COMPOSITE MATERIAL, METHOD FOR PRODUCING THE SAME, AND NEGATIVE ELECTRODE MATERIAL FOR LITHIUM ION SECONDARY BATTERY

To provide a composite material usable as a negative electrode material of a lithium ion secondary battery.SOLUTION: The composite material includes a carbonaceous material and a metal oxide layer covering the surface of the carbonaceous material. The coverage of the metal oxide layer is 95% or more...

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Bibliographische Detailangaben
Hauptverfasser:	BACK JIN SOK, KONO DAISUKE, INOUE HIROFUMI, TONEGAWA AKIO
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	BASIC ELECTRIC ELEMENTS CHEMISTRY COMPOUNDS THEREOF ELECTRICITY INORGANIC CHEMISTRY METALLURGY NON-METALLIC ELEMENTS PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
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Beschreibung
Zusammenfassung:	To provide a composite material usable as a negative electrode material of a lithium ion secondary battery.SOLUTION: The composite material includes a carbonaceous material and a metal oxide layer covering the surface of the carbonaceous material. The coverage of the metal oxide layer is 95% or more, and the average thickness of the metal oxide layer is 10 nm or less. A ground layer for the metal oxide layer is preferably provided at least partially between the carbonaceous material and the metal oxide layer. An amorphous carbon layer, a graphene layer, a polymer layer or the like can be used as the ground layer.SELECTED DRAWING: Figure 2 【課題】リチウムイオン二次電池の負極材として利用可能な複合材料の提供。【解決手段】炭素性材料と、前記炭素性材料の表面を被覆する金属酸化物層とを含む複合材料であって、前記金属酸化物層の被覆率が９５％以上、平均厚さが１０ｎｍ以下である複合材料。前記炭素性材料と金属酸化物層との間の少なくとも一部に金属酸化物層のための下地層を備えることが好ましい。下地層としては非晶質炭素層、グラフェン層またはポリマー層などが用いることできる、【選択図】図２