JP2016510941A - より厚い電極製造を可能にするための多層電池電極設計 - Google Patents
より厚い電極製造を可能にするための多層電池電極設計 Download PDFInfo
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Abstract
Description
(A)一実施形態では、カソード構造体103の第1のカソード材料層210は、超低電極多孔度(たとえば、15〜20%多孔度)を達成するために高充填密度を有する「エネルギー層」である。第1のカソード材料層210は約8ミクロン〜約25ミクロンの平均粒径を有するLiCoO2を含む。第1のカソード材料層210は約1〜80ミクロンの平均厚さを有してよい。第2のカソード材料層220は「電力層」であり、約30%〜約60%の多孔度を有する。第2のカソード材料層220は約1〜約6ミクロンの粒径を有するNMC、LiFePO4、またはLiMn2O4を含んでよい。第2のカソード材料層220は約10〜80ミクロンの厚さを有してよい。いくつかの実施形態では、第2のカソード材料層220に対する第1のカソード材料層210の厚さ比は約5:1〜1:5の間である。
実施例B0507−1〜B0507−3に関して、MX−10を有する第1のスラリ混合物がドクターブレード処理を用いて18.5ミクロンの厚さを有するアルミニウム箔集電体上に堆積された。アルミニウム箔集電体および第1のスラリ混合物は、溶媒を蒸発させて第1のカソード材料層を形成するために、摂氏80度に加熱された。MX−3を有する第2のスラリ混合物が第1のカソード材料層上に堆積された。アルミニウム箔集電体、第1のカソード材料層および第2のスラリ混合物は、溶媒を蒸発させて第2のカソード材料層を形成するために、摂氏80度に加熱された。第1のカソード材料層および第2のカソード材料層は2,000と7,000psiの間の圧力で単一のカレンダ処理に曝露された。第1のカソード材料層は65.8ミクロンの最終厚さと36%の最終多孔度を有した。第2のカソード材料層は97.6ミクロンの最終厚さと42%の最終多孔度を有した。
実施例B0508−1〜B0508−3に関して、MX−3を有する第1のスラリ混合物がドクターブレード処理を用いて18.8ミクロンの厚さを有するアルミニウム箔集電体上に堆積された。アルミニウム箔集電体および第1のスラリ混合物は、溶媒を蒸発させて第1のカソード材料層を形成するために、摂氏80度に加熱された。MX−10を有する第2のスラリ混合物が第1のカソード材料層上に堆積された。アルミニウム箔集電体、第1のカソード材料層および第2のスラリ混合物は、溶媒を蒸発させて第2のカソード材料層を形成するために、摂氏80度に加熱された。第1のカソード材料層および第2のカソード材料層は2,000と7,000psiの間の圧力で単一のカレンダ処理に曝露された。第1のカソード材料層は64.6ミクロンの最終厚さと38%の最終多孔度を有した。第2のカソード材料層は110ミクロンの最終厚さと34%の最終多孔度を有した。
Claims (15)
- 導電性基板を提供することと、
カソード活物質を含む第1のスラリ混合物を堆積させて前記導電性基板上に第1のカソード材料層を形成することと、
カソード活物質を含む第2のスラリ混合物を堆積させて前記第1のカソード材料層上に第2のカソード材料層を形成することと、
堆積されたままの状態の前記第1のカソード材料層と前記第2のカソード材料層を圧縮して所望の多孔度を達成することとを含む、多層カソード構造体を形成するための方法。 - 前記第1のスラリ混合物と前記第2のスラリ混合物が各々独立して、
カソード活物質と、
結合剤、結合前駆体、導電性材料および溶媒のうちの少なくとも1つとを含む、請求項1に記載の方法。 - 前記第1のスラリ混合物の固形物量が前記第2のスラリ混合物の固形物量と異なる、請求項1に記載の方法。
- 前記第1のスラリ混合物の前記カソード活物質のタップ密度が前記第2のスラリ混合物の前記カソード活物質のタップ密度と異なる、請求項2に記載の方法。
- 前記第1のスラリ混合物の前記カソード活物質が前記第2のスラリ混合物の前記カソード活物質と異なる、請求項4に記載の方法。
- 前記第1のスラリ混合物の結合剤の重量%が前記第2のスラリ混合物の結合剤の重量%と異なる、請求項4に記載の方法。
- 前記第1のスラリ混合物の粒径分布が前記第2のスラリ混合物の粒径分布と異なる、請求項4に記載の方法。
