CeO_2-NiO纳米晶的电化学性能研究
|
摘要
以月季茎秆为模板合成生物多孔碳和氧化铈氧化镍纳米晶复合结构,并将之应用于高储能电容器领域。分析了复合材料的形貌、物相特性及比表面积。结果表明:碳层表面附有大量的10～20 nm粒径的氧化铈氧化镍纳米晶。通过循环伏安和恒流充放电测试,这种材料比电容可达237.1 F·g~(-1)。这种高储能特性与材料本身的多孔碳层结构有关,与纳米晶掺入对材料赝电容的增加有关。试验结果表明,所研究的复合材料能用于制备高性能超级电容器。
With the development of various portable electronic devices,the demand for multifunctional and miniaturized electrochemical energy storage devices increases quickly. Among them,supercapacitors have gradually become a new frontier in the field of energy storage devices. In this experiment,we used rose stems as a template to synthesize CeO_2-NiO nanocrystal/bioporous carbon composite structure and applied it to the field of high energy storage capacitors. The morphology,phase properties and specific surface area of the composites were analyzed. A large number of CeO_2-NiO nanocrystals with a grain size of 10～20 nm on the surface of the carbon layer were found. Through cyclic voltammetry and Galvanostatic charge-discharge curves tests,this material was proved to have a specific capacitance of 237.1 F·g~(-1). This high energy storage characteristic is related to the porous carbon layer structure and the increase of the pseudocapacitance of the material due to the incorporation of nanocrystals. The test results show that the composite materials studied can be used to fabricate high perfor-mance supercapacitors.
With the development of various portable electronic devices,the demand for multifunctional and miniaturized electrochemical energy storage devices increases quickly. Among them,supercapacitors have gradually become a new frontier in the field of energy storage devices. In this experiment,we used rose stems as a template to synthesize CeO_2-NiO nanocrystal/bioporous carbon composite structure and applied it to the field of high energy storage capacitors. The morphology,phase properties and specific surface area of the composites were analyzed. A large number of CeO_2-NiO nanocrystals with a grain size of 10～20 nm on the surface of the carbon layer were found. Through cyclic voltammetry and Galvanostatic charge-discharge curves tests,this material was proved to have a specific capacitance of 237.1 F·g~(-1). This high energy storage characteristic is related to the porous carbon layer structure and the increase of the pseudocapacitance of the material due to the incorporation of nanocrystals. The test results show that the composite materials studied can be used to fabricate high perfor-mance supercapacitors.
引文
[1]YAN J,WANG Q,WEI T,et al.Recent advances in design and fabrication of electrochemical supercapacitors with high Energy densities[J].Advanced Energy Materials,2014,4(4):1300816.
[2]YU X,LU B,XU Z.Super long-life supercapacitors based on the construction of nanohoneycomb-like strongly coupled CoMoO4-3D graphene hybrid electrodes[J].Advanced Materials,2014,26(7):1044-1051.
[3]CHEE W K,LIM H N,ZAINAL Z,et al.Flexible graphene-based supercapacitors:A review[J].The Journal of Physical Chemistry C,2016,120(8):4153-4172.
[4]KUMAR K S,CHOUDHARY N,JUNG Y,et al.Recent advances in two-dimensional nanomaterials for supercapacitor electrode applications[J].ACS Energy Letters,2018,3(2):482-495.
[5]刘成宝,陈丰,何凤娟,等.生物模板剂合成介孔氧化铈及其催化性能[J].苏州科技学院学报(自然科学版),2013,30(4):43-46.
[6]YUKSEL R,SARIOBA Z,CIRPAN A,et al.Transparent and flexible supercapacitors with single walled carbon nanotube thin film electrodes[J].ACS Applied Materials&Interfaces,2014,6(17):15434-15439.
[7]HOU Y,CHEN L,LIU P,et al.Nanoporous metal based flexible asymmetric pseudocapacitors[J].Journal of Materials Chemistry A,2014,2(28):10910-10916.
[8]BROUSSE T,BLANGER D,LONG J W.To be or not to be pseudocapacitive[J].Journal of The Electrochemical Society,2015,162(5):A5185-A5189.
[9]PARK J,KIM B,YOO Y E,et al.Energy-density enhancement of carbon-nanotube-based supercapacitors with redox couple in organic electrolyte[J].ACS Applied Materials&Interfaces,2014,6(22):19499-19503.
[10]HUI X,QIAN L,HARRIS G,et al.Fast fabrication of NiO@graphene composites for supercapacitor electrodes:Combination of reduction and deposition[J].Materials&Design,2016,109(5):242-250.
[11]LIU C,SUN H,QIAN J,et al.Ultrafine Mn3O4/CeO2nanorods grown on reduced graphene oxide sheets as high-performance supercapacitor electrodes[J].Journal of Alloys and Compounds,2017,722(Supplement C):54-59.
[12]CAO Y,LIU C,QIAN J,et al.Novel 3D porous graphene decorated with Co3O4/CeO2for high performance supercapacitor power cell[J].Journal of Rare Earths,2017,35(10):995-1001.
[2]YU X,LU B,XU Z.Super long-life supercapacitors based on the construction of nanohoneycomb-like strongly coupled CoMoO4-3D graphene hybrid electrodes[J].Advanced Materials,2014,26(7):1044-1051.
[3]CHEE W K,LIM H N,ZAINAL Z,et al.Flexible graphene-based supercapacitors:A review[J].The Journal of Physical Chemistry C,2016,120(8):4153-4172.
[4]KUMAR K S,CHOUDHARY N,JUNG Y,et al.Recent advances in two-dimensional nanomaterials for supercapacitor electrode applications[J].ACS Energy Letters,2018,3(2):482-495.
[5]刘成宝,陈丰,何凤娟,等.生物模板剂合成介孔氧化铈及其催化性能[J].苏州科技学院学报(自然科学版),2013,30(4):43-46.
[6]YUKSEL R,SARIOBA Z,CIRPAN A,et al.Transparent and flexible supercapacitors with single walled carbon nanotube thin film electrodes[J].ACS Applied Materials&Interfaces,2014,6(17):15434-15439.
[7]HOU Y,CHEN L,LIU P,et al.Nanoporous metal based flexible asymmetric pseudocapacitors[J].Journal of Materials Chemistry A,2014,2(28):10910-10916.
[8]BROUSSE T,BLANGER D,LONG J W.To be or not to be pseudocapacitive[J].Journal of The Electrochemical Society,2015,162(5):A5185-A5189.
[9]PARK J,KIM B,YOO Y E,et al.Energy-density enhancement of carbon-nanotube-based supercapacitors with redox couple in organic electrolyte[J].ACS Applied Materials&Interfaces,2014,6(22):19499-19503.
[10]HUI X,QIAN L,HARRIS G,et al.Fast fabrication of NiO@graphene composites for supercapacitor electrodes:Combination of reduction and deposition[J].Materials&Design,2016,109(5):242-250.
[11]LIU C,SUN H,QIAN J,et al.Ultrafine Mn3O4/CeO2nanorods grown on reduced graphene oxide sheets as high-performance supercapacitor electrodes[J].Journal of Alloys and Compounds,2017,722(Supplement C):54-59.
[12]CAO Y,LIU C,QIAN J,et al.Novel 3D porous graphene decorated with Co3O4/CeO2for high performance supercapacitor power cell[J].Journal of Rare Earths,2017,35(10):995-1001.