From the papers what I have read most people simply say that the capacitance increased with N doping. Main reason could be increased wettability (Depends on What type of N doped to Carbon). But what is the accurate explanation in electrochemistry for this? Graphene or CNT is SP2 hybridised, so has a lone P electron. But for N all the P orbitals are half full and quite stable. What is the actual reason for the increase in capacitance?
Thanks
Better performances may also be related to the increase of electronic conductivity (as N-doping favourably modifies the electronic structure of carbon) and also to the occurrence of pseudo-capacitance. Faradaic processes occurring with N-moeties that easily oxidise and reduce, indeed increase the capacitance because of such additional contribution. You can see some examples of reactions in the attached file.
Alain
Alain Celzard,
Thanks, I like the equations in the doc!
What about O doping? I mean O doping with SP2 Carbon can donate one pi electron to the P orbital. So the conductivity increases. What redox reaction would occur?
Looking into this, can I conclude that N doping causes more conductivity than O? Because- incase of Pyrolic N we would have 2 pi electrons.
Thanks
Thanks Alain!
So what are the best variations to have. Is it Pyrolic(as we have 2 electrons) and the Quinone? Can we conclude something based on the number of electrons?
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