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1. WO2017018483 - BATTERY SEPARATOR AND PRODUCTION METHOD THEREFOR

Publication Number WO/2017/018483
Publication Date 02.02.2017
International Application No. PCT/JP2016/072162
International Filing Date 28.07.2016
IPC
H01M 2/16 2006.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
2Constructional details, or processes of manufacture, of the non-active parts
14Separators; Membranes; Diaphragms; Spacing elements
16characterised by the material
CPC
B29C 55/12
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
55Shaping by stretching, e.g. drawing through a die; Apparatus therefor
02of plates or sheets
10multiaxial
12biaxial
B29C 71/02
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
71After-treatment of articles without altering their shape; Apparatus therefor
02Thermal after-treatment
B29L 2031/755
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
LINDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
2031Other particular articles
755Membranes, diaphragms
H01M 50/403
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
50Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
40Separators; Membranes; Diaphragms; Spacing elements inside cells
403Manufacturing processes of separators, membranes or diaphragms
H01M 50/409
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
50Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
40Separators; Membranes; Diaphragms; Spacing elements inside cells
409Separators, membranes or diaphragms characterised by the material
H01M 50/446
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
50Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
40Separators; Membranes; Diaphragms; Spacing elements inside cells
409Separators, membranes or diaphragms characterised by the material
446Composite material consisting of a mixture of organic and inorganic materials
Applicants
  • 東レ株式会社 TORAY INDUSTRIES, INC. [JP]/[JP]
Inventors
  • 水野 直樹 MIZUNO, Naoki
  • 菅田 まさみ SUGATA, Masami
Priority Data
2015-15014529.07.2015JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) BATTERY SEPARATOR AND PRODUCTION METHOD THEREFOR
(FR) SÉPARATEUR DE BATTERIE ET SON PROCÉDÉ DE FABRICATION
(JA) 電池用セパレータおよびその製造方法
Abstract
(EN)
Provided is a battery separator comprising a heat-resistant porous layer and a polyolefin microporous film, having high winding density when formed into a wound body, and being suitable for a lithium ion secondary battery having high volumetric energy density. The battery separator is characterized by: an aqueous resin or a water-dispersible resin and a porous layer including plate-shaped inorganic particles being laminated upon at least one surface of a polyolefin microporous film having a width of at least 100 mm and an F25-value variation width of no more than 1 MPa in the width direction; and the plate-shaped inorganic particles being substantially parallel throughout the entire thickness direction of the porous layer. (The F25 value indicates a value calculated by dividing a load value for when a sample piece is stretched by 25%, measured using a tensile testing machine, by the cross-sectional area of the test piece.)
(FR)
L'invention concerne un séparateur de batterie comprenant une couche poreuse résistant à la chaleur et un film microporeux de polyoléfine, ayant une haute densité d'enroulement lorsqu'il est transformé en un corps enroulé, et est approprié à une batterie secondaire au lithium-ion ayant une haute densité volumétrique d'énergie. Le séparateur de batterie est caractérisé par : une résine aqueuse ou une résine hydrodispersable et une couche poreuse comprenant des particules inorganiques en forme de plaque qui sont stratifiées sur au moins une surface d'un film microporeux de polyoléfine ayant une largeur d'au moins 100 mm et une largeur de variation de valeur F25 n'excédant pas 1 MPa dans le sens de la largeur; et les particules inorganiques en forme de plaque sont sensiblement parallèles sur toute l'épaisseur de la couche poreuse. (La valeur F25 indique une valeur calculée en divisant une valeur de charge dans le cas où une pièce d'échantillon est étirée de 25 %, mesurée à l'aide d'une machine d'essai à la traction, dans la section transversale de la pièce de test.)
(JA)
本発明は、耐熱性を有する多孔層とポリオレフィン微多孔膜からなる電池用セパレータであり、捲回体としたときの捲回密度が高く、体積エネルギー密度の高いリチウムイオン二次電池に適した電池用セパレータを提供する。 幅方向におけるF25値の変動幅が1MPa以下である幅100mm以上のポリオレフィン微多孔膜の少なくとも片面に、水溶性樹脂または水分散性樹脂と、板状無機粒子を含む多孔層が積層され、前記板状無機粒子が前記多孔層の厚み方向全体において略平行であることを特徴とする電池用セパレータ。(ここで、F25値とは引張試験機を用いて試験片が25%伸びた時の荷重値を試験片の断面積で除した値を表す。)
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