LITHIUM ION BATTERY

• Main Authors: TAKAHAMA NOBUKO, KASAI TAKAKO
• Format: Patent
• Language: English; Japanese
• Published: 26.04.2018
• 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 a lithium ion battery containing a positive electrode material high in ratio of nickel and having a high energy density, which is high in safety and excellent in battery cycle life.SOLUTION: A lithium ion battery includes a positive electrode material having a composition formula: LiNiMnCoO, and a separator in which inorganic particles are supported on a nonwoven fabric substrate. In the positive electrode material, x+y+z=1 and x≥0.3 are satisfied. Aramid fibers are contained as constituent fibers of the nonwoven fabric substrate.SELECTED DRAWING: None 【課題】本発明の課題は、ニッケル比率の高い正極材料を含む、高エネルギー密度を有するリチウムイオン電池に関し、安全性が高く、電池のサイクル寿命に優れるリチウムイオン電池を提供することである。【解決手段】組成式ＬｉＮｉｘＭｎｙＣｏｚＯ２を有する正極材料と、不織布基材に無機粒子が担持されてなるセパレータを含むリチウムイオン電池であり、該正極材料においてｘ＋ｙ＋ｚ＝１且つ、ｘ≧０．３であり、且つ該不織布基材の構成繊維としてアラミド繊維を含むことを特徴とするリチウムイオン電池。【選択図】なし