JP2023511212A - 電極の圧延装置及び電極の圧延方法 - Google Patents
電極の圧延装置及び電極の圧延方法 Download PDFInfo
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Images
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/04—Processes of manufacture in general
- H01M4/043—Processes of manufacture in general involving compressing or compaction
- H01M4/0435—Rolling or calendering
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/139—Processes of manufacture
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
Description
図2及び図3は、本発明の一実施形態に係る電極の圧延装置を示した模式図である。
<電極の製造>
負極活物質として黒鉛88重量%及びSiO 10重量%、導電材として単層カーボンナノチューブ(SWCNT)0.05重量%、バインダーとしてSBR(スチレン‐ブタジエンゴム)1.0重量%及び増粘剤としてCMC0.97重量%を水に添加して負極スラリーを製造した。
上記電極を粘着テープと共に圧延ロールに投入して、電極を圧延した。具体的に、上記粘着テープとしてはOPPBOXtape(接着強度:72gf/25mm)を用いた。上記粘着テープは、図2に示すように、アンワインディングロール及びリワインディングロールの間に巻取されており、圧延時にアンワインディングロールから巻出されて、圧延ロール間を走行することで電極と共に圧延される。粘着テープは圧延後に電極から分離されて、リワインディングロールに巻取された。
上記粘着テープとして、日東電工社のN.4605(接着強度:922gf/25mm)を用いたことを除いては、実施例1と同一に電極を製造した後に圧延した。
上記粘着テープとして、3M社のN.9070(接着強度:1727gf/25mm)を用いたことを除いては、実施例1と同一に電極を製造した後に圧延した。
上記電極を、粘着テープを使用せずに、図1のように従来の圧延方法によって圧延したことを除いて、実施例1と同一に電極を製造及び圧延した。
実施例1~3及び比較例による電極に対して、電解液の含浸性を評価した。
10、110:電極
11、111:集電体
12、112:電極活物質層
20、120:圧延ロール
121:上部ロール
122:下部ロール
130:粘着テープ
131:基材
132:粘着層
140:アンワインディングロール
150:リワインディングロール
Claims (12)
- 電極を圧延する一対の圧延ロールと、
前記電極と共に前記圧延ロールに投入されて前記電極と共に圧延され、圧延後に前記電極から分離される粘着テープとを含む、電極の圧延装置。 - 前記粘着テープは、基材及び前記基材の一面に形成された粘着層を含む、請求項1に記載の電極の圧延装置。
- 前記粘着層は、前記基材が前記電極と接触する面に形成される、請求項2に記載の電極の圧延装置。
- 前記粘着テープが巻出されるアンワインディングロール、及び
圧延ロールに投入された前記粘着テープを前記電極から分離した後に巻取するリワインディングロールをさらに含む、請求項1から3のいずれか一項に記載の電極の圧延装置。 - 前記粘着テープは、粘着層の表面に付着された粒子状物質を含む、請求項1から4のいずれか一項に記載の電極の圧延装置。
- 前記粒子状物質は、SiOx(0<x≦2)を含む無機物である、請求項5に記載の電極の圧延装置。
- 電極を製造するステップと、
電極及び粘着テープを一対の圧延ロールに共に投入して圧延するステップと、
圧延ロールに投入された前記粘着テープを前記電極から分離して電極活物質層の表面状態を変化させるステップとを含む、電極の圧延方法。 - 前記粘着テープは、基材及び前記基材の一面に形成される粘着層を含む、請求項7に記載の電極の圧延方法。
- 前記粘着層は、前記基材が前記電極と接触する面に形成される、請求項8に記載の電極の圧延方法。
- 前記粘着テープは、粘着層の表面に付着された粒子状物質を含む、請求項7から9のいずれか一項に記載の電極の圧延方法。
- 前記粒子状物質はSiOx(0<x≦2)を含む無機物である、請求項10に記載の電極の圧延方法。
- 前記粒子状物質は、前記粘着テープと前記電極が共に圧延されることによって前記電極の表面に転写される、請求項10または11に記載の電極の圧延方法。
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