储能科学与技术 ›› 2022, Vol. 11 ›› Issue (3): 1026-1034.doi: 10.19799/j.cnki.2095-4239.2021.0543

• 储能新材料设计与先进表征专刊 • 上一篇    下一篇

石油沥青基MoS2/多孔碳复合材料的制备及其锂存储性能

李云(), 杨旺, 李永峰()   

  1. 中国石油大学(北京)重质油国家重点实验室,北京 102249
  • 收稿日期:2021-10-19 修回日期:2021-11-16 出版日期:2022-03-05 发布日期:2022-03-11
  • 通讯作者: 李永峰 E-mail:yunli2016213123@163.com;yfli@cup.edu.cn
  • 作者简介:李云(1991—),男,博士研究生,研究方向为锂离子电池负极材料,E-mail:yunli2016213123@163.com
  • 基金资助:
    国家自然科学基金项目(22178384);中国石油大学(北京)科研基金资助项目(2462018YJRC009)

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

摘要:

目前,对低成本石油沥青高附加值的利用仍面临着重大的挑战。鉴于其碳含量高,本工作利用NaHCO3模板成功制备了一种掺硫多孔碳骨架(SPC)结构。随后,以低沸点的MoCl5为钼源,升华硫为硫源,在SPC表层原位生长一层MoS2纳米片,定向制备了一种三维复合结构。该材料实现了MoS2和碳基底材料的良好接触,其相互交错的结构可以大大提高电子的传递速率,缩短了锂离子和电子传输路径。另外,该材料的多孔结构为锂离子提供了丰富的反应活性位点。当作为锂离子电池阳极进行测试时,该材料经过400圈的循环后,仍然维持着1069 mA·h/g的高比容量。这项工作可能为低成本石油沥青的高附加值利用提供一个崭新的思路。

关键词: 高附加值利用, 石油沥青, 三维结构, 锂离子电池阳极

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

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