不同锌源制备ZnO-CNF复合材料及其电容去离子性能分析

ZnO-CNF Composite Material Prepared by Different Zinc Sources and Its Capacitive Deionization Performance Analysis

选用ZnCl_2、ZnAc_2为锌源,通过静电纺丝技术制备ZnCl_2/聚丙烯腈基、ZnAc_2/聚丙烯腈基复合纳米纤维,在经过预氧化、碳化及水洗处理后,得到2种ZnO负载的碳纳米纤维(ZnO-CNF)复合材料,并利用各种仪器研究了其结构和电化学性能。结果表明,在等量锌源下,添加ZnAc_2所得到的碳纳米纤维ZnO-CNF(ZnAc_2)的结构完整、机械性能良好,且具有更高的Zn保留量和石墨化程度。对应材料组装电容器进行电化学和电容脱盐测试,ZnO-CNF电极的比电容远比CNF电极的比电容高。其中,ZnO-CNF(ZnAc_2)电极的最大电容脱盐量达到11.24mg/g,高于ZnO-CNF(ZnCl_2)电极(8.35mg/g)和CNF电极(2.01mg/g)。证明高含量的ZnO会产生高的电容脱盐量。

With ZnCl2, ZnAc2 88 zinc sources, ZnCl2/PAN based; ZnAc2/PAN based composite nanofibers were prepared by electrospinning. After preoxidation, carbonization and washing process, two kinds of ZnO loaded carbon nanofibers （ZnO-CNF） composites were obtained. Various instruments were used to study the structure and electrochemical performance of the materials. The results showed that, when the amount of different zinc sources were the same, the sample of ZnO-CNF（ZnAc2） prepared by adding ZnAc2 showed the perfect structure, good mechanical properties, higher Zn retention and degree of graphitization. The corresponding material was assembled and the electrochemical properties and capacitive desalination were study, ZnO- CNF electrode had a higher Specific capacity than the CNF electrode. ZnO-CNF（ZnAc2） electrode had the maximum capacitance and the desalination amount reached 11.24 mg/g which was higher than the ZnO-CNF（ZnCl2） electrode （8.35 mg/g） and CNF electrodes （2.01 mg/g）. That demonstrated high content of ZnO could produce high capacitance and high desalination capacity.