N/S共掺杂空心石墨烯球的制备及其储钠性能研究  

N/S-doped graphene hollow microspheres as anode materials for sodium-ion batteries

作　　者：张广元 高欣然 杨金连 陈猛 宋德辉 罗小马 王坤 ZHANG Guangyuan;GAO Xinran;YANG Jinlian;CHEN Meng;SONG Dehui;LUO Xiaoma;WANG Kun(School of Chemical Engineering,University of Science and Technology Liaoning,Anshan 114051,China)

机构地区：[1]辽宁科技大学化学工程学院,辽宁鞍山114051

出　　处：《辽宁科技大学学报》2025年第1期51-58,共8页Journal of University of Science and Technology Liaoning

基　　金：辽宁科技大学大学生创新创业训练计划。

摘　　要：采用软模板法制备N/S共掺杂空心石墨烯球,利用XRD、XPS、SEM和TEM对材料的形貌结构进行表征,以NS-rGO为负极材料组装了钠离子半电池并通过恒流充放电测试其电化学性能。结果表明,N/S共掺杂空心石墨烯球成功制备,得益于N/S元素掺杂引入的大量储钠活性位点,在0.1 A/g的电流密度下,NS-rGO材料的首圈可逆容量提升至326.1 mAh/g。中空石墨烯球结构保障了NS-rGO材料具有优秀的循环保持率和较高的倍率性能,在0.1 A/g电流密度下循环500圈后仍有301.1 mAh/g的容量,容量保持率为96.7%,在5.0 A/g电流密度下循环2 000圈后仍有170.8 mAh/g的容量,容量保持率为96.4%。N/S co-doped hollow graphene spheres were prepared by the soft template method.The morpholo-gy and structure of the materials were characterized by XRD,XPS,SEM and TEM,and the electrochemical properties of the NS-rGO as anode materials for sodium ion batteries were evaluated by a galvanostatic charge/discharge technique.The results showed that N/S co-doped hollow graphene spheres were successfully pre-pared with a specific hollow structure.The graphene spheres with large number of sodium storage active sites introduced by N/S elemental doping demonstrates an excellent sodium storage capacity of 326.1 mAh/g at a current density of 0.1 A/g.The hollow graphene sphere structure ensures that the NS-rGO material exhibits excellent cycle retention and superior rate capability.Specifically,it maintains a capacity of 301.1 mAh/g with a capacity retention rate of 96.7%after 500 cycles at a current density of 0.1 A/g.Even under high-rate of 5.0 A/g,the material demonstrates remarkable stability,retaining 170.8 mAh/g with a capacity retention rate of 96.4%after 2000 cycles.

关 键 词：石墨烯 N/S共掺杂 中空结构 负极 储钠 

分 类 号：TM911[电气工程—电力电子与电力传动]