Defective tungsten oxide (W18O49) is an oxide in the pure state with non stoichiometric ratio.W18O49 with different morphologies was prepared by a one-step solvothermal method using tungsten hexachloride (WCl6) as the tungsten source and methanol,ethanol and isopropanol as the solvents.The crystalline structure,microscopic morphology and elemental composition of W18O49 were characterized by X-ray diffractometer,scanning electron microscope and X-ray energy dispersive spectrometer.The electrochemical properties of the samples were analyzed by cyclic voltammetry (CV),galvanostatic charge/discharge (GCD) and electrochemical impedance spectroscopy (EIS).The results showed that the morphology of W18O49 prepared with different solvents varied greatly,and the sea urchin-like W18O49 prepared with ethanol as the solvent had a large specific surface area of 252.4m2/g and good electrochemical properties.The specific capacitance was as high as 476.7F/g at a current density of 1A/g,which was higher than that of W18O49 prepared with methanol and isopropanol as solvents.Moreover,the specific capacitance was 513F/g at a current density of 2A/g after complete wetting reaction,indicating that it could be used as an excellent electrode material.
Zhu Chen, Hu Jin, Wang Kaijun, Zhang Weijun, Duan Yunbiao
. Preparation of W18O49 and its electrochemical properties[J]. New Chemical Materials, 2023
, 51(5)
: 170
-175
.
DOI: 10.19817/j.cnki.issn1006-3536.2023.05.031
[1] Lu X,Zhai T,Zhang X,et al.WO3-x@Au@MnO2 core-shell nanowires on carbon fabric for high-performance flexible supercapacitors[J].Adv Mater,2012,24(7):938-944.
[2] Li Y,Yan L,Zhang J,et al.Preparation of graphene/W18O49 nanorod composites and their application in electrochromic performance[J].Journal of Materials Science:Materials in Electronics,2019,30(22):20181-20188.
[3] Peng X,Peng L,Wu C,et al.Two dimensional nanomaterials for flexible supercapacitors[J].Chem Soc Rev,2014,43(10):3303-3323.
[4] Arico A S,Bruce P,Scrosati B,et al.Nanostructured materials for advanced energy conversion and storage devices[J].Nature Materials,2005,4(5):366-377.
[5] Chen H,Hu L,Chen M,et al.Nickel-cobalt layered double hydroxide nanosheets for high-performance supercapacitor electrode materials[J].Advanced Functional Materials,2014,24(7):934-942.
[6] Luo B H,Hsu C E,Li J H,et al.Nano-composite of poly(L-lactide) and halloysite nanotubes surface-grafted with L-lactide oligomer under microwave irradiation[J].Journal of Biomedical Nanotechnology,2013,9(4):649-658.
[7] Xie J,Song B,Zhao G,et al.Citric acid induced W18O49 electrochromic films with enhanced optical modulation[J].Applied Physics Letters,2018,112(23):231902.
[8] 张守浩.混合价态钨基纳米材料的制备及在光热疗法方面的应用[D].哈尔滨:哈尔滨工业大学,2014.
[9] Yoon S,Kang E,Kim J K,et al.Development of high-performance supercapacitor electrodes using novel ordered mesoporous tungsten oxide materials with high electrical conductivity[J].Chem Commun (Camb),2011,47(3):1021-1023.
[10] Jung J,Kim D H.W18O49 nanowires assembled on carbon felt for application to supercapacitors[J].Applied Surface Science,2018,433:750-755.
[11] 刘新利,张泉,王世良,等.W18O49亚微米棒阵列的制备及其生长机理[J].中国有色金属学报,2011,21(5):6.
[12] Zhu L,Zhang Z,Ke X,et al.WO2 triggered nucleation and growth of ultra-long W18O49 structures,from nanobundles to single-crystalline microrod[J].Acta Materialia,2018,148:55-62.
[13] Xi G,Ouyang S,Li P,et al.Ultrathin W18O49 nanowires with diameters below 1nm:synthesis,near-infrared absorption,photoluminescence,and photochemical reduction of carbon dioxide[J].Angew Chem Int Ed Engl,2012,51(10):2395-2399.
[14] Park S,Shim H W,Lee C W,et al.High-power and long-life supercapacitive performance of hierarchical,3-D urchin-like W18O49 nanostructure electrodes[J].Nano Research,2015,9(3):633-643.
[15] 金洁,戴亚堂,鲁静华,等.钴酸锰@四硫化钴锰纳米复合材料的制备及其超级电容性能研究[J].化工新型材料,2021,49(6):188-191;196.
[16] Li Y,Yan L,Zhang L,et al.Design of electrochromic supercapacitor based on rGO-W18O49 nanowires/polyaniline[J].Journal of Materials Science:Materials in Electronics,2021,32(14):19179-19190.
[17] Thalji M R,Ali G a M,Algarni H,et al.Al3+ ion intercalation pseudocapacitance study of W18O49 nanostructure[J].Journal of Power Sources,2019,438:227028-227036.