Nitrogen/sulfur co-doped hollow carbon nanofiber anode obtained from polypyrrole with enhanced electrochemical performance for Na-ion batteries  

作　　者：Zhigao Luo Sainan Liu Yangshen Cai Shi Li Anqiang Pan Shuquan Liang 

机构地区：[1]School of Materials Science and Engineering, Central South University [2]Key Laboratory of Nonferrous Metal Materials Science and Engineering, Ministry of Education, Central South University

出　　处：《Science Bulletin》2018年第2期126-132,共7页科学通报（英文版）

基　　金：supported by the National Natural Science Foundation of China (51374255 and 51302323);Program for New Century Excellent Talents in University (NCET-13-0594);Research Fund for the Doctoral Program of Higher Education of China (201301621200);the Natural Science Foundation of Hunan Province, China (14JJ3018);the Exploration and Innovation Foundation of CSU for Postgraduate (502200568)

摘　　要：Polypyrrole and sulfur derived hollow carbon nanofibers co-doped with nitrogen/sulfur are synthesized and applied as the anode for Na-ion batteries(NIBs). Successful doping of hollow carbon nanofiber with nitrogen and sulfur is confirmed by X-ray photoelectron spectroscopy, scanning and tunneling electron microscopy. Further analysis certifies that sulfur doping has a significant impact in improving the elecctrochemical performance of the carbon-based anodes for NIBs. The obtained N-doped hollow carbon nanofiber and N/S co-doped hollow carbon nanofiber exhibit similar morphologies but different electrochemical behavior. As expected, the N/S co-doped hollow carbon nanofiber anode exhibits enhanced electrochemical performance, including high specific capacity, outstanding long-term stability, and good rate stability.Polypyrrole and sulfur derived hollow carbon nanofibers co-doped with nitrogen/sulfur are synthesized and applied as the anode for Na-ion batteries （NIBs）. Successful doping of hollow carbon nanofiber with nitrogen and sulfur is confirmed by X-ray photoelectron spectroscopy, scanning and tunneling electron microscopy. Further analysis certifies that sulfur doping has a significant impact in improving the elecctrochemical performance of the carbon-based anodes for NIBs. The obtained N-doped hollow carbon nanofiber and N/S co-doped hollow carbon nanofiber exhibit similar morphologies but different electrochemical behavior. As expected, the N/S co-doped hollow carbon nanofiber anode exhibits enhanced elec- trochemical performance, including high specific capacity, outstanding long-term stability, and good rate stability.

关 键 词：Hollow carbon nanofibersNitrogen/sulfur co-doping Anode Sodium ion batteries 

分 类 号：O646[理学—物理化学] TM912[理学—化学]