中国炼油与石油化工 ›› 2022, Vol. 24 ›› Issue (1): 1-10.

• Scientific Research •    下一篇

催化油浆基杂原子掺杂碳球在锂离子电池阳极材料中的应用

杨光1,Dengke Wang2,Song Chen3,张玥3,符子剑4,Wei Liu3   

  1. 1. 黑龙江省能源环境研究院
    2. 北京化工大学
    3. Energy&Environmental Research Institute of Heilongjiang Province
    4. 哈尔滨工业大学
  • 收稿日期:2021-08-30 修回日期:2021-09-19 出版日期:2022-03-30 发布日期:2022-03-30
  • 通讯作者: 杨光 E-mail:18545535486@163.com
  • 基金资助:
    黑龙江省院所基本应用技术研究专项基金

Heteroatom-doped carbon Spheres from Fluidized Catalytic Cracking Slurry Oil as anode material for lithium-ion battery

  • Received:2021-08-30 Revised:2021-09-19 Online:2022-03-30 Published:2022-03-30

摘要: 本研究以催化油浆为碳源,采用注入热解法在700-1000℃条件下制备具有良好导电性的杂原子掺杂碳球(CSs)。利用扫描电子显微镜(SEM)、透射电子显微镜(TEM)、X射线衍射(XRD)、拉曼光谱、红外光谱(FT-IR)和X射线光电子能谱(XPS)对材料的结构进行表征。探讨了反应条件对CSs形貌的影响并研究了其作为锂离子电池(LIBs)阳极材料的电化学性能。研究结果表明,杂原子掺杂碳球主要含有C、N、O、S四种元素。随着热解温度的升高,CSs粒径减小但石墨化程度提高。作为锂离子电池阳极材料,在50 mA·g-1的电流密度下,CSs具有365 mAh·g-1的比容量及73.8%的初始库仑效率。在50 mA·g-1到 2 A·g-1的电流范围内CSs具有良好的性能,当电流循环回50 mA·g-1时,CSs仍保持347 mAh·g-1的稳定可逆容量。这主要归因于CSs具有合适的杂原子含量和独特的球形结构。这种杂原子掺杂CSs为制备高效锂离子电池阳极材料提供了一种新的选择。

关键词: 油浆, 碳球, 锂离子电池, 电化学性能

Abstract: A facile injected pyrolysis strategy to synthesize heteroatom-doped carbon spheres (CSs) with good conductivity is proposed by only using fluidized catalytic cracking slurry oil (FCCSO) as carbon source through a pyrolysis reaction process at 700-1000°C. The structures of CSs are characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), Raman spectroscopy, Fourier transform infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS). The influence of preparation conditions on the morphology of CSs and its electrochemical properties as anode material for Lithium-ion battery (LIBs) are investigated. The XPS measurement results show that the CSs mainly contain C, N, O and S elements. With the increase of pyrolysis temperature, the particle size of CSs decreases but the graphitization degree of CSs increases. As the anode material for lithium-ion batteries (LIBs), CSs shows excellent electrochemical performance with a high maximum reversible capacity of 365 mAh·g-1 and an initial coulombic efficiency of 73.8% at a low current density of 50 mA·g-1. CSs exhibits excellent cycling stability in the current range of 50 mA·g-1 to 2 A·g-1 and still maintains a stable reversible capacity of 347 mAh·g-1 when the current is cycled back to 50 mA·g-1. This is mainly due to the existence of suitable heteroatom content and unique spherical structure of CSs. The heteroatom-doped CSs provides a new choice for the preparation of high efficiency anode materials for LIBs.