BINDER COMPOSITION, MIXTURE FOR MANUFACTURING ELECTRODE FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERY, ELECTRODE FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERY, AND NONAQUEOUS ELECTROLYTE SECONDARY BATTERY

• Main Authors: SAKAKIBARA YUKITARO, KOBAYASHI SHOTA, ASHIDA KANA, AOKI KENTA
• Format: Patent
• Language: English; Japanese
• Published: 19.09.2019
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

To provide a binder composition of a nonaqueous electrolyte secondary battery, which contains a vinylidene fluoride polymer and which can further increase the adhesion strength of an electrode mixture layer to a surface of a current collector.SOLUTION: A binder composition of a nonaqueous electrolyte secondary battery comprises a vinylidene fluoride copolymer for a binder of a nonaqueous electrolyte secondary battery, which has: a first constituting unit originating from vinylidene fluoride; and a second constituting unit having an isocyanate group or a structure that produces an isocyanate group when heated at 200°C for one hour. The binder composition can be used for a mixture to manufacture an electrode for a nonaqueous electrolyte secondary battery, an electrode for a nonaqueous electrolyte secondary battery, and a nonaqueous electrolyte secondary battery.SELECTED DRAWING: None 【課題】集電体の表面への電極合剤層の接着強度をより高めることができる、フッ化ビニリデン重合体を含む非水電解質二次電池のバインダー組成物を提供すること。【解決手段】フッ化ビニリデンに由来する第１の構成単位と、イソシアネート基、または、２００℃で１時間加熱したときにイソシアネート基を生成する構造、を有する第２の構成単位と、を有する、非水電解質二次電池のバインダー用のフッ化ビニリデン共重合体を含む、非水電解質二次電池のバインダー組成物。当該バインダー組成物は、非水電解質二次電池用電極を製造するための合剤、非水電解質二次電池用の電極および非水電解質二次電池に使用することができる。【選択図】なし