Energy Storage Science and Technology ›› 2022, Vol. 11 ›› Issue (3): 1026-1034.doi: 10.19799/j.cnki.2095-4239.2021.0543

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Synthesis of petroleum asphalt-based MoS2/porous carbon material and its Li-storage performance

Yun LI(), Wang YANG, Yongfeng LI()   

  1. State Key Laboratory of Heavy Oil Processing, China University of Petroleum Beijing, Beijing 102249, China
  • Received:2021-10-19 Revised:2021-11-16 Online:2022-03-05 Published:2022-03-11
  • Contact: Yongfeng LI E-mail:yunli2016213123@163.com;yfli@cup.edu.cn

Abstract:

Presently, the high value-added utilization of low-cost petroleum asphalt faces great challenges. Herein, based on the high carbon content of asphalt, an S-doping porous carbon (SPC) framework structure was successfully prepared using a NaHCO3 template. Afterward, a three-dimensional structure was prepared by the in situ growth of MoS2 nanosheets on the surface of the SPC using MoCl5 and sublimated sulfur as the molybdenum and sulfur sources. The as-formed material achieves a good contact between MoS2 and the carbon substrate, and its interlaced structure can greatly improve the electron transfer rate and shorten the transmission path of Li+ and e-. Additionally, its porous structure provides abundant reactive sites for Li+. When tested as lithium anode, the material obtains a high specific capacity of 1069 mA·h·g-1 after 400 cycles. This work may provide a new idea for the high value-added utilization of low-cost petroleum asphalt.

Key words: high value-added utilization, petroleum asphalt, three-dimensional structure, lithium anode

CLC Number: