氮掺杂淀粉基硬碳负极材料制备及其储钠性能研究  

Research on the preparation and sodium storage properties of nitrogen-doped starch-based hard carbon anode material

作　　者：张志国 杨观华 张杰[1] 王旭[1] 李翼宏[1] ZHANG Zhiguo;YANG Guanhua;ZHANG Jie;WANG Xu;LI Yihong(School of Mechanical and Automotive Engineering,Guangxi University of Science and Technology,Liuzhou 545006,China;Guangxi Key Laboratory of Low Carbon Energy Materials(Guangxi Normal University),Guilin 541004,China)

机构地区：[1]广西科技大学机械与汽车工程学院,广西柳州545616 [2]广西低碳能源材料重点实验室(广西师范大学),广西桂林541004

出　　处：《广西科技大学学报》2024年第3期83-90,共8页Journal of Guangxi University of Science and Technology

基　　金：广西科技大学研究生教育创新计划项目(GKYC202317);广西自然科学基金面上项目(2020GXNSFAA297019);广西低碳能源材料重点实验室经费资助项目(2020GKLLCEM01);广西汽车零部件与整车技术重点实验室经费资助项目(2022GKLACVTZZ05)。

摘　　要：钠离子电池(sodium-ion batteries,SIBs)作为未来极具竞争力的大型储能装置之一,由于没有合适的负极材料,其商业化应用受到严重阻碍,因此,开发新型高性能SIBs负极材料是目前亟待解决的问题之一。硬碳材料由于来源丰富和成本低廉受到广泛关注,使用马铃薯淀粉为前驱体,采用不同的氮源对马铃薯淀粉进行掺杂改性,从而制备出氮掺杂硬碳材料。测试结果表明氮掺杂硬碳材料相比于未掺杂改性材料,其电化学性能显著提高。以二氰二胺为氮源掺杂的硬碳材料在0.1 A/g的电流密度下循环100圈后,仍能保持220.47 mA·h/g的可逆比容量,以尿素为氮源的硬碳材料能保持233.36 mA·h/g可逆比容量。结果表明,氮元素的掺杂可以有效地提升硬碳材料的离子电导率、增加硬碳材料的可逆比容量,从而整体提升硬碳材料的电化学性能。Sodium-ion batteries(SIBs)are one of the most competitive candidates for large-scale energy storage devices in the future.However,their commercial application severely lags behind due to lack of suitable anode materials,so the development of new high-performance SIBs anode materials is a pressing issue.Hard carbon materials have received much attention for their abundant sources and low cost.In this paper,nitrogen-doped hard carbon materials were prepared by doping potato starch with different nitrogen sources for modification with potato starch as a precursor.The test results showed that the electrochemical properties of the nitrogen-doped hard carbon materials were greatly improved compared with those of the undoped-modified materials.The hard carbon material doped with dicyanodiamine as the nitrogen source could still maintain a reversible specific capacity of 220.47 mA∙h/g after 100 cycles at 0.1 A/g,and the hard carbon material with urea as the nitrogen source could maintain a reversible specific capacity of 233.36 mA∙h/g after 100 cycles at 0.1 A/g.It shows that the doping of nitrogen can effectively enhance the ionic conductivity and the reversible specific capacity of hard carbon materials,thus improving the overall electrochemical performance of hard carbon materials.

关 键 词：钠离子电池(SIBs) 硬碳 淀粉 氮掺杂 负极材料 

分 类 号：TM912[电气工程—电力电子与电力传动]