Carbon nanofibers/nanosheets hybrid derived from cornstalks as a sustainable anode for Li-ion batteriesElectronic supplementary information (ESI) available: Experimental details, SEM, XRD, TEM, HRTEM, and electrochemical characterization. See DOI: 10.1039/c5ta00050e

A porous carbon nanofibers/nanosheets hybrid (CNFS) is converted from cornstalk waste by a simple treatment. The resulting material displays a superhigh surface area and rich porosity. Benefiting from unique structural features, the evolved CNFS possesses an ultrahigh rate capability of 454 mA h g −1 at 3 A g −1 . A porous carbon nanofibers/nanosheets hybrid (CNFS) is converted from cornstalk waste, and displays a superhigh surface area and rich porosity. Benefiting from unique structural features, the evolved CNFS possesses an ultrahigh rate capability of 454 mA h g −1 at 3 A g −1 .