Heteroatom-Doped Carbon Spheres from FCC Slurry Oil as Anode Material for Lithium-Ion Battery

• 作者: Yang Guang Wang Dengke Chen Song Zhang Yue Fu Zijian Liu Wei
• 来源期刊: 中国炼油与石油化工（英文版）
• 年，卷（期）: 2022,（1）
• 所属期刊栏目: Scientific Research
• 页码范围: 1-10
• 页数: 10页
• 语种: 英文

摘要

A facile injected pyrolysis strategy to synthesize heteroatom-doped carbon spheres(CSs)with good conductivity is proposed by using the fluid catalytic cracking slurry oil(FCCSO)as the carbon source through a pyrolysis reaction process at 700-1000℃.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 effect of preparation conditions on the morphology and its electrochemical properties of CSs acting as the 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 LIBs,CSs show excellent electrochemical performance with a maximum reversible capacity of 365 mAh/g and an initial coulombic efficiency of 73.8％at a low current density of 50 mA/g.The CSs exhibit excellent cycling stability in a current range of 50 mA/g to 2 A/g,and still can maintain a stable reversible capacity of 347 mAh/g when the current is cycled back to 50 mA/g.This is mainly ascribed to the existence of suitable heteroatom content and unique spherical structure of CSs.The heteroatom-doped CSs can provide a new choice for the preparation of high efficiency anode materials for LIBs.