V2O5 cathode for high-performance all-solid-state thin film battery
- V2O5 cathode for high-performance all-solid-state thin film battery
- 김주선; 문주호; 신현정; 남경덕
- Issue Date
- , 99-99
- Since the thin film batteries withLiCoO2 cathodes have been proposed
by research group at Oak Ridge National Laboratory, wide variety
of investigations and applications were addressed by many others.
The main application fields of thin film battery are directed to the
specialized energy sources for the MEMS device, pacemaker, and
military applications. Although their superior characteristics such as
leakage free and little self-discharge, thin film battery has limited application
span because their low specific capacity at high rate of discharge
condition. The main challenge is, therefore, to develop all
solid state thin film battery with high performances especially at fast
charge/discharge condition. Glancing angle deposition (GLAD),
sputtering at off-set position between target and substrate used to
modulate the columnar growth direction of amorphous V2O5 cathode.
By decreasing the working pressure the inclination angle of
V2O5 columns was decreased and their resultant specific capacity at
high rate of discharge condition was enhanced. Furthermore, by
adding substrate rotation technique to the GLAD, we finally report
the high-performance V2O5 cathode thin films especially endurable
to the fast discharging condition. By comparing with the conventional
thin film, the developed cathode shows more than order magnitude
higher capacity retention which is correspond to the value of
adaptation to application.
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