Fabrication of Porous Nitrogen‐Doped Carbon Materials as Anodes for High‐Performance Lithium Ion Batteries

The hierarchical porous nitrogen‐doped carbon materials (HNCs) were prepared by using nitrogen containing gelatin as the carbon source and nano‐silica obtained by a simple flame synthesis approach as the template. All of the as‐obtained HNCs show much higher Li storage capacity as compared with commercial graphite. Specifically, HNC‐700 with biggest micropore volume and highest nitrogen content exhibited optimal reversible capacities of 1084 mAh·g−−1 at the current density of 37.2 mA·g−1 (0.1 C) and 309 mAh·g−1 even at 3.72 A·g−1 (10 C). This result suggests that HNCs should be a promising candidate for anode materials in high‐rate lithium ion batteries (LIBs).