PURPOSE: To obtain a battery which has a large discharge capacity, a small self-discharge and an excellent stability to oxidation by using a P type conductive acetylene high-polymer which has a fibrous microcrystalline structure, as a positive active material, and using a light metal as a nagative active material.
CONSTITUTION: A P tyoe conductive acetylene high-polymer is used as a positive active material and is prepared by doping an acetylene high-polymer having a bulk density of 0.7∼1.2g/cm3 with a dopant such as iodine or bromine. After a positive electrode 5 made of such an active material as above is placed in a concave part provided in the lower part of a case 1, a porous circular Teflon sheet 6 is superposed on the electrode 5, and the electrode 5 and the sheet 6 are fixed by caulking with a Teflon ring 8. Next, a felt 4 is superposed on the electrode 5, and impregnated with electrolyte. After that, a negative lithium electrode 2 is placed over the felt 4, with a diaphragm 3 interposed between teh electrode 2 and the felt 4, and these are caulked with a case 7, thereby constituiting a battery. As the above electrolyte, 1 mol/l LiClO4 solution of distilled dehydrated prpylene carbonate is used. A light metal used as a negative active material may be sodium, aluminum or magnesium in addition to lithium.
KIRA MASAAKI
YAMAGUCHI KANEYA
