KR920003293B1 - Separate membrane of battery - Google Patents

Separate membrane of battery Download PDF

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KR920003293B1
KR920003293B1 KR1019890020456A KR890020456A KR920003293B1 KR 920003293 B1 KR920003293 B1 KR 920003293B1 KR 1019890020456 A KR1019890020456 A KR 1019890020456A KR 890020456 A KR890020456 A KR 890020456A KR 920003293 B1 KR920003293 B1 KR 920003293B1
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South Korea
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battery
sheet
silica
separator
graphite
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KR1019890020456A
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Korean (ko)
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KR910013609A (en
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이동원
박경남
김재경
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동양나이론 주식회사
공정곤
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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Abstract

The porous insulating film for a battery is produced by mixing a high density polyethylene (HDPE), a silica, a plasticizer i.e. dioctylphthalate (DOP) or mineral oil (MO), and a conductive material i.e. carbon black (CB), graphite (GR) or carbon fiber (CB) with a lubricating agent i.e. zinc stearate at 150-230 deg.C for 5 min to obtain a pellet, extracting the pellet at 130-220 deg.C to obtain a sheet, passing the sheet through the roller at room temp., and drying it at 80-100 deg.C. The insulating film has a low electric resistance and an excellent tensile strength.

Description

받데리 격리막Base Separator

본 발명은 전기저항을 감소시킨 폴리올레핀 수지계 받데리 격리막에 관한 것이다.The present invention relates to a polyolefin resin based separator that has reduced electrical resistance.

종래, 받데리 격리막은 폴리올레핀계 수지와 실리카 및 가소제를 믹서로 혼합한 후, 컴파운팅 머신으로 혼련, 시이트 현상으로 압출함으로써 제조하였다(미합중국 특허 제3 351 495호, 동 제4 024 323호).Conventionally, the separator is manufactured by mixing a polyolefin resin, silica and a plasticizer by a mixer, and then kneading and extruding a sheet by a compounding machine (US Pat. No. 3,351,495, 4,024,323). .

그러나 상기의 일반적 받데리 격리막은 인장강도가 낮고, 컴파운딩시 토출상태가 불량한 이외에도 특히 전기저항이 높다는 문제점이 지적되고 있다.However, it is pointed out that the general battery separator has a low tensile strength and particularly high electrical resistance in addition to a poor discharge state during compounding.

전기저항이 높다는 것은 받데리의 기전력이 낮다는 것, 즉, 받데리 효율이 낮다는 것을 의미하므로, 전기저항을 낮추는 것은 이 분야의 주요한 과제이다.High electrical resistance means that the electromotive force of the battery is low, that is, the efficiency of the battery is low. Therefore, lowering the electrical resistance is a major problem in this field.

따라서 본 발명자들은 전기저항을 감소시키겠다는 의도에서 예의 연구한 결과, 전기저항 뽄만 아니라 인장강도 역시 뛰어난 받데리 격리막을 제조하게 되었다.Therefore, the present inventors have made intensive studies with the intention of reducing the electrical resistance, and thus, they have produced a battery separator having excellent tensile strength as well as electrical resistance 뽄.

이하 본원의 내용을 상술한다.Hereinafter, the content of the present application will be described in detail.

본 발명은 폴리올레핀, 실리카, 가소제로 이루어지는 받데리 격리막에 있어서, 카아본 블랙 또는 그래파이트 또는 카아본 파이버를 각각 또는 혼합하여 첨가하는 것을 특징으로 한다.The present invention is characterized in that carbon black, graphite, or carbon fiber are added or mixed, respectively, in a carrier separator made of polyolefin, silica, and plasticizer.

이때, 이들 첨가물은 500~1000Ωcm-1정도의 전기 전도도를 갖는 것이 적절하며, 미량 투입하면 착색제의 역할만 할 뿐 본원 효과 달성은 어렵고, 과량 투입하면 전기저항이 너무 낮아 도리어 전기도체의 역할을 하므로, 폴리올레핀과 실리카를 합한 양에 대하여 0.5 내지 30vol% 범위로 첨가하는 것이 바람직한다.At this time, these additives are appropriate to have an electrical conductivity of about 500 ~ 1000Ωcm -1 , and if a small amount is added, only the role of a colorant is difficult to achieve the effect of the present application, and if excessively added, the electrical resistance is too low to act as an electrical conductor. It is preferable to add in the range of 0.5-30 vol% with respect to the combined amount of polyolefin and silica.

이와 같이 제조된 본원의 받데리 격리막은 종래의 전기저항(200mΩ.㎠)을 현저히 낮추어 100mΩ.㎠이하의 수준을 얻었으며, 인장강도 역시 우수하였다.Thus prepared isolating separator of the present application significantly lowered the conventional electrical resistance (200mΩ.cm 2) to obtain a level below 100mΩ.cm 2, tensile strength was also excellent.

