1. 이 론
(1) Energy harvesting
"Energy harvesting-에너지 하베스팅“은 ”Power Harvesting" 또는 “Energy Scavenging"과 같은 뜻으로 사용되는 것으로, ”자연의 버려지는 에너지를 수확하여 저장하는 기술“을 의미하며, 무선센서네트워크의 소형 독립전원을 제작하는데 많이 연구되고 있다. 에너지 하베스팅에 관한
Na/NaxC6
New anode material made of carbons, (NaxC6). There is the average voltage on the low potential plateau ( higher on the Na cells than the Li cells ).
NaV1−xCrxPO4F
retain more energy
Na2FePO4F
mixture with Li2FePO4F
Cathode electrode Anode electrode Electrolyte Cell volt Energy Density
(Wh/kg)
NiMH
Battery Nickel oxide
(ex. NiO2H) Hydrogen occlusion alloy G
Structure of Thin film batteries
Encapsulation
Direct connect with battery’s stability
Protection the anode from exterior
Ex) Parlylene, Cr, V
Anode
Desorbs electrons as discharging
Ex) Li, SnO2, C
Electrolyte
High density of charge carrier
High density of vacancy & interstitial site
Low activation Energy of hopping
Cathode
Absorb electrons as discharging
Direct connect w
2.2 Indirect threat
According to the PEST analysis, it is possible to divide into direct threat and indirect threats. Through analyzing the threats, finding out the critical threat then establishing an action plan to deal with the critical threat will be concluded.
1) Requiring substitute for oil
As many developed countries used huge amounts of oil when stepping into better life, skyrocke
[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