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Title:
POWER STORAGE DEVICE
Document Type and Number:
WIPO Patent Application WO/2015/005294
Kind Code:
A1
Abstract:
　Provided is a power storage device having high energy density, low resistance, and high durability. A power storage device provided with: an electrode unit in which a positive electrode on which a positive-electrode active-substance layer is formed and a negative electrode on which a negative-electrode active-substance layer is formed are layered in alternating fashion interposed by a separator, and an electrolyte made from an aprotic organic solvent electrolyte solution of a lithium salt. The expressions 0.35 ≤ a/b ≤ 0.95, 0.55 ≤ b/c ≤ 1.00, and 0.35 ≤ a/c ≤ 0.55 hold, where a is the cell capacity (mAh) when the power storage device is discharged from a fully charged state to a voltage that is half the fully charged voltage in 0.75 to 1.25 hours, b is the full negative-electrode capacity (mAh) when the negative electrode in the fully charged state is discharged to the point at which the negative electrode potential reaches 1.5 V (Li/Li+), and c is the total negative-electrode charge capacity (mAh) when the negative electrode at 0V is subjected to constant current, constant voltage (CCCV) charging over 12 hours. The electrode density of the positive-electrode active-substance layer is 0.54-0.7 g/cm3, and the electrode weight of the positive-electrode active-substance layer is 70-110 g/m2.

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Inventors:
TEZUKA TERUAKI (JP)
ANDO NOBUO (JP)
Application Number:
PCT/JP2014/068090
Publication Date:
January 15, 2015
Filing Date:
July 07, 2014
Export Citation:
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Assignee:
JM ENERGY CORP (JP)
International Classes:
H01G11/26; H01G11/06; H01M2/14; H01M4/13; H01M4/133; H01M4/70; H01M10/052; H01M10/0566; H01M10/0585; H01M10/0587
Foreign References:
JP2009260187A2009-11-05
JP2007116101A2007-05-10
JP2010267878A2010-11-25
JP2008294314A2008-12-04
Attorney, Agent or Firm:
SENMYO, Kenji et al. (JP)
Spring name Kenji (JP)
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