镍铝双氢氧化物的制备及其电容性能研究
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摘要
以聚乙烯吡咯烷酮(PVP)为结构导向剂,通过简单的水热法成功合成了直接生长在泡沫镍上的镍铝双氢氧化物(NiAl-LDH)。采用X射线衍射(XRD)对样品的结构进行表征,并通过循环伏安、交流阻抗和恒流充放电研究了Ni Al-LDH的电化学性能。结果表明,所制备的Ni Al-LDH为典型的类水滑石结构特征并表现出优异的电化学性能。其在1 A/g电流密度下的比电容为1 074.2 F/g;在10 A/g时,容量保持率为84.1%,较相同条件下制备的无PVP电极材料的电化学性能有明显提高。
Nickel-aluminum layered double hydroxides(NiAl-LDH) were directly grown on nickel foam by a simplehydrothermal method using polyvinylpyrrolidone(PVP) as a structure directing agent. The structure of the samplewas characterized by X ray diffraction(XRD), and the electrochemical performance of Ni Al-LDH was investigated bycyclic voltammetry, AC impedance and galvanostatic charge-discharge tests. The results show that the preparedNi Al-LDH is a typical hydrotalcite-like structure with excellent electrochemical performance. Its specific capacity is1074.2 F/g at a current density of 1 A·g-1 and the capacitance retention rate is 84.1% when the current density isincreased from 1 to 10 A·g-1. Compared with the electrode prepared without addition of PVP, the electrochemicalproperties of the electrode material with addition of PVP is significantly improved.
Nickel-aluminum layered double hydroxides(NiAl-LDH) were directly grown on nickel foam by a simplehydrothermal method using polyvinylpyrrolidone(PVP) as a structure directing agent. The structure of the samplewas characterized by X ray diffraction(XRD), and the electrochemical performance of Ni Al-LDH was investigated bycyclic voltammetry, AC impedance and galvanostatic charge-discharge tests. The results show that the preparedNi Al-LDH is a typical hydrotalcite-like structure with excellent electrochemical performance. Its specific capacity is1074.2 F/g at a current density of 1 A·g-1 and the capacitance retention rate is 84.1% when the current density isincreased from 1 to 10 A·g-1. Compared with the electrode prepared without addition of PVP, the electrochemicalproperties of the electrode material with addition of PVP is significantly improved.
引文
[1] CAO Y, LI G T, Li X B. Graphene/layered double hydroxide nano-composite:properties, synthesis, and applications[J]. Chemical En-gineering Journal, 2016, 292:207-223.
[2] WANG B, WILLIAMS G R, Ch ANG Z, et al. Hierarchical NiAllayered double hydroxide/multiwalled carbon nanotube/nickelfoam electrodes with excellent pseudocapacitive properties[J]. ACSApplied Materials&Interfaces, 2014, 6(18):16304-16311.
[3] SONG Y, WANG J, LI Z, et al. Self-assembled hierarchical porous-layered double hydroxides by solvothermal method and their appli-cation for capacitors[J]. Microporous and Mesoporous Materials,2012, 148(1):159-165.
[4] ZHANG L J, HUI K N, SAN H K, et al. High-performance hybridsupercapacitor with 3D hierarchical porous flower-like layereddouble hydroxide grown on nickel foam as binder-free electrode[J].Journal of Power Sources, 2016, 318:76-85.
[5] AN C, WANG Y, HUANG Y, et al. Novel three-dimensionalNiCo2O4hierarchitectures:solvothermal synthesis and electrochemi-cal properties[J]. Cryst Eng Comm, 2014, 16(3):385-392.
[6] KOCZKUR K M, MOURDIKOUDIS S, POLAVARAPU L, et al.Polyvinylpyrrolidone(PVP)in nanoparticle synthesis[J]. DaltonTransactions, 2015, 44(41):17883-17905.
[7] SEN P, DE A. Electrochemical performances of poly(3,4-ethylene-dioxythiophene)-NiFe2O4nanocomposite as electrode for superca-pacitor[J]. Electrochimica Acta, 2010, 55(16):4677-4684.
[8] GHODBANE O, LOURO M, COUSTAN L, et al. Microstructuraland morphological effects on charge storage properties in MnO2-ca-rbon nanofibers based supercapacitors[J]. Journal of the Electro-chemical Society, 2013, 160(11):A2315-A2321.
[2] WANG B, WILLIAMS G R, Ch ANG Z, et al. Hierarchical NiAllayered double hydroxide/multiwalled carbon nanotube/nickelfoam electrodes with excellent pseudocapacitive properties[J]. ACSApplied Materials&Interfaces, 2014, 6(18):16304-16311.
[3] SONG Y, WANG J, LI Z, et al. Self-assembled hierarchical porous-layered double hydroxides by solvothermal method and their appli-cation for capacitors[J]. Microporous and Mesoporous Materials,2012, 148(1):159-165.
[4] ZHANG L J, HUI K N, SAN H K, et al. High-performance hybridsupercapacitor with 3D hierarchical porous flower-like layereddouble hydroxide grown on nickel foam as binder-free electrode[J].Journal of Power Sources, 2016, 318:76-85.
[5] AN C, WANG Y, HUANG Y, et al. Novel three-dimensionalNiCo2O4hierarchitectures:solvothermal synthesis and electrochemi-cal properties[J]. Cryst Eng Comm, 2014, 16(3):385-392.
[6] KOCZKUR K M, MOURDIKOUDIS S, POLAVARAPU L, et al.Polyvinylpyrrolidone(PVP)in nanoparticle synthesis[J]. DaltonTransactions, 2015, 44(41):17883-17905.
[7] SEN P, DE A. Electrochemical performances of poly(3,4-ethylene-dioxythiophene)-NiFe2O4nanocomposite as electrode for superca-pacitor[J]. Electrochimica Acta, 2010, 55(16):4677-4684.
[8] GHODBANE O, LOURO M, COUSTAN L, et al. Microstructuraland morphological effects on charge storage properties in MnO2-ca-rbon nanofibers based supercapacitors[J]. Journal of the Electro-chemical Society, 2013, 160(11):A2315-A2321.