LITHIUM-IRON-MANGANESE-BASED COMPOSITE ACTIVE MATERIAL STRUCTURE, LITHIUM ION SECONDARY BATTERY USING THE SAME, AND MANUFACTURING METHOD

• Main Authors: KONO NAOKI, TAMURA NOBUYUKI, CHENG QIAN
• Format: Patent
• Language: English; Japanese
• Published: 21.09.2017
• 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-iron-manganese-based composite active material structure achieving a lithium ion secondary battery exhibiting high output characteristics.SOLUTION: The present invention provides a lithium-iron-manganese-based composite active material structure where at least a part of a surface of lithium-iron-manganese-based composite oxide is coated with a covering oxide layer and a carbon material layer and both the covering oxide layer and the carbon material layer are in contact with the surface of lithium-iron-manganese-based composite oxide.SELECTED DRAWING: Figure 1 【課題】高い出力特性を示すリチウムイオン二次電池を実現するリチウム鉄マンガン系複合酸化物構造を提供する。【解決手段】本発明は、リチウム鉄マンガン系複合酸化物の表面の少なくとも一部に、被覆酸化物層と、炭素材層とにより被覆され、前記被覆酸化物層と前記炭素材層とが共に前記リチウム鉄マンガン系複合酸化物表面に接触していることを特徴とするリチウム鉄マンガン系複合活物質構造、である。【選択図】 図１