| 摘要 |
PURPOSE:To manufacture an nonaqueous electrolytic secondary battery excellent in low temperature charging characteristic by combining a plurality of different carbon materials together as negative electrode material. CONSTITUTION:A working electrode 1 is formed by mixing, for example, 5wt% of styrene-butadiene rubber to a carbon material powder forming the main body as binder, and press-molding it onto a titanium net 3 fixed to the inside of a positive electrode case 2 by spot welding. A counter electrode 3 is formed by pressure welding metal lithium onto a stainless net 6 fixed to the inside of a sealing plate 5 by spot welding. A polypropylene separator 7 is arranged between the working electrode 1 and the counter electrode 3. As the electrolyte, a solution of lithium hexafluoride phosphate dissolved into a mixed solvent of ethylene carbonate and diethyl carbonate. Further, a case 2 and the sealing plate 3 are sealed through a polypropylene gasket 9 between them to provide a completed battery, for example, 20mm in diameter and 1.6mm in height. Thus, a battery excellent in low temperature charging characteristic is manufactured. |
