegun Sun in Uncasville, Connecticut, USA, accumulating more than 76,(X)0 h [48]. Fuji s phosphoric acid fuel cell power plants, launched in 1998 have also demonstrated 40,000 h of life in field and some units after overhaul have exceeded 77,000 h of operational lifetime [1]. 

Mitsubishi Electric Corporation investigated alloyed catalysts, processes to produce thinner electrolytes, and increased utilization of the catalyst layer (20). These improvements resulted in an initial atmospheric performance of 0.65 mV at 300 mA/cm or 0.195 W/cm, which was higher than the UTC Fuel Cells performance mentioned above (presented in Table 5-2 for comparison). Note that this performance was obtained using small 100 cm cells and may not yet have been... 

Mitsubishi Electric Corporation has also demonstrated improved performances in single cells of 0.65 mV at 300mAcm. Component improvements by Mitsubishi have resulted in the lowest PAFC degradation rate publicly acknowledged, 2 mV per 1000 h for lOOOOh at 200 to 250mAcm in a short stack with 3600 cm area cells. 

Advanced Technology R D Center, Mitsubishi Electric Corporation, 8-1-1, Tsukaguchi-Honmachi, Amagasaki, Hyogo 661-8661, Japan e-mail mitani.tetsuo dr.mitsubishielectric.co.jp... 

The authors wish to special thanks to the members of Elevator Mechanical Development Section of Inazawa Works, Mitsubishi Electric Corporation for their helps and supports. 

PAFC is the most commercialised technology all over the world. Mitsubishi Electric Corporation in Japan, Fiji Electric Corporation, Toshiba Corporation and International Fuel Cell Corporation in the United States are actively engaged in improving the PAFC technology. Figure 1.15 shows the schematic of PAFC. 

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