High rate capabilities of all-solid-state lithium secondary batteries using Li4Ti5O12-coated LiNi0.8Co0.15Al0.05O2 and a sulfide-based solid electrolyte

✍ Scribed by Yoshikatsu Seino; Tsuyoshi Ota; Kazunori Takada

• Publisher: Elsevier Science
• Year: 2011
• Tongue: English
• Weight: 766 KB
• Volume: 196
• Category: Article
• ISSN: 0378-7753
• DOI: 10.1016/j.jpowsour.2011.03.090

✦ Synopsis

Rate capability of LiNi 0.8 Co 0.15 Al 0.05 O 2 in solid-state cells was investigated with 70Li 2 S-30P 2 S 5 glassceramics as a sulfide solid electrolyte. It showed higher rate capability than LiCoO 2 ; discharge capacity observed at a current density of 10 mA cm -2 was ca. 70 mAh g -1 . Surface coating with Li 4 Ti 5 O 12 onto the LiNi 0.8 Co 0.15 Al 0.05 O 2 particles further improved the high-rate performance to give ca. 110 mAh g -1 . The rate capability promises to realize all-solid-state lithium secondary batteries with very high performance.