JP6361607B2 - 混練機およびそれを用いる電極活物質を含む電極体の製造方法 - Google Patents
混練機およびそれを用いる電極活物質を含む電極体の製造方法 Download PDFInfo
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- 239000007772 electrode material Substances 0.000 title claims description 44
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- 239000007773 negative electrode material Substances 0.000 description 39
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- 230000000052 comparative effect Effects 0.000 description 8
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- 239000002174 Styrene-butadiene Substances 0.000 description 2
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Description
1.電極活物質ペーストの作製(混練工程)
2.作製した電極活物質ペーストによる,集電体上への電極活物質層の形成(活物質層形成工程)
活物質:黒鉛
増粘材:CMC(カルボキシメチルセルロース)
結着材:SBR(スチレンブタジエンラバー)
混練溶媒:水(イオン交換水)
・小排出流量(0.7L/分),搬送力差なし(従来技術)……左端
・大排出流量(1.4L/分),搬送力差なし(従来技術)……中央
・大排出流量(1.4L/分),搬送力差あり(本形態)………右端
・排出流量:0.7L/分(軸回転速度:600rpm)
・排出流量:1.4L/分(軸回転速度:1200rpm)
「排出流量」:排出される負極活物質ペーストの流量,すなわち混練の処理速度のことである。
「スクリュー外径比」:第1スクリュー羽根11の外径Aを第2スクリュー羽根12の外径Aで割った比である。比較例1,2では,違いがなく1.0であるため,本形態の特徴を満たしていない。このため表1中では斜体字で示している。なお,ローター部13の径Bについては,いずれの比較例および実施例でも,第1スクリュー羽根11と第2スクリュー羽根12とで同一であることとした。
「スクリュー能力比」:第1スクリュー羽根11の搬送力(単位時間当たりの搬送量,ここでは実測値)で,第2スクリュー羽根12の搬送力を割った比である。「スクリュー外径比」の値が大きいほど小さい値となる。比較例1,2では,違いがなく1.0であるため,「スクリュー外径比」と同様に表1中では斜体字で示している。
「粘度ばらつき」:混練により得られる負極活物質ペーストの粘度のばらつき(標準偏差)である。
「残存固形分ばらつき」:混練により得られる負極活物質ペーストにおける,図10で説明した固形物の残存比のばらつき(標準偏差)である。
判定:混練により得られる負極活物質ペーストの品質についての,「粘度ばらつき」および「残存固形分ばらつき」による良否判定である。
◎:「粘度ばらつき」が300mPa・s以下,かつ,「残存固形分ばらつき」が0.2wt%以下のもの。
○:「粘度ばらつき」が1050mPa・s以下,かつ,「残存固形分ばらつき」が0.5wt%以下であって,「◎」に該当しないもの。
×:「◎」にも「○」にも該当しないもの。この「×」判定の理由となる値については,表1中では斜体字で表示している。
3 搬送スクリュー(回転搬送部材)
4 投入口
5 排出口
6 第1搬送区間
7 第2搬送区間
8 混練区間
11 第1スクリュー羽根
12 第2スクリュー羽根
14 ネジ山部
19 混練原料
A ネジ山部の外径
Claims (3)
- 固形分と混練溶媒とを含み固形分率が60重量%以上である混練原料を混練する混練機であって,
前記混練原料の投入を受ける投入口と,前記混練原料が混練されてなる混練物を排出する排出口とが形成されており,
軸回りの回転運動により前記投入口から前記排出口へ向けて前記混練原料を混練しつつ搬送する回転搬送部材を有し,
前記回転搬送部材は,
前記混練原料を混練する混練区間と,
前記混練区間より上流側に位置し前記混練原料を搬送する第1搬送区間と,
前記混練区間より下流側に位置し前記混練原料を搬送する第2搬送区間とを有するものであり,
前記第1搬送区間と前記第2搬送区間とでは,同じ搬送対象物を搬送する場合の搬送力について,後者の方が小さく,
前記回転搬送部材における前記第1搬送区間および前記第2搬送区間にはいずれも,スクリュー羽根が備えられており,
