One-Pot Synthesis of Tunable Crystalline Ni3 S4 @Amorphous MoS2 Core/Shell Nanospheres for High-Performance Supercapacitors.

Transition metal sulfides gain much attention as electrode materials for supercapacitors due to their rich redox chemistry and high electrical conductivity. Designing hierarchical nanostructures is an efficient approach to fully utilize merits of each component. In this work, amorphous MoS(2) is firstly demonstrated to show specific capacitance 1.6 times as that of the crystalline counterpart. Then, crystalline core@amorphous shell (Ni(3)S(4)@MoS(2)) is prepared by a facile one-pot process. The diameter of the core and the thickness of the shell can be independently tuned. Taking advantages of flexible protection of amorphous shell and high capacitance of the conductive core, Ni(3)S(4) @amorphous MoS(2) nanospheres are tested as supercapacitor electrodes, which exhibit high specific capacitance of 1440.9 F g(-1) at 2 A g(-1) and a good capacitance retention of 90.7% after 3000 cycles at 10 A g(-1). This design of crystalline core@amorphous shell architecture may open up new strategies for synthesizing promising electrode materials for supercapacitors.

[1]  Dingshan Yu,et al.  Ternary Hybrids of Amorphous Nickel Hydroxide–Carbon Nanotube‐Conducting Polymer for Supercapacitors with High Energy Density, Excellent Rate Capability, and Long Cycle Life , 2015 .

[2]  Hongsen Li,et al.  NiCo2S4 Nanosheets Grown on Nitrogen‐Doped Carbon Foams as an Advanced Electrode for Supercapacitors , 2015 .

[3]  Jun Yang,et al.  Hybrid NiCo2S4@MnO2 heterostructures for high-performance supercapacitor electrodes , 2015 .

[4]  C. Cao,et al.  Chlorine-doped carbonated cobalt hydroxide for supercapacitors with enormously high pseudocapacitive performance and energy density , 2015 .

[5]  Li Li,et al.  Quantitation of α-Lactalbumin by Liquid Chromatography Tandem Mass Spectrometry in Medicinal Adjuvant Lactose , 2014, International journal of analytical chemistry.

[6]  Y. Wen,et al.  Diverse Melting Modes and Structural Collapse of Hollow Bimetallic Core-Shell Nanoparticles: A Perspective from Molecular Dynamics Simulations , 2014, Scientific Reports.

[7]  H. Fei,et al.  Hydrothermally formed three-dimensional nanoporous Ni(OH)2 thin-film supercapacitors. , 2014, ACS nano.

[8]  Juanjuan Ding,et al.  High supercapacitor and adsorption behaviors of flower-like MoS2 nanostructures , 2014 .

[9]  Xu Li,et al.  Synthesis of amorphous cobalt sulfide polyhedral nanocages for high performance supercapacitors , 2014 .

[10]  Teng Zhai,et al.  Polyaniline and polypyrrole pseudocapacitor electrodes with excellent cycling stability. , 2014, Nano letters.

[11]  W. Schreiner,et al.  Supercapacitor Electrodes Obtained by Directly Bonding 2D MoS2 on Reduced Graphene Oxide , 2014 .

[12]  B. Dunn,et al.  Where Do Batteries End and Supercapacitors Begin? , 2014, Science.

[13]  Yong Li,et al.  Amorphous Fe2O3 as a high-capacity, high-rate and long-life anode material for lithium ion batteries , 2014 .

[14]  J. Chen,et al.  Microwave-assisted synthesis of NiS2 nanostructures for supercapacitors and cocatalytic enhancing photocatalytic H2 production , 2014, Scientific Reports.

[15]  Y. Tong,et al.  Amorphous cobalt hydroxide with superior pseudocapacitive performance. , 2014, ACS applied materials & interfaces.

[16]  Q. Li,et al.  Hierarchical mushroom-like CoNi2S4 arrays as a novel electrode material for supercapacitors , 2014 .

[17]  Yong Ding,et al.  Worm-like amorphous MnO2 nanowires grown on textiles for high-performance flexible supercapacitors , 2014 .

[18]  Nasir Mahmood,et al.  Graphene-based nanocomposites for energy storage and conversion in lithium batteries, supercapacitors and fuel cells , 2014 .

