ANODE MIXTURE, ANODE, AND SECONDARY BATTERY

To provide an anode mixture that has excellent flexibility, can form an anode material layer that adheres extremely tightly to a metal foil, has excellent cycle characteristics, and can produce batteries with a low gas increase rate even after repeated charge-discharge cycles.SOLUTION: An anode mixt...

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Hauptverfasser:	YAMAZAKI JOKI, TERADA JUNPEI, SUGITANI MAHO, SHIMOOKA TOSHIHARU, ICHINOSE YUMA, HOSODA CHIHIRO, OLEG FILIPPOVICH BOBRENOK, MIKHAIL RUDOLFOVICH PREDTECHENSKIY
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	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
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Zusammenfassung:	To provide an anode mixture that has excellent flexibility, can form an anode material layer that adheres extremely tightly to a metal foil, has excellent cycle characteristics, and can produce batteries with a low gas increase rate even after repeated charge-discharge cycles.SOLUTION: An anode mixture contains single-wall carbon nanotubes, anode active material, and a binding agent. The anode mixture contains, as the anode active material, an anode active material that exhibits a potential of 2.5 V or less with respect to Li when alloyed with or bound to Li. The binding agent contains a fluorine-containing copolymer containing a vinylidene fluoride unit and other monomer units than vinylidene fluoride.SELECTED DRAWING: None 【課題】柔軟性に優れており、金属箔と極めて強固に密着する負極材料層を形成することができ、サイクル特性に優れ、充放電を繰り返した後もガス増加率が低い電池を得ることができる負極合剤を提供すること。【解決手段】単層カーボンナノチューブ、負極活物質および結着剤を含有する負極合剤であって、前記負極活物質として、Ｌｉと合金化した場合またはＬｉと結合した場合に、Ｌｉ基準で２．５Ｖ以下の電位を示す負極活物質を含有し、前記結着剤が、ビニリデンフルオライド単位およびビニリデンフルオライド以外の他の単量体単位を含有する含フッ素共重合体を含有する負極合剤を提供する。【選択図】なし