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. A...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）.展开更多
Ginkgo leave, a naturally abundant resource, has been successfully employed as the raw material to prepare ni- trogen doped porous carbon （NDPC） materials. The preparation of the porous carbon does not involve assis...Ginkgo leave, a naturally abundant resource, has been successfully employed as the raw material to prepare ni- trogen doped porous carbon （NDPC） materials. The preparation of the porous carbon does not involve assistance of any activation or template technique. The as-obtained NDPC shows favorable features for electrochemical energy storage, which can not only provide multiple sites for the storage and insertion of Li ions, but also facilitate rapid mass transport of electrons and Li ions. As a result, the NDPC when evaluated as an anode material for lithium ion batteries delivers high reversible capacity （505 mAh·g-1 at 0.1 C）, excellent rate capability （190 mAh·g-1 at 10 C）. These favorable properties suggest that the NDPC can be a promising anode material for lithium ion batteries （LIBs）.展开更多
基金We greatly appreciate the Natural Science Foundation of China （No. 21275104） for supporting this work.
文摘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）.
文摘Ginkgo leave, a naturally abundant resource, has been successfully employed as the raw material to prepare ni- trogen doped porous carbon （NDPC） materials. The preparation of the porous carbon does not involve assistance of any activation or template technique. The as-obtained NDPC shows favorable features for electrochemical energy storage, which can not only provide multiple sites for the storage and insertion of Li ions, but also facilitate rapid mass transport of electrons and Li ions. As a result, the NDPC when evaluated as an anode material for lithium ion batteries delivers high reversible capacity （505 mAh·g-1 at 0.1 C）, excellent rate capability （190 mAh·g-1 at 10 C）. These favorable properties suggest that the NDPC can be a promising anode material for lithium ion batteries （LIBs）.
