NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY

• Main Authors: HANAZAKI AKIRA, OCHIAI AKIHIRO, FUKUMOTO YUSUKE, TAKAHASHI KEIICHI
• Format: Patent
• Language: English; Japanese
• Published: 06.02.2020
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

To suppress heat generation during a short circuit while suppressing an increase in battery resistance.SOLUTION: A non-aqueous electrolyte secondary battery includes at least a positive electrode active material layer 12, an intermediate layer 40, a separator 30, a negative electrode active material layer 22, and an electrolyte. The intermediate layer 40 is disposed between the positive electrode active material layer 12 and the separator 30. The intermediate layer 40 includes a binder of 30% by mass or more and 95% by mass or less, and the remaining inorganic filler. The specific phosphazene compound is added to the electrolyte solution in an amount of 0.1% by mass or more and 3% by mass or less.SELECTED DRAWING: Figure 3 【課題】電池抵抗の増加を抑制しつつ、短絡時の発熱を抑制すること。【解決手段】非水電解液二次電池は正極活物質層１２、中間層４０、セパレータ３０、負極活物質層２２および電解液を少なくとも含む。中間層４０は正極活物質層１２とセパレータ３０との間に配置されている。中間層４０は、３０質量％以上９５質量％以下のバインダと、残部の無機フィラーとを含む。電解液に特定ホスファゼン化合物が０．１質量％以上３質量％以下添加されている。【選択図】図３