PVP辅助Co3O4纳米雪花合成及在超级电容器中的应用  

PVP-directed Synthesis of Co3O4 Nanosnowfl ake and Its Application in Supercapacitor

作　　者：徐艺瑾 何增 谢宇欣 许星星 蒋澍 Xu Yijin;He Zeng;Xie Yuxin;Xu Xingxing;Jiang Shu(School of Food and Chemical Engineering,Shaoyang University,Hu'nan,422000)

机构地区：[1]邵阳学院食品与化学工程学院,湖南422000

出　　处：《当代化工研究》2024年第10期80-82,共3页Modern Chemical Research

基　　金：湖南省大学生创新创业训练计划一般项目“多孔钴金属氧化物的PVP的合成及其在超级电容器中的应用”(项目编号:S202210547051);湖南省教育厅科学研究一般项目“多孔钴铁双过渡金属氧化物的软模板合成及其超容性质研究”(项目编号:21C0590);邵阳学院校级教学改革研究项目“基于超星智慧教学系统的物理化学精准混合式教学的探索及实践”(项目编号:2023JG38)。

摘　　要：本文以氯化钴为原料,聚乙烯吡咯烷酮(PVP)作为形貌控制剂,采用水热法与后续高温煅烧相结合,制备了雪花状四氧化三钴多孔纳米片(Co3O4PMS)。利用XRD和SEM方法对Co3O4PMS的物相和表面形貌进行了鉴定和表征。结果表明,Co3O4PMS具有比较均匀的多孔雪花片状结构,这为增大与溶液的接触面积提供了便利。该材料在电流密度为1?A·g-1时,比电容达到566.87?F·g-1,并在2?A·g-1电流密度下进行了循环稳定性测试,经过2000次循环充放电后,比电容为285?F·g-1,电容保留率为66.31%,预期将在超级电容器领域具有一定的潜在价值。In this paper,sponge like cobalt oxide porous nanosheets(Co3O4 PMS)were prepared by using Cobalt(Ⅱ)chloride as raw material,polyvinylpyrrolidone(PVP)as the morphology control agent through hydrothermal method and subsequent high-temperature calcination.The phase and surface morphology of the synthesized Co3O4 PMS were identified and characterized using XRD and SEM methods.The Co3O4 PMS displayed a relatively uniform hollow snowflake sheet structure,which provides convenience for increasing the contact area with the solution.At a current density of 1 A·g-1,the specific capacitance of this material reached 566.87 F·g-1.Cyclic stability test was then conducted at a current density of 2 A·g-1.After 2000 cycles of charging and discharging,the specific capacitance of the electrode material was 285 F·g-1,with a retention rate of 66.31%.It is expected to have certain potential value in supercapacitor.

关 键 词：CO3O4 PVP 超级电容器 

分 类 号：O646.5[理学—物理化学]