I was made fef3 materials with n doped carbon and without n for sodium ion batteries but the performance of n doped sample always inferior than without n doped, not like in lithium ion case. I read someone‘s comment that nitrogen is too strong for sodium ion batteries and i need the reference for that explanation. Is somebody in here knowing the reference for explain why the nitrogen not good in sodium ion batteries?
Actually I'm using impregnation method in high temperature 800 degree C for made n doped carbon. from that, is there possibility that nitrogen will makes the surface area of the material become more bigger than without N, that's mean the material's size become more smaller and also the porous, and because of the bigger size of sodium ion so will makes sodium insertion more hardly in N doped samples compare to without n doping.
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