Jiang, H., Huang, L., Wei, Y., Wang, B., Wu, H., Zhang, Y., Liu, H. and Dou, S. 2019. Bio-Derived Hierarchical Multicore–Shell Fe2N-Nanoparticle-Impregnated N-Doped Carbon Nanofiber Bundles: A Host Material for Lithium-/Potassium-Ion Storage. Nano-Micro Letters. 11, (Jul. 2019), 56. DOI:https://doi.org/10.1007/s40820-019-0290-0.