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...Fuel cell development trends and future prospects noboru furusho hirao kudo hiroshi yoshioka introduction cells are classified into several types according to the type of electrolyte they use characteristics as we enter st century it is more urgent major listed in table among than ever respond energy environmental various only phosphoric acid for issues not within japan but on a global scale onsite has reached commercialization phase challenge facing fuji electric began research develop alka problem warming problems line afcs s thereafter themselves when consider researched pafcs since ing important be polymer pefcs distracted by nearsighted economic factors must this paper describes also medium long term concerns actively being distributed power units vehicular sources because their high efficiency friendliness environment early adoption new resource practical applications anticipated utilize an solution operate at temperature approximately c well suited cogenera tion systems molten s...