US 12,237,509 B2
Secondary battery
Kenji Matsubara, Osaka Fu (JP); Hiroshi Kawada, Hyogo Ken (JP); Atsushi Fukui, Hyogo Ken (JP); and Masanobu Takeuchi, Osaka Fu (JP)
Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
Appl. No. 17/619,707
Filed by Panasonic Intellectual Property Management Co., Ltd., Osaka (JP)
PCT Filed Jun. 16, 2020, PCT No. PCT/JP2020/023542
§ 371(c)(1), (2) Date Dec. 16, 2021,
PCT Pub. No. WO2020/262102, PCT Pub. Date Dec. 30, 2020.
Claims priority of application No. 2019-122322 (JP), filed on Jun. 28, 2019.
Prior Publication US 2022/0359871 A1, Nov. 10, 2022
Int. Cl. H01M 4/583 (2010.01); H01M 4/02 (2006.01); H01M 10/0525 (2010.01); H01M 10/0562 (2010.01)
CPC H01M 4/583 (2013.01) [H01M 10/0525 (2013.01); H01M 10/0562 (2013.01); H01M 2004/027 (2013.01)] 17 Claims
 
1. A secondary battery, comprising:
a positive electrode; a negative electrode; and an electrolytic solution, wherein
the negative electrode includes a carbon material electrochemically capable of absorbing and releasing lithium ions, and a solid electrolyte covering at least part of a surface of the carbon material and having lithium ion conductivity,
the solid electrolyte includes
a first compound represented by a general formula: LixM1Oy,
where 0.5<x≤9, 1≤y<6, and the M1 includes at least one element selected from the group consisting of B, Al, Si, P, Ti, V, Zr, Nb, Ta, and La, and
a second compound containing a fluorine atom and an M2 atom bonded to the fluorine atom, where M2 is at least one selected from the group consisting of Li, Mg, Ca, Sr, Ba, La, Ce, Sm, Ga, Bi, and Al,
the electrolytic solution includes a solvent and a lithium salt, and
the solvent contains at least water.
 
17. A secondary battery, comprising:
a positive electrode; a negative electrode; and an electrolytic solution, wherein
the negative electrode includes a carbon material electrochemically capable of absorbing and releasing lithium ions, and a solid electrolyte covering at least part of a surface of the carbon material and having lithium ion conductivity,
the solid electrolyte includes a first compound represented by a general formula: LixM1Oy,
where 0.5<x≤9, 1≤y<6, and the M1 includes at least one element selected from the group consisting of B, Al, Si, P, Ti, V, Zr, Nb, Ta, and La,
wherein the solid electrolyte has a thickness of 0.5 nm or more and less than 50 nm,
the electrolytic solution includes a solvent and a lithium salt, and
the solvent contains at least water.