The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 04, 2020
Filed:
Mar. 04, 2015
Murata Manufacturing Co., Ltd., Kyoto, JP;
Toshio Nishi, Saitama, JP;
Masayuki Ihara, Fukushima, JP;
Hideki Nakai, Saitama, JP;
Akinori Kita, Fukushima, JP;
Murata Manufacturing Co., Ltd., Kyoto, JP;
Abstract
A secondary battery includes: a cathode; an anode including a carbon material; and non-aqueous electrolytic solution. A photoelectron spectrum of oxygen 1s is obtained from an analysis of the anode by X-ray photoelectron spectroscopy. A first peak positioned in vicinity of 1360 reciprocal centimeters and a second peak positioned in vicinity of 1580 reciprocal centimeters are obtained from an analysis of the carbon material by Raman spectroscopy. A half band width ΔWof the photoelectron spectrum is about 3 electron volts or more. A half band width ΔWof the second peak is about 19 reciprocal centimeters or more. A ratio I/Iof intensity Iof the first peak to intensity Iof the second peak is from about 0.15 to about 0.3 both inclusive.