采用水热合成法制备Pr掺杂NiAl双金属氢氧化物(Ni-Al-Pr LDH)和Ni-Al-Pr LDH/还原氧化石墨烯(Ni-Al-Pr LDH/rGO)电极材料。使用X射线衍射仪、红外光谱和扫描电镜等手段对样品的成分、结构和形貌进行表征,并考察添加rGO对Ni-Al-Pr LDH材料电化学性能的影响。结果表明:加入4% rGO所制复合材料Ni-Al-Pr LDH/rGO,在1A/g电流密度下比电容为1101F/g,表现出较高的电化学性能,而且其电化学性能远优异于Ni-Al-Pr LDH电极材料(比电容为439F/g),复合rGO可在一定程度上提高电极材料的电化学性能。
Ni-Al-Pr LDH and Ni-Al-Pr LDH/reduced graphene oxide (rGO) electrode materials were prepared by hydrothermal synthesis method.The composition,structural and morphology of the samples were characterized using X-ray diffraction (XRD),fourier transform infrared spectrum (FT-IR),and scanning electron microscope (SEM).Meanwhile,the effect of rGO adding amount on electrochemical performance of Ni-Al-Pr LDH was investigated.The results shown that the composite materials containing 4% rGO exhibited higher electrochemical performance,with a specific capacitance of 1101F/g at a current density of 1A/g.The electrochemical performance of the composite materials was far superior to those of Ni-Al-Pr LDH with a specific capacitance of 439F/g.This indicated that the combination of rGO could improve the electrochemical performance for electrode materials to a certain extent.
[1] Ouyang Y H,Xing T,Chen Y L,et al.Hierarchically structured spherical nickel cobalt layered double hydroxides particles grown on biomass porous carbon as an advanced electrode for high specific energy asymmetric supercapacitor[J].Journal of Energy Storage,2020,30:101454.
[2] Golmohammadi F,Amiri M.Biomass-derived graphene-based nanocomposite:a facile template for decoration of ultrathin nickel-aluminum layered double hydroxide nanosheets as high-performance supercapacitors[J].International Journal of Hydrogen Energy,2020,45(31):15578-15588.
[3] Liu N,Lin J M,Wu J H,et al.Application of CoV-LDH nano-flower in asymmetric supercapacitors with high electrochemical properties[J].Electrochimica Acta,2020,336:135550.
[4] Yadav S,Devi A.Recent advancements of metal oxides/Nitrogen-doped graphene nanocomposites for supercapacitor electrode materials[J].Journal of Energy Storage,2020,30:101486.
[5] Deng L J,Qin X W,Qiao W L,et al.Boosting the capacitive property of nickel cobalt aluminum layered double hydroxide in neutral electrolyte[J].Journal of Colloid and Interface Science,2020,578:96-105.
[6] Jing C,Liu X D,Li K,et al.The pseudocapacitance mechanism of graphene/CoAl LDH and its derivatives:are all the modifications beneficial？[J].Journal of Energy Chemistry,2021,52:218-227.
[7] Zheng X L,Han X,Zhao X X,et al.Construction of Ni-Co-Mn layered double hydroxide nanoflakes assembled hollow nanocages from bimetallic imidazolate frameworks for supercapacitors[J].Materials Research Bulletin,2018,106:243-249.
[8] Wang D,Wei A F,Tian L Y,et al.Nickel-cobalt layered double hydroxide nanosheets with reduced graphene oxide grown on carbon cloth for symmetric supercapacitor[J].Applied Surface Science,2019,483:593-600.
[9] Liu X M,Zhang Y H,Zhang X G,et al.Studies on Me/Al-layered double hydroxides (Me=Ni and Co) as electrode materials for electrochemical capacitors[J].Electrochimica Acta,2004,49(19):3137-3141.
[10] Liu L,Hu X,Zeng H Y,et al.Preparation of NiCoFe-hydroxide/polyaniline composite for enhanced-performance supercapacitors[J].Journal of Materials Science & Technology,2019,35:1691-1699.
[11] Wang X H,Li X,Huang C X,et al.Fabrication of NiCoAl-layered double hydroxide/N-GO for high energy all-solid-state asymmetric supercapacitors[J].Applied Surface Science,2020,527:146891.
[12] Liu L,Hu X,Zeng H Y,et al.Preparation of NiCoFe-hydroxide/polyaniline composite for enhanced-performance supercapacitors[J].Journal of Materials Science & Technology,2019,35(8):1691-1699.
[13] Gamil S,Antuch M,Zedan I T,et al.3D NiCr-layered double hydroxide/reduced graphene oxide sand rose-like structure as bifunctional electrocatalyst for methanol oxidation[J].Colloids and Surfaces A:Physicochemical and Engineering Aspects,2020,602:125067.
[14] Li M,Addad A,Dolci M,et al.NiMnCr layered double hydroxide-carbon spheres modified Ni foam:an efficient positive electrode for hybrid supercapacitors[J].Chemical Engineering Journal,2020,396:125370.
[15] Gao J H,Xuan H C,Xu Y K,et al.Interconnected network of zinc-cobalt layered double hydroxide stick onto rGO/nickel foam for high performance asymmetric supercapacitors[J].Electrochimica Acta,2018,286:92-102.
[16] Wang Y Y,Jiang C J,Le Y,et al.Hierarchical honeycomb-like Pt/NiFe-LDH/rGO nanocomposite with excellent formaldehyde decomposition activity[J].Chemical Engineering Journal,2019,365:378-388.
[17] Li Q,Yi Z,Cheng Y,et al.Microwave-assisted synthesis of the sandwich-like porous Al2O3/RGO nanosheets anchoring NiO nanocomposite as anode materials for lithium-ion batteries[J].Applied Surface Science,2018,427:354-362.
[18] Han Y Q,Zhang Z L,Yang M,et al.Facile preparation of reduced graphene oxide/polypyrrole nanocomposites with urchin-like microstructure for wide-potential-window supercapacitors[J].Electrochimica Acta,2018,289:238-247.
[19] Lv T,Xu Z N,Hong W,et al.Graphene oxide mediated self-sacrificial synthesis of LaCO3OH-Ni(OH)2@graphene hierarchical composite for photocatalytic H2 evolution and supercapacitor[J].Chemical Engineering Journal,2020,382:123021.
[20] Guo D X,Song X M,Tan L C,et al.A facile dissolved and reassembled strategy towards sandwich-like rGO@NiCoAl-LDHs with excellent supercapacitor performance[J].Chemical Engineering,2019,356:955-963.
[21] Huang L,Liu B C,Hou H J,et al.Facile preparation of flower-like NiMn layered double hydroxide/reduced graphene oxide microsphere composite for high-performance asymmetric supercapacitors[J].Journal of Alloys and Compounds,2019,730:71-80.
[22] Zhu Y Y,An S L,Cui J L,et al.Three-dimensional network-like amorphous NiCo-LDH nanofilms coupled with Co3O4 nanowires for high-performance supercapacitor[J].Ceramics International,2019,45(17):22095-22103.
[23] Yue L,Jia D,Tang J,et al.Improving the rate capability of ultrathin NiCo-LDH nanoflakes and FeOOH nanosheets on surface electrochemically modified graphite fibers for flexible asymmetric supercapacitors[J].Journal of Colloid and Interface Science,2020,560:237-246.
