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:
Sep. 14, 2021
Filed:
Mar. 21, 2019
Basf Toda Battery Materials Llc, Yamaguchi, JP;
Gs Yuasa International Ltd., Kyoto, JP;
Taisei Inoue, Sanyoonoda, JP;
Daisuke Nishikawa, Sanyoonoda, JP;
Manabu Yamamoto, Sanyoonoda, JP;
Katsuya Inoue, Kyoto, JP;
BASF TODA BATTERY MATERIALS LLC, Yamaguchi, JP;
GS YUASA INTERNATIONAL LTD., Kyoto, JP;
Abstract
When a non-aqueous electrolyte secondary battery in which a positive electrode active material comprising a layered lithium-composite oxide is used for a positive electrode is subjected to charge/discharge under a prescribed condition, in a graph showing the relationship between voltage 'V' with discharge during 5cycle and value dQ/dV from differentiation of battery capacity 'Q' with discharge during 5cycle by voltage “V”, peak intensity ratio “r” represented by the equation: r=|Ic|/(|Ia|+|Ib|+|Ic|) satisfies 0<r≤0.25, in which |Ia| is absolute value dQ/dV for a peak top within a range of more than 3.9V to 4.4V or less, |Ib| is absolute value dQ/dV for a peak top within a range of more than 3.5V to 3.9V or less, and |Ic| is absolute value dQ/dV for a peak top within a range of 2.0V or more to 3.5V or less.