Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Naoto Torata0
Takehito Mitate0
Tsutomu Sada0
Yumiko Takashima0
Kazunari Takeda0
Kazuo Yamada0
Motoaki Nishijima0
Naoto Nishimura0
Date of Patent
July 3, 2007
0Patent Application Number
103815160
Date Filed
September 28, 2001
0Patent Primary Examiner
Patent abstract
A lithium secondary battery which comprises a negative electrode, a positive electrode, and disposed therebetween a polymer electrolyte comprising an ionically conductive polymer. The polymer electrolyte has a two-layer structure composed of a positive-electrode-side layer and a negative-electrode-side layer. The polymer electrolyte on the positive-electrode side contains a nonaqueous electrolytic solution containing a lithium salt in a higher concentration than that in the polymer electrolyte on the negative-electrode side. The battery is improved in charge/discharge cycling characteristics and high-load discharge characteristics.
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