이하 본 발명을 실시예에 의하여 상세히 설명하면 다음과 같다.Hereinafter, the present invention will be described in detail with reference to Examples.

[실시예]EXAMPLE

표에 기재한 조성과 윤활제로 징크스테아레이트를 수퍼믹서에서 5분간 혼합하여 컴파운딩 머쉰에서 혼련, 펠렛상으로 만든다(작업온도 150~230℃).The zinc stearate is mixed in a supermixer for 5 minutes with the composition and lubricants listed in the table, kneaded in a compounding machine and pelletized (working temperature 150-230 ° C).

이 펠렛을 시이트 압출용 다이가 붙은 압출기에 넣어 시이트 상으로 압출하였다(작업온도 130~220℃).The pellet was placed in an extruder with a die for sheet extrusion and extruded onto a sheet (working temperature 130 to 220 ° C).

이때 압출용 다이 아래에서 2축의 구동 로울러를 통과시켜 시이트의 두께를 추출해낸 후(추출온도-상온, 추출시간-10분) 건조시켜(건조온도 80~100℃) 다공성의 받데리 격리막을 제조하였다.At this time, the thickness of the sheet was extracted by passing a biaxial drive roller under the die for extrusion (extraction temperature-room temperature, extraction time-10 minutes) and dried (drying temperature 80 ~ 100 ℃) to prepare a porous separator membrane. .

이와 같이 제조한 받데리 격리막의 물성은 전기저항 및 인장강도의 두 가지를 측정하였는데(표 참조), 그 측정 방법은 다음과 같다.The physical properties of the thus prepared membrane separator were measured two kinds of electrical resistance and tensile strength (see table), the measuring method is as follows.

* 전기저항; KS C 2202(PALICO MODEL 9100-2)Electrical resistance; KS C 2202 (PALICO MODEL 9100-2)

* 인장강도 : ASTM D-638(STROGRAPH-R)* Tensile Strength: ASTM D-638 (STROGRAPH-R)

[표 1]TABLE 1

Figure kpo00001
Figure kpo00001

* HDPE; 고밀도 폴리에틸렌(호남석유화학 HIVOREX 7000F)* HDPE; High Density Polyethylene (Honam Petrochemical HIVOREX 7000F)

실리카; (일본 실리카 공업 Nipsil E 220A)Silica; (Japan Silica Industry Nipsil E 220A)

DOP; 다이옥틸프탈레이트DOP; Dioctylphthalate

MO; 미네랄 오일(쉘사 Shellflex 412)MO; Mineral Oil (Shellflex 412)

CB; 카아본 블랙(Degussa 사 Printex XE 2)CB; Carbon black (Degussa Printex XE 2)

CF; 카아본 파이퍼(Stackpole Fibers Co. Pantex 1/4 CF-30)CF; Carbon Pfeiffer (Stackpole Fibers Co. Pantex 1/4 CF-30)

GR; 그래파이트(일본 흑연상사 CPB)GR; Graphite (Japanese graphite firm CPB)

Claims (2)

고밀도 폴리에틸렌, 실리카, 및 가소제로 이루어지는 받데리 격리막에 있어서, 카아본 블랙, 그래파이트, 카아본 파이버 중에서 1종 이상을 추가로 선택 함유시키는 것을 특징으로 하는 받데리 격리막.A support separator comprising a high density polyethylene, silica and a plasticizer, wherein the support separator further comprises one or more of carbon black, graphite, and carbon fiber. 제1항에 있어서, 카아본 블랙, 그래파이트, 카아본 파이버 중에서 선택된 물질은 고밀도 폴리에틸렌과 실리카를 합한 양에 대하여 0.5 내지 30vol% 함유시키는 것을 특징으로 하는 받데리 격리막.The method of claim 1, wherein the material selected from among the carbon black, graphite, carbon fiber, the separator membrane, characterized in that containing 0.5 to 30 vol% based on the combined amount of high density polyethylene and silica.
KR1019890020456A 1989-12-30 1989-12-30 Separate membrane of battery KR920003293B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998001911A1 (en) * 1996-07-09 1998-01-15 Accumulatorenwerke Hoppecke Carl Zoellner & Sohn Gmbh & Co. Kg Method of treating resilient materials provided with silicic acid intercalations

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998001911A1 (en) * 1996-07-09 1998-01-15 Accumulatorenwerke Hoppecke Carl Zoellner & Sohn Gmbh & Co. Kg Method of treating resilient materials provided with silicic acid intercalations

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