Core-sheath structured porous carbon nanofiber composite anode material derived from bacterial cellulose/polypyrrole as an anode for sodium-ion batteries

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• 作者：Zhian Zhang ; ^{zza75@163.com" class="auth_mail" title="E-mail the corresponding author} ; Juan Zhang ; Xingxing Zhao ; Fuhua Yang
• 关键词：Sodium-ion batteries ; Carbon nanofiber ; Bacterial cellulose ; Nitrogen-doped porous carbon
• 刊名：Carbon
• 出版年：2015
• 出版时间：December 2015
• 年：2015
• 卷：95
• 期：Complete
• 页码：552-559
• 全文大小：2467 K

文摘

A core-sheath structured carbon nanofiber@nitrogen-doped porous carbon (CNF@NPC) composite is synthesized as a promising anode material for sodium-ion batteries (SIBs). Particularly, the eco-friendly bacterial cellulose (BC) is used as both template and precursor for the synthesis of CNF@NPC through the carbonization of bacterial cellulose@polypyrrole (BC@PPy). Due to the particular core-sheath structure and the synergetic effect between the CNF core layer and the NPC outer layer, the CNF@NPC exhibit outstanding electrochemical performance, including a high reversible specific capacity (240 mAh g⁻¹ at 100 mA g⁻¹ over 100 cycles), excellent rate performance (146.5 mAh g⁻¹ at 1000 mA g⁻¹), and superior cycling stability (148.8 mAh g⁻¹ at 500 mA g⁻¹ over 400 cycles). The application of environmentally friendly electrode material may open a new situation for SIBs.