Cell, cell pack, electronic device, electric vehicle, electricity storage apparatus, and power system

Patent metadata

Field	Value
Publication number	US-2016336614-A1
Application number	US-201515109918-A
Country	US
Kind code	A1
Filing date	Jan 20, 2015
Priority date	Jan 20, 2014
Publication date	Nov 17, 2016
Grant date	—

Abstract

Between an anode active material layer and a separator, a recess impregnation region of an anode side in which electrolytes and solid particles are disposed and including a recess that is located between adjacent anode active material particles positioned on the outermost surface of the anode active material layer is formed. Between a cathode active material layer and a separator, a recess impregnation region of a cathode side in which electrolytes and solid particles are disposed and including a recess that is located between adjacent cathode active material particles positioned on the outermost surface of the cathode active material layer is formed. The solid particles in the recess impregnation regions of the cathode side and the anode side have a concentration that is 30 volume % or more.

First claim

1 - 20 . (canceled)

21 : A non-aqueous electrolyte secondary battery comprising:
a cathode including a cathode active material layer comprising cathode active material particles; an anode including an anode active material layer comprising anode active material particles; a separator that is located between the cathode active material layer and the anode active material layer; electrolytes comprising an electrolyte solution; and solid particles, wherein at least one of a recess impregnation region of an anode side and a recess impregnation region of a cathode side, and at least one of a deep region of the anode side and a deep region of the cathode side are included, wherein the recess impregnation region of the anode side refers to a region in which the electrolytes and the solid particles are disposed and that includes a recess that is located between adjacent anode active material particles positioned on the outermost surface of the anode active material layer, wherein the deep region of the anode side refers to a region in which the electrolytes or the electrolytes and the solid particles are disposed and that is inside the anode active material layer, which is deeper than the recess impregnation region of the anode side, wherein the recess impregnation region of the cathode side refers to a region in which the electrolytes and the solid particles are disposed and that includes a recess that is located between adjacent cathode active material particles positioned on the outermost surface of the cathode active material layer, wherein the deep region of the cathode side refers to a region in which the electrolytes or the electrolytes and the solid particles are disposed and that is inside the cathode active material layer, which is deeper than the recess impregnation region of the cathode side, and wherein the solid particles in the at least one of the recess impregnation regions have a concentration that is 30 volume % or more.

22 : The non-aqueous electrolyte secondary battery according to claim 21 ,
wherein the electrolyte solution comprises a non-aqueous solvent, and wherein a cyclic alkylene carbonate has a content that is 30 mass % or more with respect to the non-aqueous solvent.

23 : The non-aqueous electrolyte secondary battery according to claim 21 ,
wherein the solid particles of the at least one of the deep regions have a concentration that is 3 volume % or less.

24 : The non-aqueous electrolyte secondary battery according to claim 21 ,
wherein the solid particles of the at least one of the recess impregnation regions have a concentration that is 10 times a concentration of solid particles of the deep region that is on the same electrode side as the at least one of the recess impregnation regions or more.

25 : The non-aqueous electrolyte secondary battery according to claim 21 ,
wherein the recess impregnation region of the anode side has a thickness that is 10% or more and 40% or less of a thickness of the anode active material layer.

26 : The non-aqueous electrolyte secondary battery according to claim 21 ,
wherein the solid particles comprised in the at least one of the recess impregnation regions have a particle size D95 that is 2/√3−1 times a particle size D50 of active materials or more.

27 : The non-aqueous electrolyte secondary battery according to claim 21 ,
wherein the solid particles comprised in the at least one of the recess impregnation regions have a particle size D50 that is 2/√3−1 times a particle size D50 of active material particles or less.

28 : The non-aqueous electrolyte secondary battery according to claim 21 ,
wherein the solid particles have a BET specific surface area that is 1 m 2 /g or more and 60 m 2 /g or less.

29 : The non-aqueous electrolyte secondary battery according to claim 21 ,
wherein a volume percentage of the solid particles with respect to the electrolytes is 1 volume % or more and 50 volume % or less.

30 : The non-aqueous electrolyte secondary battery according to claim 21 ,
wherein the solid particles are at least one of inorganic particles and organic particles.

31 : A non-aqueous electrolyte secondary battery comprising:
a cathode including a cathode active material layer comprising cathode active material particles; an anode including an anode active material layer comprising anode active material particles; a separator that is located between the cathode active material layer and the anode active material layer; electrolytes comprising an electrolyte solution; and solid particles, wherein a recess impregnation region of an anode side and a deep region of the anode side are included,
or
the recess impregnation region of the anode side and the deep region of the anode side and a recess impregnation region of a cathode side and a deep region of the cathode side are included,
wherein the recess impregnation region of the anode side refers to a region in which the electrolytes and the solid particles are disposed and that includes a recess that is located between adjacent anode active material particles positioned on the outermost surface of the anode active material layer,
wherein the deep region of the anode side refers to a region in which the electrolytes or the electrolytes and the solid particles are disposed and that is inside the anode active material layer, which is deeper than the recess impregnation region of the anode side,
wherein the recess impregnation region of the cathode side refers to a region in which the electrolytes and the solid particles are disposed and that includes a recess that is located between adjacent cathode active material particles positioned on the outermost surface of the cathode active material layer,
wherein the deep region of the cathode side refers to a region in which the electrolytes or the electrolytes and the solid particles are disposed and that is inside the cathode active material layer, which is deeper than the recess impregnation region of the cathode side,
wherein the solid particles in the recess impregnation region of the anode side have a concentration that is 30 volume % or more,
wherein the solid particles in the recess impregnation region of the cathode side have a concentration that is 30 volume % or more, and
wherein the electrolyte solution comprises at least one kind of an unsaturated cyclic carbonate ester represented by Formula (1) and halogenated carbonate esters represented by Formula (2) and Formula (3):

where X represents any one divalent group selected from the group consisting of —C(═R1)-C(═R2)-, —C(═R1)-C(═R2)-C(═R3)-, —C(═R1)-C(R4)(R5)-, —C(═R1)-C(R4)(R5)-C(R6)(R7)-, —C(R4)(R5)-C(═R1)-C(R6)(R7)-, —C(═R1)-C(═R2)-C(R4)(R5)-, —C(═R1)-C(R4)(R5)-C(═R2)-, —C(═R1)-O—C(R4)(R5)-, —C(═R1)-O—C(═R2)-, —C(═R1)-C(═R8)-, and —C(═R1)-C(═R2)-C(═R8)-; where R1, R2 and R3 each independently represent a divalent hydrocarbon group having one carbon atom or a divalent halogenated hydrocarbon group having one carbon atom; where R4, R5, R6 and R7 each independently represent a monovalent hydrogen group (—H), a monovalent hydrocarbon group having 1 to 8 carbon atoms, a monovalent halogenated hydrocarbon group having 1 to 8 carbon atoms or a monovalent oxygen-comprising hydrocarbon group having 1 to 6 carbon atoms; and where R8 represents an alkylene group having 2 to 5 carbon atoms or a halogenated alkylene group having 2 to 5 carbon atoms;

where R21 to R24 each independently represent a hydroge

Assignees

• Sony Corp

Inventors

• Hatta Kazuhito
• Shimosaka Nobuaki
• Machida Masaki
• Aoki Manabu
• Miyamoto Masahiro

Classifications

• B60L7/10 Primary

  Dynamic electric regenerative braking (B60L7/22 takes precedence) · CPC title

• B60K6/46

  Series type · CPC title

• B60L2240/549

  Current · CPC title

• B60L2240/547

  Voltage · CPC title

• H01M10/0568

  characterised by the solutes · CPC title