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      https://www.ias.ac.in/article/fulltext/boms/034/07/1707-1714

    • Keywords

       

      Hollow carbon spheres; heat treatment; gas pressure; lithium ion battery.

    • Abstract

       

      Heat treatment was carried out between 800 and 1200°C to investigate its effects on the microstructure and electrochemical properties of the hollow carbon spheres (HCSs) prepared in high-pressure argon. Samples were characterized by X-ray diffraction, Raman spectroscopy, field-emission scanning electron microscopy, high-resolution transmission electron microscopy and N2 adsorption–desorption isotherms. The graphitization of the HCSs was improved with increase of heat treatment temperature. Mesopores of 𝑐𝑎. 4 nm in diameter were created on the HCSs after the heat treatment. The results of electrochemical performance measurements for the HCSs as anode material for lithium ion batteries indicate that the discharge capacity of the HCSs is improved after heat treatment at 800°C compared with the as-prepared HCSs and have a maximum value of 357 mAh/g and still retains 303 mAh/g after 40 cycles. However, the discharge capacity of the HCSs decreases and the cycling performance is improved with the increase of heat treatment temperature.

    • Author Affiliations

       

      Boyang Liu1 Yun Zhou1 Dechang Jia2 Pengjian Zuo3 Yingfeng Shao3 Jingwei Zhang4

      1. Institute of Marine Materials Science and Engineering, Shanghai Maritime University, Shanghai 201306, China
      2. Institute for Advanced Ceramics, Harbin Institute of Technology, Harbin 150001, China
      3. Department of Applied Chemistry, Harbin Institute of Technology, Harbin 150001, China
      4. Logistics Engineering College, Shanghai Maritime University, Shanghai 201306, China
    • Dates

       
  • Bulletin of Materials Science | News

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