US 12,148,917 B2
Nonaqueous electrolyte secondary battery negative electrode and nonaqueous electrolyte secondary battery
Takahiro Fukuoka, Osaka (JP); Masaki Hasegawa, Osaka (JP); Masahiro Soga, Osaka (JP); Yuto Horiuchi, Osaka (JP); and Takashi Yamamoto, Osaka (JP)
Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
Appl. No. 17/441,961
Filed by Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
PCT Filed Feb. 17, 2020, PCT No. PCT/JP2020/006124
§ 371(c)(1), (2) Date Sep. 22, 2021,
PCT Pub. No. WO2020/195335, PCT Pub. Date Oct. 1, 2020.
Claims priority of application No. 2019-063661 (JP), filed on Mar. 28, 2019.
Prior Publication US 2022/0190320 A1, Jun. 16, 2022
Int. Cl. H01M 4/36 (2006.01); H01M 4/02 (2006.01); H01M 4/134 (2010.01); H01M 4/38 (2006.01); H01M 4/58 (2010.01); H01M 4/62 (2006.01); H01M 10/0525 (2010.01)
CPC H01M 4/364 (2013.01) [H01M 4/134 (2013.01); H01M 4/386 (2013.01); H01M 4/5825 (2013.01); H01M 4/622 (2013.01); H01M 4/625 (2013.01); H01M 10/0525 (2013.01); H01M 2004/027 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A negative electrode for a non-aqueous electrolyte secondary battery, comprising:
a negative electrode material mixture including a negative electrode active material capable of electrochemically absorbing and desorbing lithium ions; a carbon nanotube; and an acrylic resin,
wherein the negative electrode active material includes a composite material including a lithium ion conductive phase, and silicon particles dispersed in the lithium ion conductive phase,
the lithium ion conductive phase includes a silicate phase and/or a carbon phase, and
the silicate phase includes at least one selected from the group consisting of alkali metal elements and Group 2 elements,
wherein the carbon nanotube is disposed outside the composite material, and
wherein a content Mc of the carbon nanotube in the negative electrode material mixture is 0.1 mass % or more and 0.5 mass % or less, relative to a whole of the negative electrode material mixture.