Proton conductor and method for manufacturing thereof, and fuel cell

摘要

A fullerene derivative obtained by introducing one or more proton releasable groups such as -OH group or -SO3H group to a fullerene molecule is used as the proton conductor. Because the proton conductor is used over a wide temperature range including the room temperature under a dry condition, the atmosphere in which the fuel cell is used is not restricted, and the fuel cell is made small sized and simple.