Free-standing Nitrogen-doped Graphene-carbon Nanofiberic Composite Mats: Electrospinning Synthesis and Application as Anode Material for Lithium-Ion Battery
Free-standing Nitrogen-doped Graphene-carbon Nanofiberic Composite Mats: Electrospinning Synthesis and Application as Anode Material for Lithium-Ion Battery
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自支撑氮掺杂石墨烯-碳纳米纤维复合材料：静电纺丝合成及其作为锂离子电池负极材料的应用
DOI：
10.1002/jctb.6114
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发表时间：
2019
影响因子：
3.4
通讯作者：
Yanfeng Yue
中科院分区：
文献类型：
--
作者：
Changsheng Shan;Yong Wang;Shuya Xie;Hong‐Yu Guan;Monica Argueta;Yanfeng Yue
石墨烯和碳纳米纤维具有优异的电子导电性、优异的柔韧性、高理论比容量、高比表面和化学耐久性，因此在锂离子电池（LIBs）中作为负极材料具有突出的优势。由石墨烯和碳纳米纤维组成的独立纳米复合垫，不含任何导电添加剂和粘合剂，可以提高lib的重量能量密度。结果采用简单的静电纺丝法对氧化石墨烯/聚丙烯腈（PAN - GO）纳米纤维复合毡进行高温热处理，制备了氮掺杂碳纤维-还原氧化石墨烯（NCNFs - rGO）毡。通过扫描电子显微镜、X射线衍射、拉曼光谱、X射线光电子能谱和作为锂离子电池阳极的电化学性能对所得到的独立的NCNFs - rGO垫进行了系统的表征。在没有任何导电添加剂和粘合剂的情况下，得到的独立的NCNFs - rGO垫直接用作锂离子电池的阳极材料。结论以NCNFs - rGO垫为阳极的锂离子电池由于结构完整和高导电性，具有高倍率性能和长周期稳定性。©2019化学工业协会
BACKGROUNDGraphene and carbon nanofibers have shown outstanding advantages as anode materials in lithium‐ion batteries (LIBs) because of their prominent electronic conductivity, outstanding flexibility, high theoretical specific capacity, high specific surface, and chemical durability. Free‐standing nanocomposite mats from graphene and carbon nanofibers, without any conductive additive and binder, could improve the weight energy density of the LIBs.RESULTSNitrogen‐doped carbon fiber‐reduced graphene oxide (NCNFs‐rGO) mats are fabricated by high‐temperature thermal treatment of graphene oxide/polyacrylonitrile (PAN‐GO) nanofiber composite mats via a simple electrospinning method. The resultant free‐standing NCNFs‐rGO mats which were systematically characterized by scanning electron microscopy, X‐ray diffraction, Raman spectroscopy, X‐ray photoelectron spectroscopy, and electrochemical properties as an anode for LIBs were also measured. Without any conductive additive and binder, the resultant free‐standing NCNFs‐rGO mats were directly used as an anode material in LIBs.CONCLUSIONThe LIBs with NCNFs‐rGO mats as anodes exhibited a high rate capability and long cycle stability owing to the structural integrity and highly electrical conductivity. © 2019 Society of Chemical Industry