[Anode material]
The potential that is close the standard electrode potential of Li.
High energy density per volume & weight
Excellent cycle stability (Coulomb effeciency)
Have to endure rapid charging or discharging
Stability
.
.
.
[High Voltage]
[Pollution-Free]
[long cycle life]
[No Memory Effect]
[Safer than Lithium ion battery]
[lower internal resistivity]
[advantageous
lithium ions storage.
Prevent the graphite anode from expanding by lithium ion intercalation
Si has theoretical capacity of 4200mAh/g
Due to it’s large volume change, pulverization can be occurred.
Silicon has high-capacity but poor cycle stability
Carbon has low-capacity but good cycle stability
So silicon/carbon composites can have higher capacity than single carbon anode
Metal
Ex)Al, Cu.
Substrate
Power of Si device → Si
Ex) Si, Glass, Polymer
cf) Polymer substrate → Flexible
Recent R&D Trend
New component materials
Anode : Stability, Reversibility, Low expansion rate
High Melting Temp. of Li(180.6℃) are
needed
Electrolyte : Patent on LiPON
→Need Alternative Materials
Cathode : Direct connect with capacity
Fundamental structure is same as the general lithium polyer
battery . But some specific functional parts are to be reformed.
Functional improvement
Detailed shap have to be modified by experiment