酚醛树脂改性沥青基硬碳的制备及储钠性能研究  

Preparation of hard carbon from phenolic resin modified petroleum asphalt and study on its sodium storage performance

作　　者：李旭东[1] 谭晓杰 刘亚超 王瑞[1] 刘钦莲 赵青山[1] LI Xu-dong;TAN Xiao-jie;LIU Ya-chao;WANG Rui;LIU Qin-lian;ZHAO Qing-shan(College of Chemistry and Chemical Engineering,China University of Petroleum(East China),Qingdao 266580,China)

机构地区：[1]中国石油大学(华东)化学化工学院,山东青岛266580

出　　处：《现代化工》2024年第S01期118-123,共6页Modern Chemical Industry

基　　金：国家自然科学基金(22208375)。

摘　　要：石油沥青作为炼油副产品被用作多种碳质材料前驱体,但在高温碳化过程中易石墨化,不利于钠离子储存。将酚醛树脂引入硬质沥青共碳化,促进沥青分子与酚醛树脂分子间的交联,抑制碳层熔融重排,得到酚醛树脂改性沥青基硬碳材料。当酚醛树脂添加质量比例为1∶1时,在1200℃碳化所得硬碳材料具有最佳的储钠电化学性能。在0.05 A/g电流密度下,比容量达270.2 mAh/g,首次库仑效率为63.8%。在0.3 A/g电流密度下,循环1200圈后容量保持率达71.6%。Hard carbon is regarded as the most promising anode material for sodium⁃ion batteries(SIBs)due to its high specific capacity and good cyclic stability.As a by⁃product of oil refining,petroleum asphalt is commonly used as a precursor for various carbonaceous materials.However,its tendency to graphitize during high⁃temperature carbonization limits its application for sodium⁃ion storage.To address this issue,the co⁃carbonization of hard asphalt with phenolic resin is proposed.This strategy promotes cross⁃linking between asphalt and phenolic resin molecules,preventing carbon layers from melting and rearrangement.Consequently,a hard carbon material based on phenolic resin⁃modified asphalt is obtained.Notably,the hard carbon material obtained at 1200℃with a phenolic resin addition ratio of 1∶1 yields the best electrochemical performance for sodium⁃ion storage,which exhibits a specific capacity of 270.2 mAh·g^(-1)at a current density of 0.05 A·g^(-1),and delivers an initial coulomb efficiency(ICE)of 63.8%.Moreover,the capacity retention rate remains at 71.6%even after 1200 cycles under a current density of 0.3 A·g^(-1).

关 键 词：硬质沥青 酚醛树脂 改性 硬碳 钠离子电池 

分 类 号：TM242[一般工业技术—材料科学与工程]