ELECTRODE STRUCTURE, SECONDARY BATTERY, BATTERY PACK, VEHICLE, AND STATIONARY POWER SUPPLY

• Main Authors: MATSUNO SHINSUKE, HOTTA YASUYUKI, KUBOKI TAKASHI
• Format: Patent
• Language: English; Japanese
• Published: 24.03.2023
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

To provide an electrode structure capable of achieving a secondary battery that shows a high charge-and-discharge efficiency and is suppressed in self discharge, a secondary battery and a battery pack, and a vehicle and a stationary power supply which include the battery pack.SOLUTION: According to an embodiment, an electrode structure includes a negative electrode including a negative electrode active material-containing layer, and a separator including at least three layers of a first composite layer, a porous layer and a second composite layer in the order. The negative electrode active material-containing layer and the first composite layer are in contact with each other, the first composite layer and the second composite layer contain solid particles and a polymer material, and a relationship of 1.35≤FH/FV≤2.2 is satisfied, when FH represents force applied in a horizontal direction and FV represents force applied in a vertical direction, the forces being obtained in measurement of an interface between the negative electrode active material-containing layer and the first composite layer by interfacial cutting evaluation.SELECTED DRAWING: Figure 1 【課題】高い充放電効率を示すとともに自己放電が抑制された二次電池を実現できる電極構造体、二次電池及び電池パック、並びに、当該電池パックを備えた車両及び定置用電源を提供すること。【解決手段】実施形態によれば、電極構造体は負極活物質含有層を備える負極と、第１複合層、多孔質層及び第２複合層の少なくとも３層をこの順で備えるセパレータと、を備え、負極活物質含有層と第１複合層は接し、第１複合層及び第２複合層は固体粒子及び高分子材料を含み、負極活物質含有層と第１複合層の界面を界面切削評価により計測したときの水平方向にかかる力ＦＨと垂直方向にかかる力ＦＶの関係が１．３５≦ＦＨ／ＦＶ≦２．２である。【選択図】図１