에너지저장시스템(이하 ESS, Energy Storage System)은 생산된 전력을 발전소, 변전소 및 송전선 등을 포함한 각각의 연계 시스템에 저장 후, 전력이 필요한시기에 선택적?효율 적 사용을 통해 에너지 효율을 극대화 시키는 시스템임
야간에 유휴전력을 저장하고 전력소모가 심한 주간에 저장된 전력을 사용함
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
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
[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
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[High Voltage]
[Pollution-Free]
[long cycle life]
[No Memory Effect]
[Safer than Lithium ion battery]
[lower internal resistivity]
[advantageous