摘要
开发油基硬碳材料是实现重油高值化利用和储钠负极材料低成本化规模化生产的重要途径。以催化油浆为原料,创新性采用液相交联协同固相氧化法制备重油基硬碳储钠材料,通过液相交联反应调控原料的分子尺寸和平面度,耦合固相氧化过程含氧官能团的进一步引入构建用于钠离子插入和闭孔填充的短程微晶结构。结果表明,液相交联沥青L300在固相氧化温度300℃、氧化时间3 h下制备的固相氧化材料,经温度1400℃、炭化2 h制备重油基硬碳储钠材料HC-300℃-3h-1400℃,呈现出典型的涡轮状非晶态硬碳结构,作为钠离子电池负极材料的可逆容量达254.48 mA·h/g,初始库仑效率为63.9%;与液相交联沥青直接炭化制备的软碳钠电负极材料相比,平台容量增长了3.34倍,总容量增长了1.42倍,展现出良好的倍率性能和循环稳定性。
The development of oil-based hard carbon materials is an important way to achieve the highvalue utilization of heavy oils and the large-scale low-cost production of sodium storage anode materials.Using catalytic slurry as raw material,heavy oil-based hard carbon sodium storage materials were prepared by liquid phase crosslinking in combination with solid phase oxidation.The molecular dimension and planarity of raw material were regulated by liquid phase crosslinking reaction,which was coupled with the further introduction of oxygen functional groups in solid phase oxidation process to construct the short-range microcrystalline structure for sodium ion insertion and closed-cell filling.The results show that the solid phase oxidized material was prepared using liquid phase crosslinked asphalt L300 through solid phase oxidation at 300℃for 3 h,and further carbonized at 1400℃for 2 h to prepare the heavy oil-based hard carbon sodium storage material HC-300℃-3h-1400℃,which exhibits atypical turbine-like amorphous hard carbon structure.As a negative electrode material for sodium ion batteries,the reversible capacity is 254.48 mA·h/g,and the initial Coulomb efficiency is 63.9%.Compared with the soft carbon sodium anode material prepared by direct carbonization of liquid phase crosslinked asphalt,the platform capacity increases by 3.34 times,and the total capacity increases by 1.42 times,showing good rate performance and cycle stability.
作者
马文贞
娄斌
李骏
师楠
温福山
杨修洁
薛鑫
王增浩
刘东
MA Wenzhen;LOU Bin;LI Jun;SHI Nan;WEN Fushan;YANG Xiujie;XUE Xin;WANG Zenghao;LIU Dong(College of Chemistry and Chemical Engineering,China University of Petroleum,Qingdao 266580,China;CNOOC Institute of Chemical&Advanced Materials(Beijing)Co.,Ltd.,Beijing 102209,China)
出处
《石油学报(石油加工)》
北大核心
2025年第6期1676-1686,共11页
Acta Petrolei Sinica(Petroleum Processing Section)
基金
国家自然科学基金青年基金项目(22108309)
泰山学者青年专家计划项目(tsqn202312135)资助。
关键词
重油
液-固协同氧化
分子尺寸
含氧官能团
短程微晶
硬碳
钠离子电池
heavy oil
liquid-solid co-oxidation
molecular dimension
oxygen functional group
short-range microcrystalline
hard carbon
sodium-ion battery
作者简介
第一作者:马文贞,女,硕士研究生,从事富芳烃重油制备沥青基硬碳材料及储钠性能研究,E-mail:2044390198@qq.com;通信作者:刘东,男,教授,博士,从事石油与天然气加工、新能源与可再生能源方面的研究,Tel:0532-86960381,E-mail:liudong@upc.edu.cn;通信作者:娄斌,男,副教授,博士,从事重质油化学及其高值化利用研究,E-mail:20210063@upc.edu.cn。
