JP7504246B2 - 改良されたバッテリーセパレータおよび関連する方法 - Google Patents
改良されたバッテリーセパレータおよび関連する方法 Download PDFInfo
- Publication number
- JP7504246B2 JP7504246B2 JP2023017641A JP2023017641A JP7504246B2 JP 7504246 B2 JP7504246 B2 JP 7504246B2 JP 2023017641 A JP2023017641 A JP 2023017641A JP 2023017641 A JP2023017641 A JP 2023017641A JP 7504246 B2 JP7504246 B2 JP 7504246B2
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- JP
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- Prior art keywords
- microporous membrane
- battery
- nonwoven fabric
- battery separator
- separator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- ISXSCDLOGDJUNJ-UHFFFAOYSA-N tert-butyl prop-2-enoate Chemical compound CC(C)(C)OC(=O)C=C ISXSCDLOGDJUNJ-UHFFFAOYSA-N 0.000 description 2
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- TVEXGJYMHHTVKP-UHFFFAOYSA-N 6-oxabicyclo[3.2.1]oct-3-en-7-one Chemical compound C1C2C(=O)OC1C=CC2 TVEXGJYMHHTVKP-UHFFFAOYSA-N 0.000 description 1
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- HCDGVLDPFQMKDK-UHFFFAOYSA-N hexafluoropropylene Chemical group FC(F)=C(F)C(F)(F)F HCDGVLDPFQMKDK-UHFFFAOYSA-N 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
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Images
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Description
本出願は、2015年8月17日出願日のアメリカ合衆国仮特許出願シリアル番号62/205,805の優先権および権益を請求し、ここに参照によって本願明細書に完全に組み込まれる。
リチウム電池は、典型的には、アノード、カソード、アノードとカソードとの間のセパレータ、アノードとカソードとの間のイオン連通した電解質(例えば、電解質が場合によってはセパレータを通って流れ、および滞留する)、および上記構成要素を収容する容器を含む。
米国特許第6881515号は、参照により本明細書に組み込まれるが、両側にゲル形成ポリマーおよび可塑剤で被覆された微多孔質膜を有するポリマー電池のためのセパレータを開示している。ゲル形成ポリマーは、ポリフッ化ビニリデン(PVDF)およびそのコポリマーであり得る。
不織布に接着結合されたシャットダウンされた微多孔質膜を有するリチウム電池用の電池セパレータを開示する。
少なくともある特定のリチウム電池のような少なくともある特定の電池の性能および安全性を改善する新規のまたは改良された電池セパレータが依然として必要とされている。
は現在好ましい実施態様が示されている。しかしながら、本発明は、示された正確な配置および手段に限定されないことが理解される。
ト(PET)、ポリブチレンテレフタレート(PBT)、ポリエチレンナフタレート(PEN)、ポリトリメチレンテレフタレート(PTT)、前記のコポリマー、および前記のブレンドからなる群から選択し得る。
