BINDER RESIN FOR NONAQUEOUS SECONDARY BATTERY NEGATIVE ELECTRODE, SLURRY COMPOSITION FOR NONAQUEOUS SECONDARY BATTERY NEGATIVE ELECTRODE, NEGATIVE ELECTRODE FOR NONAQUEOUS SECONDARY BATTERY, AND NONAQUEOUS SECONDARY BATTERY

• Main Authors: OKADA HARUKI, FUJIE FUMIKO, MOMOSE HIKARU, NODONO MITSUFUMI, MATSUMOTO AKIKAZU, MOMOSE FUMINO
• Format: Patent
• Language: English; Japanese
• Published: 27.11.2014
• Subjects: BASIC ELECTRIC ELEMENTS; CHEMISTRY; COMPOSITIONS BASED THEREON; ELECTRICITY; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; THEIR PREPARATION OR CHEMICAL WORKING-UP

PROBLEM TO BE SOLVED: To provide a binder resin for a nonaqueous secondary battery negative electrode, which can improve dispersion stability of a slurry composition for a negative electrode, flexibility of a negative electrode, and adhesiveness between a negative electrode mixture layer and a collector, and to provide a negative electrode for a nonaqueous secondary battery including the binder resin, and a nonaqueous secondary battery including the negative electrode for a nonaqueous secondary battery.SOLUTION: The binder resin for a nonaqueous secondary battery negative electrode contains a (co)polymer (I) containing a monomer unit expressed by general formula (1) and having a mass average molecular weight of 1000000 to 50000000, by 40 to 100 parts by mass in the binder resin. In formula (1), one of Rand Ris a hydrogen atom or a linear or branched alkyl group having 1 to 12 carbon atoms, and the other is a linear or branched alkyl group having 1 to 12 carbon atoms; and n is an integer of 1 to 500000. 【課題】負極用スラリー組成物の分散安定性、負極電極の可とう性、及び負極合剤層と集電体との密着性が向上しうる非水二次電池負極用バインダー樹脂、該バインダー樹脂を備えた非水二次電池用負極、及び該非水二次電子用負極を備えた非水二次電池を提供する。【解決手段】下記一般式（１）で表される単量体単位を含み、質量平均分子量が１００万〜５０００万である（共）重合体（Ｉ）をバインダー樹脂中の４０〜１００質量含有する非水二次電池負極用バインダー樹脂。［化１］（式（１）中、Ｒ１およびＲ２は、Ｒ１およびＲ２の一方が水素原子または炭素数１〜１２の直鎖又は分岐のアルキル基であり、他方が炭素数１〜１２の直鎖又は分岐のアルキル基である。ｎは１〜５０００００の整数である。）【選択図】なし