Pyrolysis of polyimide membranes from the same dianhydride monomer and different diamines to form carbon membranes

Polyimide-derived carbon nanofiber membranes as free-standing anodes for lithium-ion batteries

“…The third small peak near 289 eV is attributed to the sp 3 carbon. 44 It is well known that the atomic radius of the N is close to that of the C and the electronegativity of the N (3.04) is higher than that of the C (2.55). Therefore, the increase of nitrogen content is beneficial to the electrochemical performance.…”