柔性MOF衍生硫化亚锡/碳纤维的制备及储钠性能  

Preparation and sodium storage performance of flexible MOF-derived stannous sulfide/carbon nanofibers

作　　者：吴采芩 戴涵 李正淳 乔辉[1] Wu Caiqin;Dai Han;Li Zhengchun;Qiao Hui(Key Laboratory of Eco-textiles,Ministry of Education,Jiangnan University,Wuxi 214122)

机构地区：[1]江南大学生态纺织教育部重点实验室,无锡214122

出　　处：《化工新型材料》2024年第12期106-110,115,共6页New Chemical Materials

基　　金：江苏省自然科学基金面上项目(BK20201343);国家自然科学基金(21201083)。

摘　　要：将Sn-MOF分散在N,N-二甲基甲酰胺中,并加入聚丙烯腈(PAN)静电纺丝得到Sn-MOF/PAN纳米纤维,经过高温煅烧后得到了硫化亚锡/碳纤维(SnS/CNFs)。SnS/CNFs-2电极材料具有良好的柔性,在弯折状态下依然保持着良好的柔性。通过扫描电镜、X射线衍射仪和EDS元素分析等表征方法,测定了SnS/CNFs-2的形貌、晶体结构。将该柔性电极材料作为钠离子电池负极材料时,表现出优异的倍率性能和循环稳定性。结果表明:对于SnS/CNFs-2电极材料,其具有良好的倍率性能,在1A/g、2A/g、5A/g、10A/g的电流密度下对应的放电比容量分别为271mAh/g、236mAh/g、157mAh/g、64mAh/g。另外,SnS/CNFs-2复合纳米材料在高达1A/g的大电流密度下表现出良好的循环稳定性,循环100圈后,放电容量高达260mAh/g。Sn-MOF powders were dispersed in N,N-dimethylformamide,and then added with polyacrylonitrile(PAN)electrospinning to obtain Sn-MOF/PAN nanofibers.The nanofibers were calcined at high temperature to prepare stannous sulfide/carbon nanofibers(SnS/CNFs).The SnS/CNFs-2 electrode had good flexibility and it could still maintain good flexibility in the bending state.The morphology and crystal structure of SnS/CNFs-2 were determined by SEM,XRD and EDS.When the flexible material was used as the anode material of sodium-ion battery,it exhibited excellent rate performance and cyclic stability.The results showed that for SnS/CNFs-2 composite,the corresponding specific discharge capacities under the current density of 1A/g,2A/g,5A/g,and 10A/g were 270mAh/g,236mAh/g,157mAh/g,64mAh/g,respectively.In addition,the SnS/CNFs-2 nanofibers showed good cyclic stability at a high current density of 1A/g,with a discharge capacity of up to 260 mAh/g after 100 cycles.

关 键 词：SNS Sn-MOF 静电纺丝 自支撑电极 钠离子电池 

分 类 号：TQ455.49[化学工程—农药化工] TS195.9[轻工技术与工程—纺织化学与染整工程]