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1. WO2020137321 - NEGATIVE ELECTRODE FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERY AND NONAQUEOUS ELECTROLYTE SECONDARY BATTERY

Publication Number WO/2020/137321
Publication Date 02.07.2020
International Application No. PCT/JP2019/046295
International Filing Date 27.11.2019
IPC
H01M 4/133 2010.1
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
133Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
H01M 4/36 2006.1
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
36Selection of substances as active materials, active masses, active liquids
H01M 4/38 2006.1
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
36Selection of substances as active materials, active masses, active liquids
38of elements or alloys
H01M 4/48 2010.1
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
36Selection of substances as active materials, active masses, active liquids
48of inorganic oxides or hydroxides
H01M 4/587 2010.1
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
36Selection of substances as active materials, active masses, active liquids
58of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
583Carbonaceous material, e.g. graphite-intercalation compounds or CFx
587for inserting or intercalating light metals
H01M 4/62 2006.1
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
CPC
H01M 4/133
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
133Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
H01M 4/36
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
36Selection of substances as active materials, active masses, active liquids
H01M 4/38
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
36Selection of substances as active materials, active masses, active liquids
38of elements or alloys
H01M 4/48
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
36Selection of substances as active materials, active masses, active liquids
48of inorganic oxides or hydroxides
H01M 4/587
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
36Selection of substances as active materials, active masses, active liquids
58of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
583Carbonaceous material, e.g. graphite-intercalation compounds or CFx
587for inserting or intercalating light metals
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
Applicants
  • パナソニックIPマネジメント株式会社 PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD. [JP]/[JP]
Inventors
  • 石川 香織 ISHIKAWA Kaori
  • 伊藤 大介 ITO Daisuke
  • 松尾 雄太 MATSUO Yuta
  • 倉本 護 KURAMOTO Mamoru
Agents
  • 鎌田 健司 KAMATA Kenji
  • 野村 幸一 NOMURA Koichi
Priority Data
2018-24814128.12.2018JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) NEGATIVE ELECTRODE FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERY AND NONAQUEOUS ELECTROLYTE SECONDARY BATTERY
(FR) ÉLECTRODE NÉGATIVE D'UNE BATTERIE SECONDAIRE À ÉLECTROLYTE NON AQUEUX ET BATTERIE SECONDAIRE À ÉLECTROLYTE NON AQUEUX
(JA) 非水電解質二次電池用負極および非水電解質二次電池
Abstract
(EN)
A negative electrode (20) which is one embodiment of the present invention comprises: a negative electrode collector (30); and a negative-electrode mixed material layer (31) that is formed atop the negative electrode collector (30). The negative-electrode mixed material layer (31) includes: a first layer (32) which contains a first carbon-based active material, a silicon-based active material, a polyacrylic acid, or a salt thereof, the first layer being formed atop the negative electrode collector (30); and a second layer (33) having a tap density greater than that of the first carbon-based active material and a BET specific surface area smaller than that of the first carbon-based active material, the second layer being formed atop the first layer (32). The mass of the first layer (32) is at least 50 mass% but less than 90 mass% with respect to the mass of the negative-electrode mixed material layer (31), and the mass of the second layer (33) is greater than 10 mass% but no more than 50 mass% with respect to the mass of the negative-electrode mixed material layer (31). By using a negative electrode of this kind as a nonaqueous electrolyte secondary battery, it becomes possible to provide a nonaqueous electrolyte secondary battery having superior input characteristics, cycle characteristics, and high-temperature retention characteristics.
(FR)
Une électrode négative (20) qui est un mode de réalisation de la présente invention comprend : un collecteur d'électrode négative (30) ; et une couche de matériau mixte d'électrode négative (31) qui est formée au-dessus du collecteur d'électrode négative (30). La couche de matériau mixte d'électrode négative (31) comprend : une première couche (32) qui contient un premier matériau actif à base de carbone, un matériau actif à base de silicium, un acide polyacrylique, ou un sel associé, la première couche étant formée au-dessus du collecteur d'électrode négative (30) ; et une seconde couche (33) ayant une masse volumique tassée supérieure à celle du premier matériau actif à base de carbone et une surface spécifique BET inférieure à celle du premier matériau actif à base de carbone, la seconde couche étant formée au-dessus de la première couche (32). La masse de la première couche (32) est d'au moins 50 % en masse mais inférieure à 90 % en masse par rapport à la masse de la couche de matériau mixte d'électrode négative (31), et la masse de la seconde couche (33) est supérieure à 10 % en masse mais pas plus de 50 % en masse par rapport à la masse de la couche de matériau mixte d'électrode négative (31). Au moyen d'une électrode négative de ce type en tant que batterie secondaire à électrolyte non aqueux, il devient possible de fournir une batterie secondaire à électrolyte non aqueux ayant des caractéristiques d'entrée supérieures, des caractéristiques de cycle et des caractéristiques de rétention à température élevée.
(JA)
本開示の一態様である負極(20)は、負極集電体(30)と、負極集電体(30)上に形成された負極合材層(31)とを備え、負極合材層(31)は、第1炭素系活物質、Si系活物質、及びポリアクリル酸またはその塩を含み、負極集電体(30)上に形成された第1層(32)と、タップ密度が第1炭素系活物質より大きく、BET比表面積が前記第1炭素系活物質より小さい第2炭素系活物質を含み、第1層(32)上に形成された第2層(33)と、を有し、第1層(32)の質量は、負極合材層(31)の質量に対して50質量%以上90質量%未満であり、第2層(33)の質量は、負極合材層(31)の質量に対して10質量%超50質量%以下である。このような負極を非水電解質二次電池に用いることで、入力特性、サイクル特性、および高温保存特性に優れた非水電解質二次電池の提供が可能になる。
Also published as
JP2020562960
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