JP7055081B2 - 集電体及びバインダーを使用せずに電池タブ連結構造を自立電極に埋め込む方法 - Google Patents
集電体及びバインダーを使用せずに電池タブ連結構造を自立電極に埋め込む方法 Download PDFInfo
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Description
本出願は、米国特許出願第62/559,254号(2017年9月15日出願、代理人整理番号037110.01018、発明の名称「Method and Structure for Battery Tab Attachment to a Self-Standing Electrode Without Current Collector or Binder」)の優先権を主張するものであり、この参照により当該米国特許出願の内容全体を援用する。
形成過程において、幅及び厚さが小さい導電性の帯/ワイヤ/格子が、自立電極に埋め込まれる(図1A~図1D)。この目的のため、金属片101が、(スペーサー103を用いて)フリット又はメッシュ102の上方に間隔hを開けて、配置される(図1A~図1B)。金属片101は、アルミニウム又は銅の薄い帯、ワイヤ、又はメッシュであってよく、フリット又はメッシュ102は、電極活物質粉末とカーボンナノチューブ添加剤の混合物を同時に沈着させるための基板/フィルターとして機能する。非限定的な一例において、カーボンナノチューブ添加剤は、単層カーボンナノチューブ、多層カーボンナノチューブ、又はこれらの混合物を含んでよい。帯又はワイヤ101の寸法は、電極サイズと比べて、大幅に小さくすることができる。混合物104を沈着させて電極フィルムを形成する間、金属帯、ワイヤ、又はメッシュ101の周囲、下方、上方に、及び/又は接触して、電極活物質及びカーボンナノチューブ添加剤が成長し、電極活物質とカーボンナノチューブ添加剤の混合物中に金属構造101が封入される(図1C~図1D)。フリット102は、方向105において、ガスフィルターとしても機能する。その後、ローラーミル又は他の方法によって、金属構造101を内部に有する電極フィルム106を所望の密度までプレス処理し、金属構造が埋め込まれた自立複合材電極を得る。金属構造101(箔、帯、ワイヤ、メッシュ、格子等)が電極106の外部に突出し、電気的タブ連結位置を形成していてもよい。溶接又は他の方法によってタブを連結してもよい。この方法の変形例では、埋め込まれた導電性構造は、それ自体が電極形成/沈着時に基板/フィルターとして機能する、金属メッシュ又は(例えば導電性ポリマーからなる)導電性の透過性膜であってよい。このような構造は、気相(例えばエアロゾル)から電極を成長させる際にも、液相(例えば混合物又は懸濁液)から沈着させる際にも使用できる。次に、上述したように、プレス処理によって導電性の基板/フィルターを材料中に埋め込む。図2Aは、フリット上のアルミニウムメッシュ101の例を示している。図2Bは、図2Aの物にカーボンナノチューブ(CNT)と電極活物質の混合物を沈着させた例を示している。図2Cは自立電極中に埋め込まれたアルミニウムメッシュ101の例を示している。
Claims (14)
- 電極活物質と、三次元網目構造を有するカーボンナノチューブとの複合材よりなる自立電極材料と、前記自立電極材料に埋め込まれた電池タブ連結構造とを有し、バインダー及び集電体を含まない自立電極であって、
前記電池タブ連結構造は、第1面と、前記第1面と反対側の第2面と、を有し、
前記第1面及び前記第2面の各々の少なくとも一部は、前記自立電極材料に接触する、
自立電極。 - 請求項1記載の自立電極において、
前記電極活物質は、グラファイト、硬質炭素、ケイ素、酸化ケイ素、リチウム金属酸化物、及びリン酸鉄リチウムから選択される、
自立電極。 - 請求項1記載の自立電極において、
前記電池タブ連結構造は、金属を含む、
自立電極。 - 請求項3記載の自立電極において、
前記金属は、銅、アルミニウム、ニッケル、又はステンレス鋼である、
自立電極。 - 請求項1記載の自立電極において、
前記自立電極の全厚は、10μm~5000μmである、
自立電極。 - 請求項1記載の自立電極において、
前記自立電極の全厚は、20μm~100μmである、
自立電極。 - 請求項1記載の自立電極において、
前記電池タブ連結構造の幅は、前記自立電極の全幅の10%~50%である、
自立電極。 - 請求項1記載の自立電極において、
前記電池タブ連結構造の幅は、前記自立電極の全幅の10%~30%である、
自立電極。 - 請求項1記載の自立電極において、
前記電池タブ連結構造の幅は、前記自立電極の全幅の3%~10%である、
自立電極。 - 請求項1記載の自立電極において、
前記電池タブ連結構造は、導電性炭素構造を有する、
自立電極。 - 請求項10記載の自立電極において、
前記導電性炭素構造は、前記カーボンナノチューブ、グラフェン、炭素繊維、グラファイト、その他の導電性炭素同素体、これらの組み合わせ、又はこれらの複合材を含む、
自立電極。 - 請求項11記載の自立電極において、
前記導電性炭素構造の前記カーボンナノチューブ及び/又は前記炭素繊維は、ナノチューブ糸(yarn、thread)、ナノチューブ布、ナノチューブワイヤ、ナノチューブ紙、ナノチューブマット、ナノチューブシート、又はナノチューブフェルトの形態である、
自立電極。 - 請求項1記載の自立電極において、
前記自立電極は、所定の全長、全幅及び全厚を有し、前記電池タブ連結構造は、前記自立電極の幅の1%~50%の幅を有する、
自立電極。 - 請求項1記載の自立電極の製造方法であって、前記自立電極材料は、
前記電極活物質をエアロゾル化又は流動化してエアロゾル化電極活物質又は流動化電極活物質を調製する工程と、
前記エアロゾル化電極活物質又は前記流動化電極活物質を、前記カーボンナノチューブと共に第1多孔質表面の上に堆積させて、前記電池タブ連結構造が内部に埋め込まれた前記自立電極材料を形成する工程と、
前記第1多孔質表面から前記自立電極材料を剥離させる工程と、により形成される、
自立電極の製造方法。
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Application Number | Priority Date | Filing Date | Title |
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US201762559254P | 2017-09-15 | 2017-09-15 | |
US62/559,254 | 2017-09-15 | ||
US16/123,872 | 2018-09-06 | ||
US16/123,872 US11121358B2 (en) | 2017-09-15 | 2018-09-06 | Method for embedding a battery tab attachment in a self-standing electrode without current collector or binder |
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JP2019075366A JP2019075366A (ja) | 2019-05-16 |
JP2019075366A5 JP2019075366A5 (ja) | 2021-10-28 |
JP7055081B2 true JP7055081B2 (ja) | 2022-04-15 |
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DE112020003504T5 (de) * | 2019-07-22 | 2022-10-20 | Honda Motor Co., Ltd. | Streckbare und flexible lithium-ionen-batterie |
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