unlike metal oxide layered and spinel oxide electrodes, why olivine structure does not show any oxygen decomposition behavior?
Maybe you can find some information from the following papers:
Inorganics 2014, 2, 132-154; doi:10.3390/inorganics2020132
Comparative Issues of Cathode Materials for Li-Ion Batteries
Chin. Phys. B Vol. 25, No. 1 (2016) 017801
Electrochromic & magnetic properties of electrode materials for lithium ion batteries
Hello Sir,
I have read in a literature, that the layered structures like LiCoO2 have some safety concerns like Evolution of oxygen during overcharge when used as cathode in batteries. But the Olivine structures like FePO4 does not have such effects and they are considered to be one of the safest cathode materials for lithium ion batteries. Is it because of potential stability or because of its structure? I am student and I would like to apologize if my question sounds silly.
Mr.Raam,
The layered oxide cathode materials like (LiCoO2) are structurally unstable when you take lithium above 0.5 mole from the lattice. and if you see the electronic structure of LiCoO2, the transition metal 3d orbital are overlapped with the oxygen 2p orbital, when you take more lithium from the structure oxygen also will evolve from the lattice because of overlapping. due to this oxygen evolution from the cathode materials will side react with the electrolyte which leads to explosive on lithium ion batteries. where as olive phosphate which is having strong covalent bonding of Phosphate (PO4)3- due to that it has high thermal stability.
you go through these links
http://pubs.rsc.org/en/content/articlehtml/2008/EE/B811802G
http://www.nature.com/articles/nnano.2016.207?WT.feed_name=subjects_biotechnology
- Badges
- Science topic
- Similar topics
- Engineering
- Electrical Engineering
- Electrodes