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Takao NAGATOMO Mitsuyuki MITSUI Kazuhiro MATSUTANI Osamu OMOTO
A recondary battery utilizing poly(3-methylthiophene) film as a cathode-active meterial in an electrolyte of LiBE4/organic solvent with Al anode was studied. Experimental energy density of 326 Wh/kg (at a doping level of 38%, discharge capacity of 97.3 Ah/kg, and a mean discharging voltage of 3.3 V) was obtained on the weight of the film. The coulombic efficiency was above 96% even after 1200 cycles at a doping level of 9%. The discharge characteristics are described in relation to the surface morphology of the films.