Growth of aluminum-substituted nickel hydroxide nanoflakes on nickel foam with ultrahigh specific capacitance at high current density

Aluminum-substituted α-Ni(OH)2 nanoflakes grown on nickel foam as electrode for application in supercapacitor were synthesized in the presence of urea through a hydrothermal route. The as-synthesized nanoflakes with ultra-thin thickness of about 12 nm presented isolated state on Nickel foam. The sample substituted with 9.8 % Al showed the highest specific capacitance of 3637 F g−1 at scan rate of 5 mV s−1 in 3 M KOH aqueous solution. This sample also kept high specific capacitance of 1142 F g−1 at high charge and discharge current density of 32 A g−1. The excellent electrochemical performance can be ascribed to the thin thickness and isolated state of these nanoflakes. The two characteristics of nanoflakes guaranteed their full contact with electrolyte during the electrochemical reactions, therefore leading to the instant and full utilization of electroactive material. During stability test, the capacitance of material still remained 81 % after 2000 charge–discharge cycles. These results demonstrated that the nanoflakes could be applied as high performance electrode material in supercapacitor.

[1]  Qianqian Li,et al.  Microwave-assisted synthesis of CoAl-layered double hydroxide/graphene oxide composite and its application in supercapacitors , 2012 .

[2]  Min Chen,et al.  Nickel–Cobalt Layered Double Hydroxide Nanosheets for High‐performance Supercapacitor Electrode Materials , 2014 .

[3]  Huaiyong Zhu,et al.  Phase Distribution and Electrochemical Properties of Al-Substituted Nickel Hydroxides , 2007 .

[4]  M. Aghazadeh,et al.  Electrochemical preparation of α-Ni(OH)2 ultrafine nanoparticles for high-performance supercapacitors , 2014, Journal of Solid State Electrochemistry.

[5]  Li Ruiyi,et al.  Three-dimensional activated reduced graphene oxide nanocup/nickel aluminum layered double hydroxides composite with super high electrochemical and capacitance performances , 2013 .

[6]  Guorong Chen,et al.  One-pot hydrothermal synthesis of reduced graphene oxide/Ni(OH)2 films on nickel foam for high performance supercapacitors , 2014 .

[7]  C. Cao,et al.  Different additives-substituted α-nickel hydroxide prepared by urea decomposition , 2004 .

[8]  Feng Li,et al.  Anchoring Hydrous RuO2 on Graphene Sheets for High‐Performance Electrochemical Capacitors , 2010 .

[9]  Guangwu Yang,et al.  Electrodeposited nickel hydroxide on nickel foam with ultrahigh capacitance. , 2008, Chemical communications.

[10]  Jun Wang,et al.  In Situ Ni/Al Layered Double Hydroxide and Its Electrochemical Capacitance Performance , 2010 .

[11]  Qiang Zhang,et al.  Advanced Asymmetric Supercapacitors Based on Ni(OH)2/Graphene and Porous Graphene Electrodes with High Energy Density , 2012 .

[12]  Rudong Zhao,et al.  Preparation of Yb-substituted α-Ni(OH)2 and its physicochemical properties , 2014 .

[13]  Zhongfan Liu,et al.  Ribbon- and boardlike nanostructures of nickel hydroxide: synthesis, characterization, and electrochemical properties. , 2005, The journal of physical chemistry. B.

[14]  Xing Xie,et al.  High-performance nanostructured supercapacitors on a sponge. , 2011, Nano letters.

[15]  C. Cao,et al.  Al-substituted α-nickel hydroxide prepared by homogeneous precipitation method with urea , 2004 .

[16]  Youfu Wang,et al.  Embedding Co3O4 nanoparticles in SBA-15 supported carbon nanomembrane for advanced supercapacitor materials , 2013 .

[17]  R. Che,et al.  One‐Step Fabrication of Ultrathin Porous Nickel Hydroxide‐Manganese Dioxide Hybrid Nanosheets for Supercapacitor Electrodes with Excellent Capacitive Performance , 2013 .

[18]  Li Ruiyi,et al.  High-performance supercapacitors materials prepared via in situ growth of NiAl-layered double hydroxide nanoflakes on well-activated graphene nanosheets , 2013 .

[19]  Bin Wang,et al.  Graphene Nanosheet/Ni2+/Al3+ Layered Double-Hydroxide Composite as a Novel Electrode for a Supercapacitor , 2011 .

[20]  G. Botte,et al.  Exfoliated nickel hydroxide nanosheets for urea electrolysis , 2011 .

[21]  Xin-bo Zhang,et al.  Electrostatic Induced Stretch Growth of Homogeneous β-Ni(OH)2 on Graphene with Enhanced High-Rate Cycling for Supercapacitors , 2014, Scientific Reports.

[22]  D. Noréus,et al.  Alpha Nickel Hydroxides as Lightweight Nickel Electrode Materials for Alkaline Rechargeable Cells , 2003 .

[23]  I. Natkaniec,et al.  Atomic structure and lattice dynamics of Ni and Mg hydroxides , 2010 .

[24]  D. Noréus,et al.  Evaluation of nano-crystal sized α-nickel hydroxide as an electrode material for alkaline rechargeable cells , 2006 .

[25]  Guiling Wang,et al.  Structural and electrochemical performance of Al-substituted β-Ni(OH)2 nanosheets electrodes for nickel metal hydride battery , 2013 .

[26]  C. Cao,et al.  The structure and electrochemical performance of spherical Al-substituted α-Ni(OH)2 for alkaline rechargeable batteries , 2005 .

[27]  Guiling Wang,et al.  Effect of Al-doped β-Ni(OH)2 nanosheets on electrochemical behaviors for high performance supercapacitor application , 2013 .

[28]  Fang-yong He,et al.  In situ fabrication of nickel aluminum-layered double hydroxide nanosheets/hollow carbon nanofibers composite as a novel electrode material for supercapacitors , 2014 .

[29]  Hao Jiang,et al.  Hierarchical self-assembly of ultrathin nickel hydroxide nanoflakes for high-performance supercapacitors , 2011 .

[30]  B. Tay,et al.  Three-dimensional Ni(OH)2 nanoflakes/graphene/nickel foam electrode with high rate capability for supercapacitor applications , 2014 .

[31]  Jingwen Zhao,et al.  Fabrication of aluminum-doped α-Ni(OH)2 with hierarchical architecture and its largely enhanced electrocatalytic performance , 2012 .

[32]  Weiyang Li,et al.  Synthesis, characterization and electrochemical properties of aluminum-substituted alpha-Ni(OH)(2) hollow spheres , 2008 .

[33]  H. Dai,et al.  Ni(OH)2 nanoplates grown on graphene as advanced electrochemical pseudocapacitor materials. , 2010, Journal of the American Chemical Society.

[34]  H. Hng,et al.  Oxidation-etching preparation of MnO2 tubular nanostructures for high-performance supercapacitors. , 2012, ACS applied materials & interfaces.