Patent Number: 8,822,080

Title: Positive active material for lithium secondary battery, electrode for lithium secondary battery, and lithium secondary battery

Abstract: The present invention provides a Li.sub.3V.sub.2(PO.sub.4).sub.3-based positive active material for a lithium secondary battery, which has high discharge capacity and excellent storage performance, particularly high-temperature storage performance; and a lithium secondary battery made using the positive active material. The positive active material for a lithium secondary battery has general formula Li.sub.3V.sub.2(PO.sub.4).sub.3-x(BO.sub.3).sub.x (0<x.ltoreq.2.sup.-2). It is preferable that x be 2.sup.-7.ltoreq.x.ltoreq.2.sup.-3. Also provided are a positive electrode for a lithium secondary battery containing the positive active material; and a lithium secondary battery including the positive electrode.

Inventors: Fujino; Yukiko (Kyoto, JP), Yasunaga; Yoshinobu (Kyoto, JP), Tabuchi; Toru (Kyoto, JP), Inamasu; Tokuo (Kyoto, JP), Nukuda; Toshiyuki (Kyoto, JP)

Assignee: GS Yuasa International Ltd.

International Classification: H01M 4/58 (20100101)

Expiration Date: 9/02/12018