High-rate performance of all-solid-state lithium secondary batteries using Li4Ti5O12 electrode

✍ Scribed by Hirokazu Kitaura; Akitoshi Hayashi; Kiyoharu Tadanaga; Masahiro Tatsumisago

• Publisher: Elsevier Science
• Year: 2009
• Tongue: English
• Weight: 516 KB
• Volume: 189
• Category: Article
• ISSN: 0378-7753
• DOI: 10.1016/j.jpowsour.2008.10.005

✦ Synopsis

The all-solid-state Li-In/Li 4 Ti 5 O 12 cell using the 80Li 2 S•20P 2 S 5 (mol%) solid electrolyte was assembled to investigate rate performances. It was difficult to obtain the stable performance at the charge current density of 3.8 mA cm -2 in the all-solid-state cell. In order to improve the rate performance, the pulverized Li 4 Ti 5 O 12 particles were applied to the all-solid-state cell, which retained the reversible capacity of about 90 mAh g -1 at 3.8 mA cm -2 . The 70Li 2 S•27P 2 S 5 •3P 2 O 5 glass-ceramic, which exhibits the higher lithium ion conductivity than the 80Li 2 S•20P 2 S 5 solid electrolyte, was also used. The Li-In/70Li 2 S•27P 2 S 5 •3P 2 O 5 glass-ceramic/pulverized Li 4 Ti 5 O 12 cell was charged at a current density higher than 3.8 mA cm -2 and showed the reversible capacity of about 30 mAh g -1 even at 10 mA cm -2 at room temperature.