| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a nonaqueous secondary battery having high cycle characteristics, in which an occurrence of a crack and a breakage of an anode current collector material is prevented even in a case of a big volume variation due to charge/discharge of an anode mixture layer and reliability at a time of an overcharge is enhanced, and moreover a deterioration of cycle characteristics due to a crack and breakage, etc. is prevented. <P>SOLUTION: A nonaqueous secondary battery is composed of a spiral electrode laminate winding around a cathode, an anode and a separator as well as an electrolyte. The above anode is composed of an anode mixture layer formed at least on one of the faces of a current collector material and a maximum volume variation rate shall be 8% or more after charging and after discharging of the above anode mixture layer, and a breakage elongation rate of the current collector material of the above anode shall be 5% or more. The current collector material of the above anode shall desirably have a wettability of less than 40 degrees at a contact angle in addition to the above characteristics. <P>COPYRIGHT: (C)2007,JPO&INPIT |
