Abb. For Polyvinylidene fluoride.
high purity polymers, particularly well suited to a number of fuel cell applications, including :
proton exchange membranes
conductive bipolar flow plates
cell plate coatings
Polymer behave like molecular sieves in the solid state
Internal surface area is wide
Pore size can be controlled up to nano-scale
Organic polymer is good one to be PIMs
Op
Single crystalline SI solar cell
single -> wood [lumber]
Poly -> veneer board
High efficiency,
no matter where work
Due to indirect band gap,
optical absortion rate is very low
Single crystalline solar cell
Single crystalline
Classification Single crystalline
Degree of purity high
Defect density low
Efficiency High
Maximum limi
Li-ion is the best power storage we get
- Good : Light weight, High capacity,
Low self-discharge
- Bad : Safety, Aging, Deep discharging
1. What is Micro Fuel Cell (MFC)?
2. MFC’s Advantage
3. Kind of MFC
4. Compare MFC
5. MFC’s Now & Future
♣ Fuel Cells?
Electrochemical cell that converts a source fuel into an electrical current.
Fuel Cell has strength in..
1. Hig
cell의 배양물로부터 total DNA를 준비하는 방법은 4단계로 나눌 수 있다. 가장 먼저 bacterial cell 배양물의 증식 및 수확을 한다. 이 방법은 bacteria를 배양한 뒤 centrifugation을 통해 cell의 pallet을 분리한다. 다음으로는 세포 추출물을 분리하는 단계인데 cell의 구성성분 중 필요 없는 부분을 부수어서 open시킨다.
features1.
fuel cell is a kind of generator that provides electricity, batteries are like warehouses that store electricity.
features2.
The maximum output energy from the battery
= 50% forms of energy+50% heat
=>The energy efficiency is 50%.
features3.
large energy density.
(store a lot of energy per weight)
Recently, as the amount of storage for capacito