[19]  Dong Su,et al.  Seed-mediated synthesis of core/shell FePtM/FePt (M = Pd, Au) nanowires and their electrocatalysis for oxygen reduction reaction. , 2013, Journal of the American Chemical Society.

[20]  Afriyanti Sumboja,et al.  Large Areal Mass, Flexible and Free‐Standing Reduced Graphene Oxide/Manganese Dioxide Paper for Asymmetric Supercapacitor Device , 2013, Advanced materials.

[21]  Yexiang Tong,et al.  Amorphous nickel hydroxide nanospheres with ultrahigh capacitance and energy density as electrochemical pseudocapacitor materials , 2013, Nature Communications.

[22]  Yanglong Hou,et al.  Nickel sulfide/nitrogen-doped graphene composites: phase-controlled synthesis and high performance anode materials for lithium ion batteries. , 2013, Small.

[23]  Yuanyuan Li,et al.  Construction of high-capacitance 3D CoO@polypyrrole nanowire array electrode for aqueous asymmetric supercapacitor. , 2013, Nano letters.

[24]  M. Chan-Park,et al.  Synthesis of a MnO2–graphene foam hybrid with controlled MnO2 particle shape and its use as a supercapacitor electrode , 2012 .

[25]  G. Muralidharan,et al.  Interconnected V2O5 nanoporous network for high-performance supercapacitors. , 2012, ACS applied materials & interfaces.

[26]  Hao Jiang,et al.  Mesoporous Carbon Incorporated Metal Oxide Nanomaterials as Supercapacitor Electrodes , 2012, Advanced materials.

[27]  X. Zhao,et al.  Conducting Polymers Directly Coated on Reduced Graphene Oxide Sheets as High-Performance Supercapacitor Electrodes , 2012 .

[28]  Lei Zhang,et al.  A review of electrode materials for electrochemical supercapacitors. , 2012, Chemical Society reviews.

[29]  Yi Cui,et al.  Enhancing the supercapacitor performance of graphene/MnO2 nanostructured electrodes by conductive wrapping. , 2011, Nano letters.

[30]  R. Ruoff,et al.  Carbon-Based Supercapacitors Produced by Activation of Graphene , 2011, Science.

[31]  Y. Tong,et al.  Single-crystal ZnO nanorod/amorphous and nanoporous metal oxide shell composites: Controllable electrochemical synthesis and enhanced supercapacitor performances , 2011 .

[32]  A. Best,et al.  Conducting-polymer-based supercapacitor devices and electrodes , 2011 .

[33]  Luzhuo Chen,et al.  Highly flexible and all-solid-state paperlike polymer supercapacitors. , 2010, Nano letters.

[34]  Peihua Huang,et al.  Ultrahigh-power micrometre-sized supercapacitors based on onion-like carbon. , 2010, Nature nanotechnology.

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

[36]  J. Cheon,et al.  Two-dimensional nanosheet crystals. , 2007, Angewandte Chemie.

[37]  T. Pellegrino,et al.  Heterodimers based on CoPt3-Au nanocrystals with tunable domain size. , 2006, Journal of the American Chemical Society.

[38]  M. Winter,et al.  What are batteries, fuel cells, and supercapacitors? , 2004, Chemical reviews.

[39]  Y. Qian,et al.  A Single-source Approach to Metastable Ni3S4 Crystallites and Their Optical Properties , 2004 .

[40]  M. Armand,et al.  Issues and challenges facing rechargeable lithium batteries , 2001, Nature.

[41]  A. Manthiram,et al.  Ambient Temperature Synthesis of Spinel Ni3S4: An Itinerant Electron Ferrimagnet , 1999 .

[42]  B. Conway,et al.  The role and utilization of pseudocapacitance for energy storage by supercapacitors , 1997 .

[43]  S. P. Vincent.  Oxidation--reduction potentials of molybdenum and iron--sulphur centres in nitrate reductase from Escherichia coli. , 1979, The Biochemical journal.

[44]  R. Kuhn.  Über die Befruchtungsstoffe und geschlechtsbestimmenden Stoffe bei Pflanzen und Tieren , 1940 .