JP2013507738A - 化学線または電子線硬化型電極結合剤及びそれを含む電極 - Google Patents
化学線または電子線硬化型電極結合剤及びそれを含む電極 Download PDFInfo
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- JP2013507738A JP2013507738A JP2012533304A JP2012533304A JP2013507738A JP 2013507738 A JP2013507738 A JP 2013507738A JP 2012533304 A JP2012533304 A JP 2012533304A JP 2012533304 A JP2012533304 A JP 2012533304A JP 2013507738 A JP2013507738 A JP 2013507738A
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- 239000003504 photosensitizing agent Substances 0.000 description 1
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- 238000003847 radiation curing Methods 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
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Abstract
【選択図】図1
Description
(1)ポリマー結合剤を溶媒で溶解させ、電極固体粒子との混合後に集電体に塗布するのに適切な粘度を有する溶液を調製する。
(2)前記低粘度結合剤溶液を、約20〜80重量%、とりわけ約50重量%の溶媒で前記電極固体粒子と混合し、ペーストを形成する。
(3)従来のコーティング技術を用いて前記ペーストを集電体上にコーティングし、薄層(一般的に10ないし200ミクロン)を形成する。
(4)コーティングされた集電体を熱乾燥オーブンに入れ、前記溶媒の蒸発除去及び前記結合剤ポリマーの硬化を行う。
(5)このようにして作製した電極集電体を、狭い隙間(例えば5〜200ミクロン)で互いに離間された一対の回転ローラの間に通して、集電体コーティングを所定の厚さに圧縮する。
(6)一般的には、電極集電体の両面をアノード/カソード粒子でコーティングし、上述したステップで処理する。
(a)ポリマー結合剤を溶解させるのに用いられる溶媒を蒸発させなければならないので、大きな熱エネルギー入力が必要となる。
(b)熱乾燥に関連するエネルギー効率が非常に悪い。
(c)蒸発させた溶媒を回収し、廃棄するかまたは再利用する必要がある。
(d)ポリマー結合剤を乾燥させるのに必要なオーブンが大きな作業スペースを占めるので、大きな資本コストがかかる。
(e)乾燥オーブン内でポリマー結合剤を乾燥させるの時間がかかるため、前記電極の製造に要する時間が長くなる。
(a)電極結合剤を硬化させるための処理時間を大幅に短縮することができる。
(b)熱硬化オーブン及びそれに関連するエネルギー効率の悪い熱乾燥の必要性を排除し、その代わりに化学線/電子線硬化ステーションを用いることにより、資本コスト及び操業コストを大幅に削減することができる。
(c)熱硬化に関連するスペース、建物、インフラ及びメンテナンスを大幅に減らすことができる。例えば、従来の熱硬化ラインは100ftの長さであり、ライン速度は10〜20ft/分である。一方、本発明では、2つのUVランプを(100フィートの製造ラインの代わりに)2フィートの長さに配置し、200ft/分で電池を製造する。熱硬化ラインの速度を200フィート/分にするためには、製造ラインの熱硬化セクションを1000〜2000ftの長さにする、すなわち建物の長さを0.2〜0.4マイルにする必要がある。
(d)有機溶媒の必要性を大幅に削減するかまたは排除することができるので、蒸発性有機化合物(VOC)の調達、回収及び廃棄コストを大幅に削減するかまたは排除することができる。
2Ciba Specialty Chemicals社(Tarrytown, NY)製のUV光開始剤
3Kuraray Co. Ltd.社(Pasadena, TX)製の反応性液状ゴムオリゴマー
4Sartomer Co.社(Exton, PA)製のポリエチレングリコール200ジアクリレート反応性希釈剤モノマー
5Sartomer Co.社(Exton, PA)製のイソボルニルアクリレート反応性希釈剤モノマー
6Lamberti USA Inc.社(Conshohocken, PA)製のUV光開始剤
7Ciba Specialty Chemicals社(Tarrytown, NY)製のUV光開始剤
8Momentive Performance Materials社(Albany, NY)製の8γ−グリシドキシプロピルトリメトキシシラン結合剤
2Chitec Technology Corp.社(Taipei, Taiwan)製の光増感剤
3Ciba Specialty Chemicals社(Tarrytown, NY)製のUV光開始剤
4Sartomer Co.社(Exton, PA)製のイソボルニルアクリレート反応性希釈剤モノマー
5Sartomer Co.社(Exton, PA)製のヘキサンジオールアクリレート反応性希釈剤モノマー
6Sartomer Co.社(Exton, PA)製のポリブタジエンジメチルジメチルアクリレートオリゴマー
7Rahn USA Corp社(Aurora, IL)製の分散剤
8Chitec Technology Corp.社(Taipei, Taiwan)製の光開始剤
9Sartomer Co.社(Exton, PA)製のアルコキシ化ヘキサンジオールジアクリレート反応性希釈剤モノマー
10Sigma-Aldrich Co社(St. Louis, MO)製の炭素粉末
11Sigma-Aldrich Co社(St. Louis, MO)製のリチウムコバルト酸化物
