	US 12,080,890 B2
	Carbonaceous material for negative electrode active material for non-aqueous electrolyte secondary batteries, non-aqueous electrolyte secondary battery negative electrode, non-aqueous electrolyte secondary battery, and production method of carbonaceous material
Takafumi Izawa, Kurashiki (JP); Kengo Tachikawa, Kurashiki (JP); and Hideharu Iwasaki, Kurashiki (JP)
Assigned to KURARAY CO., LTD., Kurashiki (JP)
Filed by KURARAY CO., LTD., Kurashiki (JP)
Filed on Dec. 8, 2022, as Appl. No. 18/063,092.
Application 18/063,092 is a continuation of application No. 16/628,189, granted, now 11,637,286, previously published as PCT/JP2018/025388, filed on Jul. 4, 2018.
Claims priority of application No. 2017-133034 (JP), filed on Jul. 6, 2017.
Prior Publication US 2023/0105396 A1, Apr. 6, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H01M 4/587 (2010.01); C01B 32/05 (2017.01); H01B 1/04 (2006.01); H01M 4/02 (2006.01); H01M 10/052 (2010.01)

CPC H01M 4/587 (2013.01) [C01B 32/05 (2017.08); H01B 1/04 (2013.01); H01M 10/052 (2013.01); C01P 2002/78 (2013.01); C01P 2002/82 (2013.01); C01P 2006/12 (2013.01); C01P 2006/14 (2013.01); C01P 2006/40 (2013.01); C01P 2006/80 (2013.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01)]

8 Claims

1. A negative electrode active material for a non-aqueous electrolyte secondary battery, comprising:

a carbonaceous material having a nitrogen content of 3.5 mass % or more as measured by elemental analysis,

wherein

a ratio of the nitrogen content and a hydrogen content (R_N/H) is 6 or more and 100 or less,

a ratio of an oxygen content and the nitrogen content (R_O/N) is 0.1 or more and 1.0 or less, and

a carbon interplanar spacing (d₀₀₂) of the carbonaceous material observed by X-ray diffraction measurement is 3.70 Å or more.