One-pot synthesis of CoxSy nanomaterials for high-performance supercapacitors
In the present work, we report a convenient method for preparing non-stoichiometric cobalt sulfide with one-pot solvothermal method. Different Co x S y nanomaterials are synthesized for supercapacitor application. This experiment explores the influence of ethanol and N , N -dimethylformamide (DMF)...
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Published in | Journal of materials science. Materials in electronics Vol. 33; no. 13; pp. 10013 - 10020 |
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Main Authors | , , , , , , |
Format | Journal Article |
Language | English |
Published |
New York
Springer US
01.05.2022
Springer Nature B.V |
Subjects | |
Online Access | Get full text |
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Summary: | In the present work, we report a convenient method for preparing non-stoichiometric cobalt sulfide with one-pot solvothermal method. Different Co
x
S
y
nanomaterials are synthesized for supercapacitor application. This experiment explores the influence of ethanol and
N
,
N
-dimethylformamide (DMF) on the microstructure and properties of Co
x
S
y
. X-ray diffraction (XRD), scanning electron microscopy, and Brunner–Emmet–Teller (BET) measurements demonstrated that Co
x
S
y
(ethanol) and Co
x
S
y
(DMF) have different structures and morphologies. Electrochemical supercapacitor performance of Co
x
S
y
(ethanol) and Co
x
S
y
(DMF) is characterized via cyclic voltammetry, galvanostatic charge–discharge (GCD), and electrochemical impedance spectroscopy (EIS) measurements. These results show that Co
x
S
y
(DMF) has better electrochemical performance than Co
x
S
y
(ethanol), and its capacitance can reach 347.4 F/g at the current density of 0.5 A/g. Moreover, Co
x
S
y
(DMF) also delivers a better cycling stability of about 70.8% capacity retention after 3000 cycles at a current density of 4 A/g. In addition, the assembled asymmetric supercapacitor of Co
x
S
y
(DMF)//active carbon shows an excellent energy density of 66.4 Wh/kg at a power density of 483.1 W/kg. These results indicate that Co
x
S
y
(DMF) has a good application prospect in the field of supercapacitor. |
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ISSN: | 0957-4522 1573-482X |
DOI: | 10.1007/s10854-022-07992-6 |