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AssigneeKabushiki Kaisha Toshiba
InventorsMasahiro Sekino, Asako Sato, Jun Momma, Masayuki Oguchi
Estimating the term…
The present invention provide a nonaqueous electrolyte comprising a nonaqueous solvent, wherein the nonaqueous solvent includes ethylene carbonate (EC), propylene carbonate (PC), γ-butyrolactone (GBL) and a fourth component that is a solvent other than the EC, the PC and the GBL, and the nonaqueous solvent satisfies the following equations (1) to (4): 1 15 ≦ x ≦ 50 (1) 30 ≦ y ≦ 75 (2) 0 < z < 30 (3) 0 < p ≦ 5 (4) where, the x is a ratio (volume %) of ethylene carbonate to a total volume of the nonaqueous solvent, the y is a ratio (volume %) of propylene carbonate to the total volume of the nonaqueous solvent, the z is a ratio (volume %) of γ-butyrolactone to the total volume of the nonaqueous solvent, and the p is a ratio (volume %) of the fourth component to the total volume of the nonaqueous solvent.
A nonaqueous electrolyte comprising:
A nonaqueous electrolyte comprising:
A nonaqueous electrolyte secondary battery, comprising:
A nonaqueous electrolyte secondary battery, comprising:
Dependencies are inferred from the claim text.
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Liquid materials: characterised by the solvents
Accumulators with non-aqueous electrolyte: li-accumulators
Non-aqueous electrolytes: organic electrolyte
Mixture of solvents: four or more solvents
Term end not estimated
This application is based upon and claims the benefit of priority from the prior Japanese Patent Applications No. 2001-329950, filed Oct. 26, 2001, the entire contents of which are incorporated herein by reference.
1. Field of the Invention
The present invention relates to a nonaqueous electrolyte and a nonaqueous electrolyte secondary battery.
The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate presently embodiments of the invention, and together with the general description given above and the detailed description of the embodiments given below, serve to explain the principles of the invention.
FIG. 1 is a sectional view showing a thin lithium ion secondary battery that is an example of a nonaqueous electrolyte secondary battery according to the present invention.
FIG. 2 is an enlarged sectional view showing an A portion of FIG. 1.
A nonaqueous electrolyte secondary battery according to the present invention includes a case, an electrode group which is accommodated in the case, and a nonaqueous electrolyte which is held by the electrode group and contains a nonaqueous solvent.
For the nonaqueous solvent, for instance, any one of (A) and (B) described in the following is used.
(A) Nonaqueous Solvent A