POSITIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY, POSITIVE ELECTRODE FOR LITHIUM SECONDARY BATTERY, AND LITHIUM SECONDARY BATTERY

To provide a positive electrode active material for a lithium secondary battery which can form a lithium secondary battery with a high cycle retention rate.SOLUTION: A positive electrode active material for a lithium secondary battery has a layered structure. A first average aspect ratio, which is t...

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Bibliographische Detailangaben
Hauptverfasser:	MATSUMOTO HIROKI, MATSUO SACHIFUMI, NAGAO DAISUKE
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	BASIC ELECTRIC ELEMENTS ELECTRICITY PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY
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Beschreibung
Zusammenfassung:	To provide a positive electrode active material for a lithium secondary battery which can form a lithium secondary battery with a high cycle retention rate.SOLUTION: A positive electrode active material for a lithium secondary battery has a layered structure. A first average aspect ratio, which is the aspect ratio of the positive electrode active material for a lithium secondary battery, is from 0.755 to 1.000 inclusive, and the average envelopment of the positive electrode active material for a lithium secondary battery is from 0.983 to 1.000 inclusive.SELECTED DRAWING: None 【課題】サイクル維持率の高いリチウム二次電池を得ることができるリチウム二次電池用正極活物質の提供。【解決手段】層状構造を有するリチウム二次電池用正極活物質であって、前記リチウム二次電池用正極活物質のアスペクト比である第１平均アスペクト比が０．７５５以上１．０００以下であり、前記リチウム二次電池用正極活物質の平均包絡度が０．９８３以上１．０００以下である、リチウム二次電池用正極活物質。【選択図】なし