- 前記第1のスラリ混合物の粒径分布と前記第2のスラリ混合物の粒径分布が各々独立して単モード粒径分布、双モード粒径分布、および多モード粒径分布から選択される、請求項7に記載の方法。
- 堆積されたままの状態の前記第1のカソード材料層と前記第2のカソード材料層を圧縮して所望の多孔度を達成することが、堆積されたままの状態の前記層をカレンダ加工することを含む、請求項4に記載の方法。
- 前記導電性基板がアルミニウムを含む、請求項4に記載の方法。
- 前記第1のスラリ混合物の前記カソード活物質と前記第2のスラリ混合物の前記カソード活物質が各々独立して、二酸化コバルトリチウム(LiCoO2)、二酸化マンガンリチウム(LiMnO2)、二硫化チタン(TiS2)、LiNixCo1−2xMnO2、LiMn2O4、LiFePO4、LiFe1−xMgPO4、LiMoPO4、LiCoPO4、Li3V2(PO4)3、LiVOPO4、LiMP2O7、LiFe1.5P2O7、LiVPO4F、LiAlPO4F、Li5V(PO4)2F2、Li5Cr(PO4)2F2、Li2CoPO4F、Li2NiPO4F、Na5V2(PO4)2F3、Li2FeSiO4、Li2MnSiO4、Li2VOSiO4、LiNiO2、およびこれらの組合せから成る群から選択される、請求項4に記載の方法。
- 前記結合剤が、ポリフッ化ビニリデン(PVDF)、スチレンブタジエンゴム(SBR)、カルボキシメチルセルロース(CMC)、およびこれらの組合せから成る群から選択される、請求項4に記載の方法。
- 前記第1のスラリ混合物の前記カソード活物質が第1の平均直径を有する粒子を含み、前記第2のスラリ混合物の前記カソード活物質が第2の平均直径を有する粒子を含み、前記第2の平均直径が前記第1の平均直径よりも大きい、請求項4に記載の方法。
- 前記第1の平均直径が約2μmと約15μmとの間であり、前記第2の平均直径が約5μmと約15μmとの間である、請求項13に記載の方法。
- 前記第2の平均直径が約2μmと約15μmとの間であり、前記第1の平均直径が約5μmと約15μmとの間である、請求項13に記載の方法。
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PCT/US2014/020788 WO2014149766A1 (en) | 2013-03-15 | 2014-03-05 | Multi-layer battery electrode design for enabling thicker electrode fabrication |
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JP2022500838A (ja) * | 2019-04-04 | 2022-01-04 | エルジー・ケム・リミテッド | リチウム二次電池用電極 |
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CN105098193A (zh) | 2015-09-24 | 2015-11-25 | 宁德时代新能源科技有限公司 | 正极片以及包括该正极片的锂离子电池 |
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AU2017209117B2 (en) * | 2016-01-22 | 2021-10-21 | The Regents Of The University Of California | High-voltage devices |
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TW201442324A (zh) | 2014-11-01 |
US20160013480A1 (en) | 2016-01-14 |
KR20150132463A (ko) | 2015-11-25 |
WO2014149766A1 (en) | 2014-09-25 |
CN105074967A (zh) | 2015-11-18 |
TWI616017B (zh) | 2018-02-21 |
CN105074967B (zh) | 2018-07-10 |
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