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Junke Ou,Lin Yang,Xianghui Xi 대한금속·재료학회 2017 ELECTRONIC MATERIALS LETTERS Vol.13 No.1
Horn comb, an abundant biomass waste, has been successfully converted intoa hierarchical porous nitrogen doped carbon (HPNDC) via a simple and costeffectiveapproach. Tested as anode for sodium ion batteries (SIBs), horncomb derived carbon shows good rate capability and cycling stability,delivering a high initial charge capacity of 400 mAh g−1 at 100 mA g−1,retaining a reversible capacity of 112 mAh g−1 at 5 A g−1, and exhibiting acapacity of 241 mAh g−1 at 100 mA g−1 after 100 cycles. These superiorelectrochemical performances can be ascribed to its unique hierarchical porestructure combined with appropriate nitrogen doping effects. We believe thatour works will be helpful in promoting the development of high-rate and lowcostsodium ion batteries for large-scale energy storage systems.