Published 17 August 2010,Electrochemical properties of (LLZ) were investigated to reveal its availability as a solid electrolyte for all-solid-state rechargeable batteries with a Li metal anode. After calcination at
, a well-sintered LLZ pellet with a garnet-like structure was obtained, and its conductivity was
at room temperature. The cyclic voltammogram of the Li/LLZ/Li cell showed that the dissolution and deposition reactions of lithium occurred reversibly without any reaction with LLZ. This indicates that a Li metal anode can be applied for an LLZ system. A full cell composed of a
configuration was also operated successfully at expected voltage estimated from the redox potential of Li metal and
. Simultaneously, an irreversible behavior was observed at the first discharge and charge cycle due to an interfacial problem between
and LLZ. The discharge capacity of the full cell was
. These results reveal that LLZ is available for all-solid-state lithium batteries.
Author notes
3 Electrochemical Society Active Member.
4 E-mail: masakoto@tmu.ac.jp
Dates
- Received 21 April 2010
- Revised 2 July 2010
- Published 17 August 2010