JP7160910B2 - 分離膜及びそれを含むリチウム-硫黄電池 - Google Patents
分離膜及びそれを含むリチウム-硫黄電池 Download PDFInfo
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Description
多孔性基材と、前記多孔性基材の少なくとも一面に形成されたコーティング層とを含み、
前記コーティング層は、酸素含有官能基を含む炭素ナノチューブとリチウムイオン伝導性高分子とを含むことを特徴とするリチウム-硫黄電池用分離膜を提供する。
図1は、リチウム-硫黄電池(10)を示す断面図であり、負極(1)としてリチウム金属を、正極(3)として硫黄を含み、これらの間に分離膜(5)が配置された構造を有する。このとき、電解質(図示せず)は、前記負極(1)と正極(3)との間で分離膜(5)に含浸された形態で存在する。
正極は、正極集電体上に正極活物質が積層された形態を有する。
実施例1
(1)分離膜の製造
多孔性基材として、厚さ20μmのポリエチレン(気孔度50%)フィルムを準備した。
電気伝導性を有している導電性炭素と硫黄を導電性炭素:硫黄の重量比(wt%)30:70(21g:49g)でボールミル工程により混合し、硫黄-炭素複合体を得た。正極活物質スラリー全体の重量に対し、前記複合体を含む正極活物質70.0g、導電材としてSuper-P 20.0g、バインダーとしてポリビニリデンフルオライド10.0g及び溶媒としてN-メチル-2-ピロリドン500gの組成で正極活物質スラリーを製造した後、アルミニウム集電体上にコーティングして正極活性部を製造した。
ヒドロキシ基(-OH)が導入された炭素ナノチューブを用いたことを除いては、前記実施例1と同様に行って、リチウム-硫黄電池を製造した。
炭素ナノチューブ及びリチウムイオン伝導性高分子がコーティングされないポリエチレンを分離膜として用いたことを除いては、前記実施例1と同様に行って、リチウム-硫黄電池を製造した。
酸素含有官能基が導入されない炭素ナノチューブを用いたことを除いては、前記実施例1と同様に行って、リチウム-硫黄電池を製造した。
前記実施例及び比較例で製造されたリチウム-硫黄電池を0.3C/0.5C充電/放電にて条件下で駆動し、初期充放電容量を測定し、リチウム-硫黄電池の容量変化を確認した。
3:正極 5:分離膜
Claims (13)
- 多孔性基材と、前記多孔性基材の少なくとも一面に形成されたコーティング層とを含み、
前記コーティング層は、酸素含有官能基を含む炭素ナノチューブとリチウムイオン伝導性高分子とを含み、
前記リチウムイオン伝導性高分子は、リチウム置換されたスルホン化テトラフルオロエチレン系フッ素重合体(ナフィオン)であり、
前記コーティング層は、酸素含有官能基を含む炭素ナノチューブ及びリチウムイオン伝導性高分子が1:5~1:20の重量比で混合されたことを特徴とするリチウム-硫黄電池用分離膜。 - 前記酸素含有官能基は、カルボキシ基、ヒドロキシ基、エーテル基、エステル基、アルデヒド基、カルボニル基及びアミド基からなる群より選ばれるいずれか1つ以上であることを特徴とする、請求項1に記載のリチウム-硫黄電池用分離膜。
- 前記多孔性基材は厚さが3μm~100μmであり、気孔の大きさが0.01μm~10μmであることを特徴とする、請求項1または2に記載のリチウム-硫黄電池用分離膜。
- 前記多孔性基材は、ポリエチレン、ポリプロピレン、ポリエチレンテレフタレート、ポリブチレンテレフタレート、ポリアミド、ポリアセタール、ポリカーボネート、ポリイミド、ポリエーテルケトン、ポリエーテルスルホン、ポリフェニレンオキサイド、ポリフェニレンスルファイド、ポリエチレンナフタレン、ポリテトラフルオロエチレン、ポリビニリデンフルオライド、ポリ塩化ビニル、ポリアクリロニトリル、セルロース、ナイロン、ポリパラフェニレンベンゾビスオキサゾール、及びポリアリレートからなる群より選ばれる1種以上の材質を含むことを特徴とする、請求項1から3のいずれか一項に記載のリチウム-硫黄電池用分離膜。
- 前記コーティング層は、酸素含有官能基を含む炭素ナノチューブ及びリチウムイオン伝導性高分子が1:10~1:15の重量比で混合されたことを特徴とする、請求項1から4のいずれか一項に記載のリチウム-硫黄電池用分離膜。
- 前記コーティング層は、厚さが100nm~20μmであることを特徴とする、請求項1から5のいずれか一項に記載のリチウム-硫黄電池用分離膜。
