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1. WO2020070932 - LITHIUM-ION SECONDARY BATTERY AND METHOD FOR MANUFACTURING LITHIUM-ION SECONDARY BATTERY

Publication Number WO/2020/070932
Publication Date 09.04.2020
International Application No. PCT/JP2019/026267
International Filing Date 02.07.2019
IPC
H01M 10/0562 2010.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
10Secondary cells; Manufacture thereof
05Accumulators with non-aqueous electrolyte
056characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
0561the electrolyte being constituted of inorganic materials only
0562Solid materials
H01M 4/13 2010.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
4Electrodes
02Electrodes composed of, or comprising, active material
13Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
H01M 4/62 2006.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
4Electrodes
02Electrodes composed of, or comprising, active material
62Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
H01M 4/66 2006.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
4Electrodes
02Electrodes composed of, or comprising, active material
64Carriers or collectors
66Selection of materials
H01M 4/70 2006.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
4Electrodes
02Electrodes composed of, or comprising, active material
64Carriers or collectors
70characterised by shape or form
H01M 10/052 2010.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
10Secondary cells; Manufacture thereof
05Accumulators with non-aqueous electrolyte
052Li-accumulators
CPC
H01M 10/052
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
10Secondary cells; Manufacture thereof
05Accumulators with non-aqueous electrolyte
052Li-accumulators
H01M 10/0562
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
10Secondary cells; Manufacture thereof
05Accumulators with non-aqueous electrolyte
056characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
0561the electrolyte being constituted of inorganic materials only
0562Solid materials
H01M 10/058
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
10Secondary cells; Manufacture thereof
05Accumulators with non-aqueous electrolyte
058Construction or manufacture
H01M 4/13
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
4Electrodes
02Electrodes composed of or comprising active material
13Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
H01M 4/62
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
4Electrodes
02Electrodes composed of or comprising active material
62Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
H01M 4/66
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
4Electrodes
02Electrodes composed of or comprising active material
64Carriers or collectors
66Selection of materials
Applicants
  • 昭和電工株式会社 SHOWA DENKO K.K. [JP]/[JP]
Inventors
  • 安田 剛規 YASUDA, Takaki
  • 坂脇 彰 SAKAWAKI, Akira
  • 渡邉 恭成 WATANABE, Yasumasa
Agents
  • 古部 次郎 FURUBE, Jiro
  • 加藤 謹矢 KATO, Kinya
Priority Data
2018-18863503.10.2018JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) LITHIUM-ION SECONDARY BATTERY AND METHOD FOR MANUFACTURING LITHIUM-ION SECONDARY BATTERY
(FR) BATTERIE SECONDAIRE AU LITHIUM-ION ET SON PROCÉDÉ DE FABRICATION
(JA) リチウムイオン二次電池、リチウムイオン二次電池の製造方法
Abstract
(EN)
A lithium-ion secondary battery (1) consists of layers in the following order: a substrate (10) that serves as a positive electrode current collector layer; an underlayer (20); a positive electrode layer (30) containing a positive electrode active material; a solid electrolyte layer (40) containing an inorganic solid electrolyte; a retaining layer 50 composed of a noble metal or the like; a diffusion prevention layer (60) composed of an amorphous alloy; and a negative electrode current collector layer (70) composed of a noble metal. A surface (10a) of the substrate (10) for laminating the underlayer (20) through to the negative electrode current collector layer (70) has a maximum-minimum height difference, which is the height difference between the maximum height and the minimum height obtained by measuring unevenness in a range of 20 μm × 20 μm by Atomic Force Microscope (AFM), that is established at 78 nm or less. Thus, in a thin-film laminated lithium-ion secondary battery equipped with an inorganic solid electrolyte, a reduction in the capacity retention rate is suppressed.
(FR)
L'invention concerne une batterie secondaire au lithium-ion (1) qui est constituée de couches dans l'ordre suivant : un substrat (10) qui sert de couche collectrice de courant d'électrode positive; une sous-couche (20); une couche d'électrode positive (30) contenant un matériau actif d'électrode positive; une couche d'électrolyte solide (40) contenant un électrolyte solide inorganique; une couche de retenue 50 composée d'un métal noble ou similaire; une couche de prévention de diffusion (60) composée d'un alliage amorphe; et une couche collectrice de courant d'électrode négative (70) composée d'un métal noble. Une surface (10a) du substrat (10) pour stratifier la sous-couche (20) à travers la couche collectrice de courant d'électrode négative (70) a une différence de hauteur maximale-minimale, qui est la différence de hauteur entre la hauteur maximale et la hauteur minimale obtenue par mesure d'une irrégularité dans une plage de 20 µm × 20 µm par microscope à force atomique (AFM), qui est établie à 78 nm ou moins. Ainsi, dans une batterie secondaire au lithium-ion stratifiée à film mince équipée d'un électrolyte solide inorganique, une réduction du taux de rétention de capacité est supprimée.
(JA)
リチウムイオン二次電池(1)は、正極集電体層を兼ねる基板(10)と、下地層(20)と、正極活物質を含む正極層(30)と、無機固体電解質を含む固体電解質層(40)と、貴金属等で構成された保持層(50)と、非晶質合金で構成された拡散防止層(60)と、貴金属で構成された負極集電体層(70)とを、この順に積層して構成される。そして、基板(10)のうち下地層(20)乃至負極集電体層(70)を積層する表面(10a)は、AFM(Atomic Force Microscope)にて20μm×20μmの範囲の凹凸を測定して得られた最大高さと最小高さとの高低差である最大最小高低差が、78nm以下に設定される。これらにより、無機固体電解質を備えた薄膜積層型のリチウムイオン二次電池において、容量維持率の低下を抑制する。
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