ALL-SOLID TYPE SECONDARY BATTERY, ELECTRODE SHEET FOR ALL-SOLID TYPE SECONDARY BATTERY, AND MANUFACTURING METHOD OF ALL-SOLID TYPE SECONDARY BATTERY

• Main Authors: MAKINO MASAOMI, MIMURA TOMONORI, MEGURO KATSUHIKO, MOCHIZUKI HIROAKI
• Format: Patent
• Language: English; Japanese
• Published: 15.12.2016
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

PROBLEM TO BE SOLVED: To provide: an all-solid type secondary battery which enables the formation of a satisfactory interface between solid particles and the achievement of both of the enhancement in cycle characteristics and the increase in discharge capacity; an electrode sheet for an all-solid type secondary battery; and a method for manufacturing an all-solid type secondary battery.SOLUTION: An all-solid type secondary battery comprises: a positive electrode active material layer including a positive electrode active material; a solid electrolyte layer including a sulfide-based inorganic solid electrolyte having a property of conducting ions of metal belonging to Group I or II of the periodic table; a negative electrode active material layer including a negative electrode active material; and an intermediate layer including a compound expressed by a particular formula between the solid electrolyte layer and the negative electrode active material layer. In the all-solid type secondary battery, the content of a carbon element in the negative electrode active material layer is 20 mass% or more to all of solid components of the negative electrode active material layer; and at least one layer of the positive electrode active material layer, the negative electrode active material layer, and the solid electrolyte layer includes a particulate polymer. In addition, an electrode sheet for the all-solid type secondary battery, and a method for manufacturing the all-solid type secondary battery are provided.SELECTED DRAWING: Figure 1 【課題】固体粒子間に良好な界面を形成し、サイクル特性向上と放電容量の向上とを両立することができる全固体二次電池、全固体二次電池用電極シート、および全固体二次電池の製造方法を提供する。【解決手段】正極活物質を含む正極活物質層と、周期律表第１族または第２族に属する金属のイオンの伝導性を有する硫化物系無機固体電解質を含む固体電解質層と、負極活物質を含む負極活物質層と、固体電解質層と負極活物質層との間に、特定の式で表される化合物を含む中間層を有し、負極活物質層における炭素元素含有量が、負極活物質層の全固形成分に対し２０質量％以上であり、粒子状ポリマーを正極活物質層、負極活物質層および固体電解質層の少なくとも１層に含有する全固体二次電池、全固体二次電池用電極シート、および全固体二次電池の製造方法。【選択図】図１