Jiang, H.; Huang, L.; Wei, Y.; Wang, B.; Wu, H.; Zhang, Y.; Liu, H.; Dou, S. Bio-Derived Hierarchical Multicore–Shell Fe2N-Nanoparticle-Impregnated N-Doped Carbon Nanofiber Bundles: A Host Material for Lithium-/Potassium-Ion Storage. Nano-Micro Lett 2019, 11, 56.