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NaHCO_(3)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MoCl_(5)为钼源,升华硫为硫源,在SPC表层原位生长一层MoS_(2)纳米片,定向制备了一种三维复合结构。该材料实现了MoS_(2)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。
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 NaHCO_(3) template.Afterward,a three-dimensional structure was prepared by the in situ growth of MoS_(2) nanosheets on the surface of the SPC using MoCl_(5) and sublimated sulfur as the molybdenum and sulfur sources.The as-formed material achieves a good contact between MoS_(2) 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.
作者
李云
杨旺
李永峰
LI Yun;YANG Wang;LI Yongfeng(State Key Laboratory of Heavy Oil Processing,China University of Petroleum Beijing,Beijing 102249,China)
出处
《储能科学与技术》
CAS
CSCD
北大核心
2022年第3期1026-1034,共9页
Energy Storage Science and Technology
基金
国家自然科学基金项目(22178384,21776308,21908245)
中国石油大学(北京)科研基金资助项目(2462018YJRC009,2462017YJRC051)。
关键词
高附加值利用
石油沥青
三维结构
锂离子电池阳极
high value-added utilization
petroleum asphalt
three-dimensional structure
lithium anode