12Sigma-Aldrich Co社(St. Louis, MO)製のリチウムマグネシウム酸化物
13Chitec Technology Corp.社(Taipei, Taiwan)製の光開始剤
14Timcal Graphite and Carbon社(Westlake, Ohio)製のグラファイト
15Worldchem LTD社,(Hafei, Anhui, China)製のN−メチル−2−ピロリドン
Claims (18)
- 電極であって、
集電体と、該集電体の表面に結合されたポリマー層とを含み、
前記ポリマー層が、官能化ゴムポリマーから形成された架橋化マトリクス及び導電性粒状物質を含み、
前記架橋化マトリクスが、前記官能化ゴムポリマーに共有結合された化学線/電子線反応硬化型架橋剤を含むことを特徴とする電極。 - 請求項1に記載の電極であって、
前記官能化ゴムポリマーが、イソプレン、ブタジエン、シクロペンタジエン、エチリデンノルボルネンまたはビニルノルボルネンのモノマー単位のうちの少なくとも1つ、あるいはそれらの組み合わせを含むことを特徴とする電極。 - 請求項1または請求項2に記載の電極であって、
前記架橋剤が、前記官能化ゴムポリマーに、該ゴムポリマーのカルボキシ、アクリル、ビニル、ビニルエーテルまたはエポキシ反応性官能基を介して共有結合されていることを特徴とする電極。 - 請求項1ないし請求項4のいずれか一項に記載の電極であって、
前記粒状物質が、グラフェン、活性炭、グラファイト、低硫黄グラファイト、カーボンナノチューブまたはそれらの組み合わせ等の炭素を含むことを特徴とする電極。 - 請求項1ないし請求項5のいずれか一項に記載の電極であって、
前記粒状物質が金属酸化物塩またはリチウム化合物を含むことを特徴とする電極。 - 請求項1ないし請求項6のいずれか一項に記載の電極であって、
当該電極に隣接して、第2の電極またはセパレータ等の追加的な層が設けられ、
前記追加的な層の1若しくは複数が随意的に電解質を含むことを特徴とする電極。 - 請求項1ないし請求項7のいずれか一項に記載の電極であって、
前記ポリマー層が約1ミクロンないし約500ミクロンの厚さを有することを特徴とする電極。 - 請求項1ないし請求項8のいずれか一項に記載の電極を含む、リチウムイオン電池等の電池。
- 請求項1ないし請求項8のいずれか一項に記載の電極を含む電気二重層コンデンサ。
- 電極の作製方法であって、
官能化ゴムポリマー及び、化学線または電子線に曝露したときに共有結合を形成することができる架橋剤を含み、かつ約20パスカル秒未満あるいは約10パスカル秒未満の溶融粘度を有する結合剤コーティング組成物を電極粒状物質と混合して混合物を調製するステップと、
前記混合物を集電体の表面に塗布して混合物層を形成するステップと、
前記混合物層を化学線または電子線に曝露し、それにより前記官能化ゴムポリマーを架橋結合させるステップとを含む方法。 - 請求項11に記載の方法であって、
前記結合剤コーティング組成物が、前記官能化ゴムポリマーを該組成物の約20重量%ないし100重量%の量で含有することを特徴とする方法。 - 請求項11または請求項12に記載の方法であって、
前記結合剤コーティング組成物が、反応性希釈剤、湿潤剤及び光開始剤のうちの1若しくは複数をさらに含むことを特徴とする方法。 - 請求項11ないし請求項13のいずれか一項に記載の方法であって、
前記架橋剤が反応性希釈剤であることを特徴とする方法。 - 請求項11ないし請求項14のいずれか一項に記載の方法であって、
前記電極粒状物質が、炭素、金属酸化物またはリチウム化合物を含むことを特徴とする方法。 - 請求項11ないし請求項15のいずれか一項に記載の方法であって、
前記官能化ゴムポリマー及び前記電極粒状物質を粉砕するステップをさらに含むことを特徴とする方法。 - 請求項11ないし請求項16のいずれか一項に記載の方法であって、
前記電極に第2の電極を積層配置するステップをさらに含むことを特徴とする方法。 - 請求項11ないし請求項17のいずれか一項に記載の方法であって、
前記第1の電極と前記第2の電極との間にセパレータを配置するステップをさらに含むことを特徴とする方法。
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JP2016524791A (ja) * | 2013-05-17 | 2016-08-18 | ミルテック・コーポレーション | 化学線および電子ビーム線硬化性の水をベースとする電極結合剤およびこの結合剤を組み込んだ電極 |
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JP2017017299A (ja) * | 2015-04-23 | 2017-01-19 | 株式会社ジェイテクト | リチウムイオンキャパシタ |
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BR112012008115A2 (pt) | 2017-10-10 |
BR112012008115A8 (pt) | 2018-04-03 |
CA2777094A1 (en) | 2011-04-14 |
KR101747468B1 (ko) | 2017-06-14 |
US20140245599A1 (en) | 2014-09-04 |
US9543565B2 (en) | 2017-01-10 |
EP2486615B1 (en) | 2016-04-06 |
JP5771211B2 (ja) | 2015-08-26 |
US8906548B2 (en) | 2014-12-09 |
CN102742047A (zh) | 2012-10-17 |
EP2486615A1 (en) | 2012-08-15 |
WO2011044310A1 (en) | 2011-04-14 |
US20110081575A1 (en) | 2011-04-07 |
KR20120100976A (ko) | 2012-09-12 |
CN102742047B (zh) | 2016-02-24 |
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