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作 者:武比 秦丽溶[1] 赵建伟[1] 向源吉 WU Bi;QIN Lirong;ZHAO Jianwei;XIANG Yuanji(School of Physical Science and Technology,Southwest University,Chongqing 400715,China)
机构地区:[1]西南大学物理科学与技术学院,重庆400715
出 处:《复合材料学报》2022年第12期5727-5735,共9页Acta Materiae Compositae Sinica
基 金:重庆市自然科学基金(cstc2019jcyj-msxmX0311);中央高校基本科研业务费专项资金(XDJK2020B055)。
摘 要:超级电容器具有充放电快、比电容高、循环稳定性好等优点,已成为一种重要的储能器件,其性能主要取决于电极材料的电化学性能。具有高比表面积和环境友好性的复合纳米材料,是超级电容器的理想电极材料。本文首先采用水热法在碳布基底上制备了氢氧化钴纳米线,并以纳米线为基体,在其上二次水热合成镍钼氢氧化物纳米片,再经过低温退火和磷化,最终获得了CoO@NiMo-O(P)分级复合纳米材料。利用SEM、TEM及XPS等技术对样品形貌、结构和元素化合价进行了表征和分析。电化学测试结果表明:该分级复合纳米材料具有良好的电容性能,在1 A/g的电流密度下比电容可达1304.55 F/g,且在10 A/g的电流密度下经过1000次充放电后,比电容保持率高达87%,表现出了良好的循环特性。Supercapacitor,which has a series of advantages such as fast charge and discharge,high specific capacitance as well as good cycle stability,has become an important energy storage device,whose performance mainly depends on the electrochemical properties of electrode materials.Composite nanomaterials with high specific surface area and environmental friendliness are ideal electrode materials for supercapacitors.In this paper,nickelmolybdenum nanosheets were grown on the surface of cobalt hydroxide nanowires on the carbon cloth substrate by a two-step hydrothermal method to achieve CoO@NiMo-O(P)composite nanomaterials after low temperature annealing and phosphorlation.The morphology,structure and chemical valence of the samples were characterized and analyzed by SEM,TEM and XPS.The results of electrochemical tests show that the hierarchical CoO@NiMoO(P)composites has good capacitance performance.The specific capacitance reaches 1304.55 F/g at a low current density of 1 A/g,and a capacity retention of 87%is exhibited after 1000 charge and discharge at a current density of 10 A/g,showing good cycle stability.
分 类 号:TB333[一般工业技术—材料科学与工程]
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