Li-ion doped graphene/carbon nano fi ber porous architectures for electrochemical capacitive desalination

Large-scale Li-ion doped graphene/carbon nanofiber porous architectures were prepared by electrospinning homogeneous LiNO3/graphene oxide/polyacrylonitrile nanofibers, followed by carbonization at 900 °C. Capacitive de-ionization was measured in a dynamic mode. The architectures show excellent electrical adsorption, which is enhanced by the incorporation of LiC6 and graphene with a higher electro-adsorption capacity and a faster adsorption rate due to the large surface area (393.64 m2 g−1) and good conductivity. © 2015 Elsevier B.V. All rights reserved.

Li+/G/CNF architectures were fabricated by electrospinning homogeneous Li+/GO/PANF followed by carbonization at 900 °C. Large-scale and self-supporting porous architectures have a higher electroadsorption capacity and a faster adsorption rate showing excellent electrical adsorption (the maximum efficiency η = 84%), which is enhanced by the incorporation of Li-ion and graphene. A possible mechanism was proposed to explain the salt adsorption and charge storage in the Li+/G/CNF electrodes according to modified Donnan model of EDL theory. Acknowledgment This work was supported by National Natural Science Foundation of China (51302049), Natural Scientific Research Innovation Foundation in Harbin Institute of Technology (HIT.NSRIF.2015106) and Technology Development Program at Weihai (2013DXGJ12).