Secondary battery-use active material, secondary battery-use electrode, secondary battery, battery pack, electric vehicle, electric power storage system, electric power tool, and electronic apparatus
US9899670B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 9, 2014 |
| Grant date | Feb 20, 2018 |
| Priority date | — |
| Expiry date | Oct 7, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/70
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A secondary battery includes: a cathode; an anode; and an electrolytic solution. The cathode contains an active material capable of inserting and extracting an electrode reactant. A ratio IS/IF of a peak intensity IS derived from SO2− and a peak intensity IF derived from LiF2− is 0.04 or more, the peak intensity IS and the peak intensity IF being obtained by negative ion analysis on the active material with use of time-of-flight secondary ion mass spectrometry. Since a secondary battery according to the present invention has an intensity ratio IS/IF of 0.04 or more as obtained by a negative ion analysis of the active material using time-of-flight secondary ion mass spectrometry, the secondary battery is able to achieve excellent battery characteristics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.