| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a rapidly-chargeable lithium secondary battery capable of preventing rise of battery temperature in overcharge. <P>SOLUTION: This lithium secondary battery includes a positive electrode 6, a negative electrode 7 a separator 8 arranged between the positive electrode 6 and the negative electrode 7, and an electrolyte. In the lithium secondary battery, the positive electrode 6 includes a positive electrode collector 61, and a positive electrode active material layer 62 arranged on the positive electrode collector 61; the negative electrode 7 includes a negative electrode active material layer 72; and the thicknesses of the positive electrode active material layer 62 and the negative electrode active material layer 72 are 20-50 μm. The electrode active material layer of at least one electrode selected from the positive electrode 6 and the negative electrode 7 includes covering layers 62a and 72a arranged on the surface of the electrode; the covering layers 62a and 72a contain an insulating oxide and a resin including a thermoplastic resin having a melting point of 110-150°C; and 30-90% of the surface of the insulating oxide is covered with the thermoplastic resin. <P>COPYRIGHT: (C)2008,JPO&INPIT |
