Hello Saman! I guess not just Nitrogen! since in case of carbonate solvents as well ! it forms a SEI or film on the surface of the electrodes like (graphite) . so C-C bond is to strong to degrade by comparing to C-Hetroatom right? So C-N or C-F or C-O , can degrade at high potential and form radicals and polymerize to form a film !
It depends on the working potential of the electrodes and on the nature of the electrolytes! in case of aqueous electrolytes based on H2SO4 or KOH or HF coupled with Pt , Zn, Ni . there are no organic molecules that can decompose to form this film so you have just emission of gases ! and also if you look on the electrode nature there is no need to form this layer for the function of the electrode. Since in case of graphite it is crucial to form SEI from organic carbonate and Li F ..... for more info check this paper about aqueous electrolyte it could be useful ''Rechargeable batteries with aqueous electrolytes ''(Fritz Beck, Paul Rüetschi)....