METHOD FOR MANUFACTURING LITHIUM SECONDARY BATTERY NEGATIVE ELECTRODE

• Main Authors: OSAWA RYOSUKE, TSUJIKO AKIRA, TANIGUCHI AKIHIRO, OHARA KEISUKE, INOUE KAORU
• Format: Patent
• Language: English; Japanese
• Published: 24.10.2019
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

To provide a method for manufacturing a lithium secondary battery negative electrode, capable of achieving both suppression of deterioration in cycle characteristics and suppression of deterioration in charge depth in performing fast charge.SOLUTION: There is provided a method for manufacturing a lithium secondary battery negative electrode which includes: mixing graphite, silicon oxide, carbon nanotubes, a binding material, and a solvent to prepare a paste: applying the paste on the surface of a negative electrode current collector; and applying a magnetic field on the paste that has been applied on the surface of the negative electrode current collector, thereby orienting an edge face of the graphite to face the negative electrode current collector.SELECTED DRAWING: Figure 1 【課題】サイクル特性の低下の抑制と、急速充電を行った際における充電深度の低下の抑制とを両立させ得る、リチウム二次電池用負極の製造方法を提供すること。【解決手段】黒鉛、酸化珪素、カーボンナノチューブ、結着材および溶媒を混合することによりペーストを調製すること、ペーストを負極集電体の表面に塗布すること、負極集電体の表面に塗布されたペーストに磁場を加えることにより黒鉛のエッジ面を負極集電体に面するように配向させることを含む、リチウム二次電池用負極の製造方法が提供される。【選択図】図１