Electrochemical Studies of Microwave Synthesised Bimetallic Sulfides Nanostructures As Faradaic Electrodes

被引:14
作者
Bello, A. [1 ]
Fashedemi, O. O. [2 ]
Momodu, D. Y. [1 ]
Barzegar, F. [1 ]
Masikhwa, T. M. [1 ]
Madito, M. J. [1 ]
Taghizadeh, F. [1 ]
Dangbegnon, J. K. [1 ]
Manyala, N. [1 ]
机构
[1] Univ Pretoria, SARCHI Chair Carbon Technol & Mat, Inst Appl Mat, Dept Phys, ZA-0028 Pretoria, South Africa
[2] Univ Pretoria, Dept Chem, ZA-0002 Pretoria, South Africa
基金
新加坡国家研究基金会;
关键词
Microwave technique; binary metal oxides; sheet-like structure; faradaic electrodes; electrochemical properties; NICO2S4 NANOTUBE ARRAYS; ENERGY-STORAGE; ION BATTERIES; NICKEL FOAM; PERFORMANCE; DESIGN; GROWTH; URCHIN;
D O I
10.1016/j.electacta.2015.06.072
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
A microwave irradiation method has been used to prepare mixed nickel cobalt sulfide (NixCoyS4) nanosheets with different stoichiometric composition as electrodes for electrochemical capacitors. This study has been undertaken to determine the effect of synthesis time and concentration of nickel on the morphology and pseudocapacitance behavior of the NixCoyS4. It was observed that the time had an effect on the morphology of NixCoyS4, producing sheet-like (leaf-like) morphology which curls in flower-like shapes with increase in growth (synthesis) time. The effect of morphology on the electrochemical behavior was studied by cyclic voltammetry (CV), chronopotentiometry (CP) and electrochemical impedance spectroscopy (EIS) techniques in aqueous solutions. The sample with a concentration ratio of 2:1 of nickel and cobalt (NixCoyS4-(3)) shows higher faradaic performance when compared to other samples grown under similar conditions but with different ratios. The maximum specific capacitance values obtained for was 1110 Fg(-1) at a scan rate of 5 mV s(-1) for this sample. The Coulombic efficiency of the sample was similar to 80% after 2000 galvanostatic charge-discharge cycles at a current density of 5A g(-1). Crown Copyright (C) 2015 Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码:778 / 786
页数:9
相关论文
共 31 条
  • [1] Nanostructured materials for advanced energy conversion and storage devices
    Aricò, AS
    Bruce, P
    Scrosati, B
    Tarascon, JM
    Van Schalkwijk, W
    [J]. NATURE MATERIALS, 2005, 4 (05) : 366 - 377
  • [2] Facile synthesis of loaf-like ZnMn2O4 nanorods and their excellent performance in Li-ion batteries
    Bai, Zhongchao
    Fan, Na
    Sun, Changhui
    Ju, Zhicheng
    Guo, Chunli
    Yang, Jian
    Qian, Yitai
    [J]. NANOSCALE, 2013, 5 (06) : 2442 - 2447
  • [3] Microwave assisted synthesis of MnO2 on nickel foam-graphene for electrochemical capacitor
    Bello, A.
    Fashedemi, O. O.
    Fabiane, M.
    Lekitima, J. N.
    Ozoemena, K. I.
    Manyala, N.
    [J]. ELECTROCHIMICA ACTA, 2013, 114 : 48 - 53
  • [4] One-pot synthesis of porous nickel cobalt sulphides: tuning the composition for superior pseudocapacitance
    Chen, Haichao
    Jiang, Jianjun
    Zhao, Yuandong
    Zhang, Li
    Guo, Danqing
    Xia, Dandan
    [J]. JOURNAL OF MATERIALS CHEMISTRY A, 2015, 3 (01) : 428 - 437
  • [5] In situ growth of NiCo2S4 nanotube arrays on Ni foam for supercapacitors: Maximizing utilization efficiency at high mass loading to achieve ultrahigh areal pseudocapacitance
    Chen, Haichao
    Jiang, Jianjun
    Zhang, Li
    Xia, Dandan
    Zhao, Yuandong
    Guo, Danqing
    Qi, Tong
    Wan, Houzhao
    [J]. JOURNAL OF POWER SOURCES, 2014, 254 : 249 - 257
  • [6] Highly conductive NiCo2S4 urchin-like nanostructures for high-rate pseudocapacitors
    Chen, Haichao
    Jiang, Jianjun
    Zhang, Li
    Wan, Houzhao
    Qi, Tong
    Xia, Dandan
    [J]. NANOSCALE, 2013, 5 (19) : 8879 - 8883
  • [7] One-Step Electrodeposited Nickel Cobalt Sulfide Nanosheet Arrays for High-Performance Asymmetric Supercapacitors
    Chen, Wei
    Xia, Chuan
    Alshareef, Husam N.
    [J]. ACS NANO, 2014, 8 (09) : 9531 - 9541
  • [8] Cathodic Deposition of Flaky Nickel Sulfide Nanostructure as an Electroactive Material for High-Performance Supercapacitors
    Chou, Shu-Wei
    Lin, Jeng-Yu
    [J]. JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2013, 160 (04) : D178 - D182
  • [9] Template-mediated growth of microsphere, microbelt and nanorod α-MoO3 structures and their high pseudo-capacitances
    Cui, Zhiming
    Yuan, Weiyong
    Li, Chang Ming
    [J]. JOURNAL OF MATERIALS CHEMISTRY A, 2013, 1 (41) : 12926 - 12931
  • [10] Electrical Energy Storage for the Grid: A Battery of Choices
    Dunn, Bruce
    Kamath, Haresh
    Tarascon, Jean-Marie
    [J]. SCIENCE, 2011, 334 (6058) : 928 - 935