LITHIUM ION SECONDARY BATTERY
To provide a lithium ion secondary battery which is long in life, short in the permeation time of an electrolyte solution and initial charging time, and high in production efficiency.SOLUTION: A lithium ion secondary battery comprises a positive electrode, a negative electrode, an electrolyte soluti...
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| Format: | Patent |
| Sprache: | eng ; jpn |
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| Zusammenfassung: | To provide a lithium ion secondary battery which is long in life, short in the permeation time of an electrolyte solution and initial charging time, and high in production efficiency.SOLUTION: A lithium ion secondary battery comprises a positive electrode, a negative electrode, an electrolyte solution, and a nonwoven fabric separator. In the lithium ion secondary battery, the electrolyte solution-holding rate of the nonwoven fabric separator is 100% or more, and the quantity of the electrolyte solution is 110% or more and 250% or less to a sum total of a pore volume of the positive and negative electrodes, and a separator volume.SELECTED DRAWING: None
【課題】本発明の課題は、長寿命でかつ電解液の浸透時間や初回充電時間が短く、製造効率の高いリチウムイオン二次電池を提供することにある。【解決手段】正極、負極、電解液及び不織布セパレータを含むリチウムイオン二次電池において、不織布セパレータの電解液保液率が１００％以上であり、正極及び負極の空孔体積とセパレータ体積の合計に対する電解液量が１１０％以上２５０％以下であることを特徴とするリチウムイオン二次電池。【選択図】なし |
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