JP2012134024A5 - - Google Patents
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- JP2012134024A5 JP2012134024A5 JP2010285426A JP2010285426A JP2012134024A5 JP 2012134024 A5 JP2012134024 A5 JP 2012134024A5 JP 2010285426 A JP2010285426 A JP 2010285426A JP 2010285426 A JP2010285426 A JP 2010285426A JP 2012134024 A5 JP2012134024 A5 JP 2012134024A5
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- separator
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- decomposition
- heat resistance
- based inorganic
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一方、不織布、織布等をそのままセパレータとして使用するのではなく、基材として使用し、各種材料を該基材に複合化させて、耐熱性やシャットダウン機能等を付与したセパレータが開示されている。例えば、基材に多孔質フィルムと貼り合わせて複合化したセパレータ、基材にフィラー粒子、樹脂、ゲル状電解質、固体電解質等を含浸・表面塗工することで複合化したセパレータが報告されている(例えば、特許文献8〜12参照)。特に、アルミナ等のアルミニウム系無機化合物のフィラーを基材の表面に塗工して多孔質層を設けることによって耐熱性を持たせた複合化セパレータが広く検討されている。しかしながら、アルミナ系の無機化合物では、電解液の分解による劣化を誘発することが指摘されている(例えば、非特許文献1〜2参照)。このように、耐熱性、電池特性、電解液の分解の抑制を十分に兼ね備えたものはなかった。 On the other hand, a non-woven fabric, a woven fabric or the like is not used as a separator as it is, but is used as a base material, and various materials are combined with the base material to provide heat resistance and a shutdown function. . For example, a separator that has been combined with a porous film on a base material, and a separator that has been composited by impregnating and surface coating filler particles, resin, gel electrolyte, solid electrolyte, etc. on the base material have been reported. (For example, refer to Patent Documents 8 to 12). In particular, composite separators having heat resistance by applying a porous layer by applying a filler of an aluminum-based inorganic compound such as alumina to the surface of a substrate have been widely studied. However, it has been pointed out that an alumina-based inorganic compound induces deterioration due to decomposition of the electrolytic solution (see, for example, Non-Patent Documents 1 and 2). Thus, heat resistance, battery characteristics, none of which adequately combine inhibition of decomposition of the electrolytic solution.
本発明の課題は、耐熱性が高く、電池特性に優れ、且つ電解液の分解による電池の劣化を抑制した、リチウム二次電池用セパレータを提供することにある。 The subject of this invention is providing the separator for lithium secondary batteries which has high heat resistance, is excellent in a battery characteristic, and suppressed deterioration of the battery by decomposition | disassembly of electrolyte solution .
本発明により、耐熱性が高く、電池特性に優れ、且つ電解液の分解による電池の劣化を抑制した、リチウム二次電池用セパレータを提供することができる。 According to the present invention, it is possible to provide a separator for a lithium secondary battery that has high heat resistance, excellent battery characteristics, and suppresses deterioration of the battery due to decomposition of the electrolytic solution .
本発明者らは、電解液の分解による電池の劣化を抑制したリチウム二次電池用セパレータを提供するために、多孔質層に水酸化マグネシウム及び酸化マグネシウムを含有させた場合に好適な多孔質基材について鋭意検討を行った。その結果、ポリエステル系繊維を含有する不織布を用いることにより、内部抵抗値が低く且つ放電容量維持率も高い、電池特性に優れたリチウム二次電池用セパレータを提供できることを見出した。ポリエステル系繊維を含有する不織布がマグネシウム系無機化合物に好適な理由は定かではないが、より広く検討されているアルミニウムのイオンは三価のイオンであるのに対し、マグネシウムのイオンは二価であることから、極性のあるカルボニル基を有するポリエステル系繊維との相互作用が、アルミニウム系無機化合物とマグネシウム系無機化合部とでは異なっていることが推測される。
In order to provide a separator for a lithium secondary battery in which deterioration of the battery due to decomposition of the electrolytic solution is suppressed, the present inventors have provided a porous group suitable when magnesium hydroxide and magnesium oxide are contained in the porous layer. The material was intensively studied. As a result, it has been found that by using a nonwoven fabric containing polyester fibers, a separator for a lithium secondary battery having a low internal resistance value and a high discharge capacity retention rate and excellent battery characteristics can be provided. The reason why non-woven fabrics containing polyester fibers are suitable for magnesium-based inorganic compounds is not clear, but more widely studied aluminum ions are trivalent ions, while magnesium ions are divalent. From this, it is presumed that the interaction with the polyester-based fiber having a polar carbonyl group is different between the aluminum-based inorganic compound and the magnesium-based inorganic compound part.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2010285426A JP5552040B2 (en) | 2010-12-22 | 2010-12-22 | Separator for lithium secondary battery |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2010285426A JP5552040B2 (en) | 2010-12-22 | 2010-12-22 | Separator for lithium secondary battery |
Publications (3)
Publication Number | Publication Date |
---|---|
JP2012134024A JP2012134024A (en) | 2012-07-12 |
JP2012134024A5 true JP2012134024A5 (en) | 2013-09-19 |
JP5552040B2 JP5552040B2 (en) | 2014-07-16 |
Family
ID=46649390
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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JP2010285426A Active JP5552040B2 (en) | 2010-12-22 | 2010-12-22 | Separator for lithium secondary battery |
Country Status (1)
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JP (1) | JP5552040B2 (en) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6013815B2 (en) * | 2012-07-13 | 2016-10-25 | 三菱製紙株式会社 | Lithium ion battery separator |
WO2014049949A1 (en) * | 2012-09-27 | 2014-04-03 | 三洋電機株式会社 | Separator-integrated electrode and nonaqueous electrolyte secondary battery |
JP6061735B2 (en) * | 2013-03-05 | 2017-01-18 | 三菱製紙株式会社 | Battery separator and battery separator manufacturing method |
JP6294803B2 (en) * | 2013-11-20 | 2018-03-14 | 三菱製紙株式会社 | Lithium ion battery separator |
JP6033933B2 (en) * | 2014-09-17 | 2016-11-30 | 三菱製紙株式会社 | Electrochemical element separator and electrochemical element using the same |
WO2016043142A1 (en) * | 2014-09-17 | 2016-03-24 | 三菱製紙株式会社 | Electrochemical element separator and electrochemical element obtained using same |
KR20160102331A (en) | 2014-10-10 | 2016-08-30 | 스미또모 가가꾸 가부시키가이샤 | Laminate, non-aqueous electrolyte secondary battery separator including the laminate, and non-aqueous electrolyte secondary battery including the laminate |
US9923181B2 (en) | 2014-10-10 | 2018-03-20 | Sumitomo Chemical Company, Limited | Laminate, non-aqueous electrolyte secondary battery separator including the laminate, and non-aqueous electrolyte secondary battery including the laminate |
JPWO2016143801A1 (en) * | 2015-03-09 | 2017-12-21 | ニッポン高度紙工業株式会社 | Separator and non-aqueous battery |
EP3512000A4 (en) | 2016-09-08 | 2020-04-29 | Mitsubishi Paper Mills Limited | Substrate for lithium ion battery separators, and lithium ion battery separator |
JP6841706B2 (en) * | 2017-03-30 | 2021-03-10 | 三菱製紙株式会社 | Lithium ion battery separator |
CN115663397A (en) | 2018-01-25 | 2023-01-31 | 三菱制纸株式会社 | Coating liquid for lithium ion battery separator and lithium ion battery separator |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5113685B2 (en) * | 2008-09-09 | 2013-01-09 | 三菱製紙株式会社 | Electrochemical element separator |
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