MnCo2O4 nanowires were grown on nickel foam by a simple hydrothermal method and a calcination process.Following immersion of the MnCo2O4 precursor in Na2S aqueous solution,S2- reached the outer surface of MnCo2O4,and sulfur replaced the oxygen to form MnCo2S4 to obtain a supercapacitor electrode with MnCo2O4@MnCo2S4 core/shell nanostructure.Field emission scanning electron microscope,transmission electron microscope,X-ray diffraction and X-ray photoelectron spectroscopy were used to characterize the samples.The as-prepared core-shell nanostructure revealed its component advantages and a synergistic effect for electrode materials of supercapacitors.The material can provide a high specific capacitance of 2212.5F/g at a current density of 1A/g,and shown good rate performance in a three-electrode system.After 5000 cycles at a current density of 10A/g,the capacitance retention of this material was 89%,which proved its excellent cycle stability.
Jin Jie, Dai Yatang, Lu Jinghua, Tie Ning
. Study of preparation and supercapacitor performance of MnCo2O4@MnCo2S4 nanocomposite[J]. New Chemical Materials, 2021
, 49(6)
: 188
-191
.
DOI: 10.19817/j.cnki.issn 1006-3536.2021.06.041
[1] Lokhande P E,Chavan U S.Surfactant-assisted cabbage rose-like CuO deposition on Cu foam by for supercapacitor applications[J].Synthesis and Reactivity in Inorganic and Metal-Organic Chemistry,2018,48(9):1-7.
[2] Fang B,Wei Y Z,Kumagai M.Modified carbon materials for high-rate EDLCs application[J].Journal of Power Sources,2006,155(2):487-491.
[3] Liu L,Zhao H,Lei Y.Review on nanoarchitectured current collectors for pseudocapacitors[J].Small Methods,2019,3(8):1800341.
[4] Zhou Y,Guo W,Li T.A review on transition metal nitrides as electrode materials for supercapacitors[J].Ceramics International,2019,45:21062-21076.
[5] Kim H S,Abbas M A,Kang M S,et al.Study of the structure-properties relations of carbon spheres affecting electrochemical performances of EDLCs[J].Electrochimica Acta,2019,304:210-220.
[6] Jing Chuan,Liu Xiaojing,Yao Hongchang,et al.Phase and morphology evolution of CoAl-LDH nanosheets towards advanced supercapacitor applications[J].CrystEngComm,2019,21:4934-4942.
[7] Martínez-Periñán E,Down M P,Gibaja C,et al.Antimonene:a novel 2D nanomaterial for supercapacitor applications[J].Advanced Energy Materials,2018,8(11):1702606.
[8] Wang X,Xu L,Song K,et al.Synthesis of MnCo2O4@MnCo2S4 core/shell micro-nanostructures on Ni foam for high performance asymmetric supercapacitors[J].Colloids and Surfaces A:Physicochemical and Engineering Aspects,2019,570:73-80.
[9] Huang F,Meng R,Sui Y,et al.One-step hydrothermal synthesis of a CoS2@MoS2 nanocomposite for high-performance supercapacitors[J].Journal of Alloys and Compounds,2018,742:844-851.
[10] Zhou J,Han X,Tao K,et al.Shish-kebab type MnCo2O4@Co3O4 nanoneedle arrays derived from MnCo-LDH@ZIF-67 for high-performance supercapacitors and efficient oxygen evolution reaction[J].Chemical Engineering Journal,2018,354:875-884.
[11] Yan Z,Hu L,Zhao S,et al.Preparation of MnCo2O4@Ni(OH)2 core-shell flowers for asymmetric supercapacitor materials with ultrahigh specific capacitance[J].Advanced Functional Materials,2016,26(23):4085-4093.
[12] Yang X,Xu K,Zou R,et al.A hybrid electrode of Co3O4@PPy core/shell nanosheet arrays for high-performance supercapacitors[J].Nano-Micro Letters,2016,8(2):143-150.
[13] 丁卓峰,杨永强,李在均.ZnCo2O4@CoMoO4三维电极的制备及超级电容性能研究[J].化工新型材料,2020.48(2):112-116.
[14] Huang Z H,Song Y,Feng D Y,et al.High mass loading MnO2 with hierarchical nanostructures for supercapacitors[J].ACS Nano,2018,12(4):3557-3567.
