ELECTRODE STRUCTURE FOR POWER STORAGE DEVICE, POWER STORAGE DEVICE, AND METHOD FOR MANUFACTURING ELECTRODE STRUCTURE

• Main Author: KAWAKAMI SOICHIRO
• Format: Patent
• Language: English; Japanese
• Published: 02.11.2017
• 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

PROBLEM TO BE SOLVED: To provide: an electrode structure having a high capacity and a long life, in which the increase in electrode resistance and the reduction in a discharge capacity owing to the repetition of charge and discharge are suppressed; a power storage device; and a method for manufacturing the electrode structure.SOLUTION: An electrode structure for a power storage device comprises an active material, a conductive auxiliary material, a binder and a current collector. The binder includes a graft polymer, in which a trunk polymer portion is formed by a water-soluble polymer, and a branch polymer portion of the graft polymer is formed by a conductive polymer. In a power storage device, the electrode structure is used for a negative electrode and/or a positive electrode. A method for manufacturing the electrode structure comprises the steps of: preparing a slurry by mixing at least an active material, a conductive auxiliary material, a water-soluble polymer, a solvent of the water-soluble polymer, monomers which polymerize into a conductive polymer, a crosslinking agent and/or a polymerization initiator; and coating a current collector with the slurry, followed by polymerization and drying thereof.SELECTED DRAWING: None 【課題】充放電の繰り返しにおける電極抵抗の増加ならびに放電容量の低下が抑制される高容量で長寿命の電極構造体、ならびに蓄電デバイスを提供する。また、上記電極構造体の製造方法を提供する。【解決手段】活物質、導電補助材、バインダー、集電体から成り、該バインダーがグラフトポリマーから成り、幹ポリマー部が水溶性ポリマーで、該グラフトポリマーの枝分かれポリマー部が導電性ポリマーであることを特徴とする蓄電デバイス用電極構造体、並びに該電極構造体を負極及び/又は正極に用いた蓄電デバイス。また、少なくとも活物質、導電補助材、水溶性ポリマー、該水溶性ポリマーの溶媒、重合して導電性ポリマーとなるモノマー、架橋剤及び／又は重合開始剤、を混合してスラリーを調製し、集電体に該スラリーを塗工した後、重合し乾燥する工程を有することを特徴とする電極構造体の製造方法。【選択図】なし