- 前記コーティング層は、厚さが200nm~10μmであることを特徴とする、請求項1から6のいずれか一項に記載のリチウム-硫黄電池用分離膜。
- 前記コーティング層は、厚さが0.4μm~5μmであることを特徴とする、請求項1から7のいずれか一項に記載のリチウム-硫黄電池用分離膜。
- 前記酸素含有官能基を含む炭素ナノチューブは、5~100μg/cm2でコーティングされることを特徴とする、請求項1から8のいずれか一項に記載のリチウム-硫黄電池用分離膜。
- 前記酸素含有官能基を含む炭素ナノチューブは、5~40μg/cm2でコーティングされることを特徴とする、請求項1から9のいずれか一項に記載のリチウム-硫黄電池用分離膜。
- 前記酸素含有官能基を含む炭素ナノチューブは、5~20μg/cm2でコーティングされることを特徴とする、請求項1から10のいずれか一項に記載のリチウム-硫黄電池用分離膜。
- 前記コーティング層は、リチウム-硫黄電池の正極に対向するように形成されたことを特徴とする、請求項1から11のいずれか一項に記載のリチウム-硫黄電池用分離膜。
- 請求項1~12のいずれか1項に記載の分離膜を含むことを特徴とする、リチウム-硫黄電池。
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KR20130040022A (ko) | 2011-10-13 | 2013-04-23 | 중앙대학교 산학협력단 | 고분자 전해질막 및 이를 포함하는 연료 전지 |
RU2635919C1 (ru) | 2013-10-18 | 2017-11-17 | ЭлДжи КЕМ, ЛТД. | Разделительная мембрана и содержащий ее литий-серный аккумулятор |
SI24590A (sl) | 2013-12-09 | 2015-06-30 | Kemijski inštitut | Kemijsko modificirani reducirani grafenov oksid v vlogi separatorja v Ĺľveplovih akumulatorjih |
CN103872282B (zh) | 2014-03-31 | 2016-04-13 | 河南理工大学 | 一种聚合物锂离子电池隔膜及其制备方法 |
KR20170003604A (ko) | 2014-05-05 | 2017-01-09 | 보드 오브 리전츠 더 유니버시티 오브 텍사스 시스템 | 리튬-황 배터리용 이작용성 세퍼레이터 |
FR3023982B1 (fr) * | 2014-07-17 | 2016-08-12 | Blue Solutions | Batterie lithium soufre |
KR101653164B1 (ko) * | 2014-11-25 | 2016-09-01 | 울산과학기술원 | 삼차원구조 집전체, 이의 제조 방법, 이를 포함하는 전극, 상기 전극의 제조방법, 및 상기 집전체를 포함하는 전기 화학 소자 |
KR102038543B1 (ko) | 2016-01-28 | 2019-10-30 | 주식회사 엘지화학 | 폴리도파민을 포함하는 복합 코팅층이 형성된 리튬-황 전지용 분리막, 이의 제조방법 및 이를 포함하는 리튬-황 전지 |
KR101809120B1 (ko) | 2016-11-22 | 2018-01-18 | 주식회사 엘지화학 | 다공성 코팅층을 구비한 세퍼레이터 및 이를 구비한 전기화학소자 |
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KR20190052249A (ko) | 2019-05-16 |
KR102229452B1 (ko) | 2021-03-17 |
WO2019093661A1 (ko) | 2019-05-16 |
EP3678220A4 (en) | 2020-11-25 |
JP2022159474A (ja) | 2022-10-17 |
JP2020535603A (ja) | 2020-12-03 |
EP3678220A1 (en) | 2020-07-08 |
US20210151833A1 (en) | 2021-05-20 |
CN111316470A (zh) | 2020-06-19 |
US11569548B2 (en) | 2023-01-31 |
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