FLUOROPOLYMER COMPOSITION, BINDER FOR ELECTROCHEMICAL DEVICE, ELECTRODE MIXTURE, ELECTRODE, AND SECONDARY BATTERY

• Main Authors: YAMADA TAKAYA, TOKUDA HIROTO, NISHIMURA KENTA, YAMANAKA HIROSHI, INOUE RYO, TERADA JUNPEI, ATSUMO MASARU, YAMAMOTO EMI, KATO TAKETO, YASUDA KOHEI
• Format: Patent
• Language: English; Japanese
• Published: 30.07.2024
• Subjects: BASIC ELECTRIC ELEMENTS; CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES ORLIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

To provide: a fluoropolymer composition for use in a binder for an electrochemical device, which is capable of being uniformly mixed with the powder components of an electrochemical device and from which a mixture sheet having excellent strength and flexibility can be obtained; a binder for an electrochemical device using the composition; an electrode mixture; an electrode; and a secondary battery.SOLUTION: There is provided a fluoropolymer composition for use in a binder for an electrochemical device, the fluoropolymer composition containing a fluoropolymer. The fluoropolymer contains two or more tetrafluoroethylene polymers, and the fluoropolymer content is 90 mass% or more with respect to the fluoropolymer composition.SELECTED DRAWING: Figure 1 【課題】電気化学デバイスの粉体成分と均一に混合することができ、また、強度及び柔軟性に優れる合剤シートを得ることができる電気化学デバイス用バインダー用フッ素系ポリマー組成物、並びに、それを用いた電気化学デバイス用バインダー、電極合剤、電極、及び、二次電池を提供する。【解決手段】電気化学デバイス用バインダーに使用されるフッ素系ポリマー組成物であって、フッ素系ポリマーを含み、前記フッ素系ポリマーは、２種以上のテトラフルオロエチレン系ポリマーを含み、前記フッ素系ポリマーの含有量は、前記フッ素系ポリマー組成物に対し、９０質量％以上であるフッ素系ポリマー組成物である。【選択図】 図１