前記第1搬送区間のスクリュー羽根の外径と前記第2搬送区間のスクリュー羽根の外径とでは,1.4以上の比で前者の方が大きいことを特徴とする混練機。 - 電極活物質を含む電極体の製造方法において,
電極活物質を含む混練原料を混練機で混練することで電極活物質ペーストを得る混練工程と,
前記混練工程で得られた電極活物質ペーストを集電体上に塗布することで,集電体上に電極活物質層が形成されたものである電極体を得る物質層形成工程とを有し,
前記混練工程では,
前記混練機として,
混練原料の投入を受ける投入口と,前記混練原料が混練されてなる混練物を排出する排出口とが形成されており,
軸回りの回転運動により前記投入口から前記排出口へ向けて前記混練原料を混練しつつ搬送する回転搬送部材を有し,
前記回転搬送部材は,
前記混練原料を混練する混練区間と,
前記混練区間より上流側に位置し前記混練原料を搬送する第1搬送区間と,
前記混練区間より下流側に位置し前記混練原料を搬送する第2搬送区間とを有するものであり,
前記第1搬送区間と前記第2搬送区間とでは,同じ搬送対象物を搬送する場合の搬送力について,後者の方が小さく,
前記回転搬送部材における前記第1搬送区間および前記第2搬送区間にはいずれも,スクリュー羽根が備えられており,
前記第1搬送区間のスクリュー羽根の外径と前記第2搬送区間のスクリュー羽根の外径とでは,1.2以上の比で前者の方が大きい,ものを使用し,
前記投入口に電極活物質を含む混練原料を投入し,
前記排出口から前記電極活物質ペーストを得ることを特徴とする電極体の製造方法。 - 請求項2に記載の電極体の製造方法において,
前記混練工程にて,前記混練機の前記投入口に投入する混練原料における固形分率を60重量%以上とすることを特徴とする電極体の製造方法。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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JP2015168494A JP6361607B2 (ja) | 2015-08-28 | 2015-08-28 | 混練機およびそれを用いる電極活物質を含む電極体の製造方法 |
KR1020160104392A KR101877865B1 (ko) | 2015-08-28 | 2016-08-17 | 혼련기 및 그것을 이용하는 전극 활물질을 포함하는 전극체의 제조 방법 |
US15/244,555 US10497926B2 (en) | 2015-08-28 | 2016-08-23 | Kneader and manufacturing method of electrode body including electrode active material using the same |
CN201610738977.2A CN106474967B (zh) | 2015-08-28 | 2016-08-26 | 捏合机和使用其的包含电极活性物质的电极体的制造方法 |
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FR1367452A (fr) * | 1963-03-18 | 1964-07-24 | Pie Qui Chante Sa | Procédé et appareils de mise en oeuvre continue des composants entrant dans la fabrication de confiseries et produits nouveaux obtenus par ce procédé |
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JPS5621634A (en) * | 1979-07-30 | 1981-02-28 | Kobe Steel Ltd | Continuous type mixing method |
JPH0790550B2 (ja) * | 1987-02-18 | 1995-10-04 | 東芝機械株式会社 | Pet樹脂フイルム等の屑の再生ペレツト製造装置 |
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JP3365747B2 (ja) * | 1999-06-25 | 2003-01-14 | 株式会社神戸製鋼所 | 連続混練機とその混練方法及び連続混練機のロータ |
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JP2014207180A (ja) * | 2013-04-15 | 2014-10-30 | トヨタ自動車株式会社 | 二次電池の電極製造方法および二次電池の電極製造装置 |
JP2015109175A (ja) * | 2013-12-04 | 2015-06-11 | トヨタ自動車株式会社 | 電極ペーストの製造方法、及び二軸混練機 |
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