LAUSR

Herein, we employed the lignin as sustainable carbon precursor with polyacrylonitrile (PAN) to synthesize the carbon nanofibers (CNFs), and coated the polyaniline (PANI) to acquire the high N -doped CNFs. The as-obtained lignin-derived nitrogen-doped polyacrylonitrile/polyaniline carbon nanofibers (LCNFs/PANI/N-9) displayed excellent properties, such as the large specific surface areas of 483.1 m 2 g −1 , uniform pore size distributions of 9.1 nm, high graphitic structure, and high nitrogen doping content of 6.31 wt%. The uniform diameter of CNFs could allow a short ion diffusion path with efficient electron transport. And the highest specific capacitance of the LCNFs/PANI/N-9 increased to 199.5 F g −1 at 1 A g −1 . Besides, the N -doped CNFs presented excellent cycling stability with 82% capacitance retention after 1000 charge-discharge cycles at the current density of 4 A g −1 . This research opened the new promising of high-value applications for inexpensive and renewable biomass.