| 摘要 |
PURPOSE:To enhance dischrge capacity and cycle life characteristics by using an electrode in which smashed carbon fibers each of which has the interplanar spacing (d002) of 3.38 to 3.56Angstrom by X-ray diffraction, are heattreated under a non-oxidizing environment so as to be molded, as a lithium absorbent negative electrode. CONSTITUTION:After carbon fibers each of which has the interplanar spacing (d002) of 3.38 to 3.56Angstrom by X-ray diffraction, have been smashed, an electrode which is formed in such way that the smashed carbon fibers are heattreated at temperature of 800 to 1500 deg.C under a non-oxidizing environment so as to be molded, is used as a lithium absorbent negative electrode. For example, carbon fibers in a pitch series each of which is roughly 8mum in size while having the interplanar specing (d002) of 3.38 to 3.56Angstrom , are smashed into particles roughly 2mum in average size means of ball milling, the carbon particles after smashing are heattreated for about 2 hours at the temperature of 1000 deg.C under an argon environment, 96% carbon particles by weight and 4% teflon binder by weight are then mixed together so as to be formed thereafter into the electrode in sheet shape which is 1cm<2> and is 0.15mm in thickness. By this constitution, a lithium cell thereby be provided, the discharge capacity and cycle life characteristics of which are enhanced. |
