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Electrochemical performance of all-solid-state lithium secondary batteries using Li4Ti5O12 electrode and Li2S–P2S5 solid electrolytes

Published online by Cambridge University Press:  31 January 2011

Hirokazu Kitaura ,
Akitoshi Hayashi ,
Kiyoharu Tadanaga  and
Masahiro Tatsumisago
Masahiro Tatsumisago
Affiliation:
Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, Naka-ku, Sakai, Osaka 599-8531, Japan
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Abstract

All-solid-state Li–In/Li4Ti5O12 cells using Li2S–P2S5 solid electrolytes were assembled to investigate their electrochemical properties in the wide voltage range of 0–3 V (versus Li). The Li/Li4Ti5O12 cells using 1 M LiPF6 in ethylene carbonate and diethyl carbonate were fabricated for comparison with the all-solid-state cells. The capacity of the all-solid-state cell using the 70Li2S·27P2S5·3P2O5 (mol%) solid electrolyte decreased with an increase in the current density as well as the cell using the liquid electrolyte. However, the all-solid-state cell was charged and discharged even at a high current density of 10 mA/cm2. The all-solid-state cell was cycled at 1.3 mA/cm2 and retained 90% of the first reversible capacity of about 120 mAh/g after 500 cycles. The all-solid-state cell cycling at 100 °C showed the small overpotential and reversible capacity of about 120 mAh/g at 13 mA/cm2.

Keywords

Ionic conductorEnergy storageLi
Type
Articles
Information
Journal of Materials Research , Volume 25 , Issue 8: Materials for Electrical Energy Storage , August 2010 , pp. 1548 - 1553
Copyright
Copyright © Materials Research Society 2010

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