微多孔質膜または層14は、約0.02~約2ミクロンの範囲の平均細孔径を有し得る。微多孔質膜14は、約0.04~約0.5ミクロンの範囲の平均細孔径を有し得る。
前記のコポリマー、および前記のブレンドからなる群から選択され得る。さらに別の実施態様において、ポリオレフィンはポリプロピレン(PP)であってもよい。さらに別の実施態様において、一方のプライはポリエチレンベースのポリマーから製造され、他方のプライはポリプロピレンベースのポリマーから製造されてもよい。
側面に、または微多孔質膜の両面に、または不織布および/または膜の片面または両面に適用し得る。
はセル、リチウムイオン電池、またはリチウム二次電池、電池パック、モジュール、システム、デバイス、車両などに使用することができる。本開示または本発明は、新規のまたは改良された電池セパレータ、積層セパレータ、複合セパレータ、被覆積層セパレータ、被覆複合セパレータ、リチウム電池セパレータ、および/またはセパレータの製造方法、および/またはかかるセパレータまたはかかるセパレータを含むバッテリを使用する方法に関する。少なくともある選択された実施態様によれば、本開示または本発明は、被覆された不織布に積層された微多孔質膜を含む新規のまたは改良されたリチウム電池セパレータに関し、コーティングは、ポリマーおよび任意にフィラーまたは粒子を含み得、および/または微多孔質膜と不織布を巻き戻し、不織布と微多孔質膜を積層し、積層の前または後に不織布をコーティングする各ステップを含む方法に関する。
その上に積層された不織布を有する微多孔質膜、および/または前記電池セパレータは、リチウム電池用の電池セパレータであって、前記電池セパレータは、リチウムイオン電池用の電池セパレータであって、前記電池セパレータは、リチウム二次電池用電池セパレータであって、および/または前記不織布がポリマー繊維から製造され、およびポリマーは、ポリオレフィン、ポリエステル、フルオロポリマー、例えばPVDF、ポリアミド(例えば、ナイロン)、ポリアラミド(KEVLAR、NOMEX)、アクリル、PVC、または他のポリマーの群から選択され、前記ポリエステルは、ポリエチレンテレフタレート(PET)、ポリブチレンテレフタレート(PBT)、ポリエチレンナフタレート(PEN)、ポリトリメチレンテレフタレート(PTT)、これらのコポリマーおよびこれらのブレンドからなる群から選択され、前記不織布が二成分繊維(ヘテロフィル)から製造され、前記二成分繊維が、芯鞘型繊維、接合型繊維、海島繊維およびそれらの組み合わせからなる群から選択され、前記二成分繊維は、低溶融温度成分および高溶融温度成分を有し、低溶融成分は、高溶融温度成分よりも低い溶融温度を有し、低溶融温度成分がポリオレフィンであり、該ポリオレフィンが、ポリエチレン(PE)、ポリプロピレン(PP)、ポリメチルペンテン(PMP)、ポリブテン(PB)、これらのコポリマーおよびブレンドからなる群から選択され、前記高溶融温度成分は、ポリエステル、ポリアミド(例えばナイロン)、フルオロポリマー(例えばTEFLON(登録商標))、アラミド(KEVLAR、NOMEX)、液晶ポリマー(VECTRAN)、ポリベンズイミダゾール(PBI)、ポリベンゾビスオキサゾール(PBO)からなる群から選択され、前記二成分繊維が、ポリオレフィンシースと、ポリエステル、ポリアミド(例えばナイロン)、フルオロポリマー(例えばTEFLON(登録商標))、アラミド(KEVLAR、NOMEX)、液晶ポリマー(VECTRAN)、ポリベンズイミダゾール(PBI)、ポリベンゾビスオキサゾール(PBO)からなる群から選択されるポリマーから製造された芯とを有し、前記二成分繊維が、ポリエチレンシースと、ポリエステル、ポリアミド(例えば、ナイロン)、フルオロポリマー(例えばTEFLON(登録商標))、アラミド(KEVLAR、NOMEX)、液晶ポリマー(VECTRAN)、ポリベンズイミダゾール(PBI)、ポリベンゾビスオキサゾール(PBO)からなる群から選択されたポリマーから製造された芯を有する。
