electrodes with different potentials
charge transfer properties
investigating transition metal oxides
specific morphologies
nanostructured materials
→ the charge storage from faradaic processes occurring at the surface of the material
→ the pseudo-capacitive effect, becomes increasingly important
mesostructured materials
→ enhanced oxidation and reduction kinetics
→ the relativ
additional redox mediators, enzymes, which exibit redox properities and are able to directly exchange electrons with conducting materials, are applied.
Hemoproteins usually are able to exchange electrons directly with electrode.
Electron transfer proteins
ex. Cytochrome-c, oxidoreductase,
ferrocytochrome-c, O2 oxidoreductase …
Graphite
Stacked graphene layers, crystalline.
0.335 nm spacing betwwen planes.
About 10% volume expansion upon
Li intercalaion
Theoretical maximum capacity is
372mAl/g(LiC6)
Coating by Conductive Materials
The major effects and advantages
No classical binder is required to prepare mechanically and electrochemically stable anodes.
Irreversible capacity in the first cycle
리튬이온전지는 음극재, 양극재, 분리막, 전해액 등 4개의 핵심소재로 구성되어 있고, 이 핵심소재들이 반응하여 에너지를 저장하고 방출합니다.
양극재는 전기가 들어오면 리튬이온을 통해 전하를 실어 나르는 역할을 하고, 음극재는 이동해 온 리튬이온과 전하를 저장하였다가 방출하는 역할을 담당
What is Amorphous metal?
Polycrystalline grains of varying shapes and sizes
Misaligned planes of atoms slip past each other easily, absorbing energy and allowing dislocations to move, making deformation permanent.
Grain boundaries represent weak spots
Also called Metallic glasses or glassy metals
Cooled faster than atoms can rearrange into a crystal.
Dislocation movement obstructed s