IP Library Granted Patent US 8,216,726
Granted Patent B2
US 8,216,726 · App. 12/330,712 · Granted Jul 10, 2012

Battery

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Quick Facts
Patent No.
US 8,216,726
App. No.
12/330,712
Granted
Jul 10, 2012
Kind
B2
Abstract

A battery is provided. The battery includes an electrolytic solution, a positive electrode and a negative electrode. The negative electrode has a negative electrode active material layer containing a carbon material and having a thickness per one face of 70 μm or more and not more than 120 μm. The electrolytic solution contains a solvent containing 15% by mass or more and not more than 30% by mass of a cyclic carbonate represented by the following formula (1): wherein R 1 to R 4 each independently represents hydrogen, a halogen, an alkyl group or a halogenated alkyl group. A mass content ratio (B/A) of a halogenated cyclic carbonate (B % by mass) contained in the cyclic carbonate (A % by mass) which is represented by the formula (1) being from 0.5 to 1.0.

Claims (12)

1. A battery comprising:

an electrolytic solution;

a positive electrode; and

a negative electrode, wherein

the negative electrode has a negative electrode active material layer containing a carbon material and having a thickness per one face of 70 μm or more and not more than 120 μm,

the electrolytic solution contains a solvent containing 15% by mass or more and not more than 30% by mass of a cyclic carbonate represented by the following formula (1):

wherein R 1 to R 4 each independently represents hydrogen, a halogen, an alkyl group or a halogenated alkyl group, and

a mass content ratio (B/A) of a halogenated cyclic carbonate (B % by mass) contained in the cyclic carbonate (A % by mass) which is represented by the formula (1) is from 0.5 to 1.0; and

wherein the halogenated cyclic carbonate is monofluoroethylene carbonate.

2. The battery according to claim 1 , wherein the carbon material includes graphite having a lattice spacing d 002 in the C-axis direction in X-ray diffraction of 0.335 nm or more and less than 0.338 nm.

3. The battery according to claim 1 , wherein the cyclic carbonate represented by the formula (1) include propylene carbonate.

4. The battery according to claim 1 , wherein the cyclic carbonate represented by the formula (1) include ethylene carbonate.

Assignments (3)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 22, 2018
From: TOHOKU MURATA MANUFACTURING CO., LTD
To: MURATA MANUFACTURING CO., LTD.
Reel/Frame 045103/0835 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 22, 2018
From: SONY CORPORATION
To: TOHOKU MURATA MANUFACTURING CO.,LTD
Reel/Frame 045104/0001 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Feb 3, 2010
From: WAKITA, SHINYA; OKAE, IZAYA
To: SONY CORPORATION
Reel/Frame 023893/0725 →