前記のブレンドからなる群から選択され、前記ポリオレフィンがポリエチレン(PE)であり、一方のプライは、ポリオレフィンから製造され、前記ポリオレフィンは、ポリエチレン(PE)、ポリプロピレン(PP)、ポリメチルペンテン(PMP)、ポリブテン(PB)、これらのコポリマーおよびこれらのブレンドからなる群から選択され、前記ポリオレフィンが、ポリプロピレン(PP)、前記のコポリマーおよび前記のブレンドからなる群から選択され、前記ポリオレフィンがポリプロピレン(PP)であり、一方のプライはポリエチレン系ポリマーから製造され、他方のプライはポリプロピレン系ポリマーから製造され、前記微多孔質膜は、3つのプライを有し、少なくとも2つのプライは異なるポリマーから製造され、少なくとも2つのプライは同じポリマーから製造され、外側のプライは同じポリマーから製造され、内側のプライは異なるポリマーから製造され、同じポリマーは、ポリオレフィンであり、ポリオレフィンは、ポリエチレン(PE)、ポリプロピレン(PP)、ポリメチルペンテン(PMP)、ポリブテン(PB)、これらのコポリマーおよびこれらのブレンドからなる群から選択される。
-微多孔質膜を巻き戻しするステップ、
-不織布をコーティング材料でコーティングするステップ、および
-コーティングされた不織布を微多孔質膜に積層するステップ、
を含む前記方法を含み、
および/またはコーティング材料が強誘電体材料を含有し、前記コーティング材料が強誘電体材料とフィラーとを含有し、コーティングが、前記コーティング材料を噴霧、浸漬、接触コーティングおよび/またはブラッシングすることである。
不織布を巻き戻しするステップ、
微多孔質膜を巻き戻しするステップ、
不織布を微多孔質膜にラミネートするステップ、および
不織布をコーティング材料でコーティングするステップ、
を含み、および/または
コーティング材料が強誘電体材料を含有し、前記コーティング材料が、強誘電体材料とフィラーとを含有し、および/またはコーティングが、前記コーティング材料をその上に噴霧、浸漬、接触コーティング、および/またはブラッシングし、および/または本明細書に示され、開示された、電池セパレータ、電池、および/または方法を含む。
Claims (11)
- リチウム電池用の電池セパレータであって、
少なくとも1つのポリオレフィン微多孔質膜と、
前記微多孔質膜の少なくとも1つの側の少なくとも1つの不織布層であって、前記微多孔質膜に結合される不織布層と、
を含み、
前記不織布層が、ポリエチレンオキシド(PEO)、ポリアクリロニトリル(PAN)、ポリテトラエチレングリコールジアクリレート、およびこれらを含むブレンドからなる群から選択される少なくとも1つのフェロエレクトリックポリマーと、
ポリトリメチレンテレフタレート(PTT)繊維、PTTコポリマー繊維、およびそのブレンドからなる群から選択されるポリマー繊維と、
を含み、
前記微多孔質膜が、
20~80%の範囲の多孔度と、
0.02~2μmの範囲の平均孔径と、
15~150秒の範囲のガーレー数と
を有する、
前記電池セパレータ。 - 前記電池セパレータが、二次リチウム電池、リチウムイオン電池、またはリチウムポリマー電池用の電池セパレータである、請求項1に記載の電池セパレータ。
- 前記不織布が0.5ミル(12.7μm)未満の厚さを有する、請求項1に記載の電池セパレータ。
- 前記不織布が0.25ミル(6.4μm)未満の厚さを有する、請求項1に記載の電池セパレータ。
- 前記微多孔質膜が28~60%の範囲の多孔度を有する、請求項1に記載の電池セパレータ。
- 前記微多孔質膜が0.08~0.5μmの範囲の平均孔径を有する、請求項1に記載の電池セパレータ。
- 前記微多孔質膜が30~80秒の範囲のガーレー数を有する、請求項1に記載の電池セパレータ。
- 前記微多孔質膜が少なくとも2つのプライを有しており、各プライは異なるポリマーから製造される、請求項1に記載の電池セパレータ。
- 前記ポリマー繊維が二成分繊維である、請求項1に記載の電池セパレータ。
- 請求項1に記載のセパレータを含む電池。
- 請求項10に記載の電池を含む車両。
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WO2017031159A1 (en) | 2017-02-23 |
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US11813830B2 (en) | 2023-11-14 |
US20220115742A1 (en) | 2022-04-14 |
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CN108140787A (zh) | 2018-06-08 |
US20170062785A1 (en) | 2017-03-02 |
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