新型炭材料2021，Vol.36Issue(3)：606-615,10.DOI:10.1016/S1872-5805(21)60032-X
基于PAN前驱体不同热处理温度制备NCFs及在锂硫电池中的电化学行为
The electrochemical behavior of nitrogen-doped carbon nanofibers derived from a polyacrylonitrile precursor in lithium sulfur batteries
摘要
Abstract
A 3D assembly of nitrogen-doped carbon nanofibers (NCFs) derived from polyacrylonitrile was synthesized by a com-bined electrospinning/carbonization technique and was used as the positive current collector in lithium sulfur (Li-S) batteries contain-ing a Li2S6 catholyte solution. The physical and electrochemical behavior of the NCFs were investigated and it was found that their electrochemical performances depended on the pyrolysis temperature. Of the samples carbonized at 800, 900 and 1000 °C, those car-bonized at 900 °C performed best, and delivered a reversible capacity of 875 mAh?g-1 at a high sulfur loading of 4.19 mg?cm2 and re-tained at 707 mAh?g-1 after 250 cycles at 0.2 C. The coulombic efficiency of the NCF-900@Li2S6 electrode was almost 98.55％ over the entire cycle life. In addition, the capacity retention of the electrode reached 81.53％ even at a high current density of 1 C for over 150 cycles. It was found that the NCFs carbonized at 900 °C had the highest electrical conductivity, which might be the dominant factor that determined its performance for use as a positive current collector.关键词
聚丙烯腈/氮掺杂炭纳米纤维/热解温度/电化学行为Key words
Polyacrylonitrile/NCFs/Pyrolysis temperatures/Electrochemical behaviors分类
化学化工引用本文复制引用
姚山山,何燕苹,Arslan Majeed,张翠娟,沈湘黔,黎天保,覃事彪..基于PAN前驱体不同热处理温度制备NCFs及在锂硫电池中的电化学行为[J].新型炭材料,2021,36(3):606-615,10.基金项目
Financial support from National Natural Sci-ence Foundation of China(51874146),China Postdoctoral Science Foundation(2018T110551 and 2017M621640),Six Talent Peaks Project of Jiangsu Province(XCL-125),Start-up Foundation of Jiangsu University for Senior Talents(15JDG014)are grate-fully acknowledged. 国家自然科学基金项目(51874146) （51874146）
中国博士后科学基金特别资助项目(2018T110551) （2018T110551）
中国博士后科学基金项目(2017M621640) （2017M621640）
江苏省"六大人才高峰"高层次人才项目(XCL-125) （XCL-125）
江苏大学人才启动基金项目(15JDG014). （15JDG014）
