纳米纤维素/碳纳米管/纳米银线柔性电极的制备

目的以竹粉为原料制备纳米纤维素,并将其作为基底材料制备纳米纤维素/碳纳米管/纳米银线复合电极,应用于柔性超级电容器。方法采用化学机械处理法,将竹粉通过化学处理以及研磨、超声等处理,制备成纳米纤维素悬浮液;分别将多壁碳纳米管和纳米银线超声分散于溶剂中;最后,通过层层自组装制备纳米纤维素/碳纳米管/纳米银线复合电极,同时,作为对照组,制备纳米纤维素/碳纳米管复合电极。结果纳米纤维素纤丝的直径大约为30~100 nm,相互之间缠绕成网状结构,是很好的支撑材料,纳米纤维素/碳纳米管/纳米银线复合电极具有很好的成膜性和电化学性能,在扫描速率为30 m V/s时,面积比电容达到77.95 m F/cm~2。结论以纳米纤维素为基底,通过层层自组装方法制备的纳米纤维素/碳纳米管/纳米银线复合电极具有较好的电化学性能,可作为柔性超级电容器的电极。

Preparation of Flexible Cellulose Nanofibers/Carbon Nanotubes/Silver Nanowires Composite Electrode

The work aims to prepare cellulose nanofibers with bamboo powder as the raw material and prepare cellulose nanofibers (CNFs)/multi-walled carbon nanotubes (MWCNTs)/silver nanowires (AgNWs) composite electrode with cellulose nanofibers as the substrate. The composite electrode can be applied for the flexible supercapacitor. First, we used bamboo powder coming from nature for raw material and the aqueous CNFs suspension were prepared by chemical treatment, one time-pass grinding and sonication successively. The multi-walled carbon nanotube and silver nanowire were ultrasonically dispersed in the solvent, respectively. Finally, the CNFs/MWCNTs/AgNWs composite electrode was prepared by layer by layer method. As the control group, cellulose nanofibers/multi-walled carbon nanotubes composite electrode was prepared. Cellulose nanofibers, the diameter of which was about 30~100 nm, intertwining into a net structure, were good supporting materials. CNFs/MWCNTs/AgNWs composite electrode could be bent and the specific capacitance of it reached 77.95 mF/cm2 at 30 mV/s. With cellulose nanofibers as the substrate, the CNFs/MWCNTs/ AgNWs composite electrode prepared through layer by layer method has better electrochemical performance and it can be used as the electrode for flexible supercapacitor.