Abstract
Flower-like MoS2modified with carbon nanospheres (CNS) displays energy-storage capability when used as an aqueous symmetric pseudocapacitor.
Highlights
Soon and Loh[13] have pointed out the use of MoS2 as an electrode material for supercapacitors, and the results suggest that the supercapacitor performance of MoS2 is comparable to that of carbon nanotube (CNT) array electrodes
The value of the d-spacing of the s-MoS2 shown in the transmission electron microscopy (TEM) image (Fig. 1i) is 0.62 nm, which is in agreement with literature.[23]
It seems that the carbon nanospheres (CNS) particles acted as substrates for nucleation, wherein MoO4À ions reacted with sulphur ions from L-cysteine to form the MoS2 sheets on the
Summary
Analogous to Ru in RuO2, the Mo central atom displays a range of oxidation states from +2 to +6 This plays an important role in enhancing charge storage capabilities.[14] the electronic conductivity of MoS2 is still lower compared to graphite and the speci c capacitance of MoS2 is still very limited when used alone for energy storage applications.[12,13,15] As evident in several reports, there is the need to improve the capacitance of MoS2 with conductive materials such as CNT,[12] polyaniline (PANI),[2] polypyrrole (PPy),[9] and reduced graphene (RGO).[11] In a review by Marquez et al.,[16] carbon nanospheres (CNS) were described as good candidates for catalytic and adsorption applications and their unclosed graphitic akes provide the necessary ‘dangling bonds’ that could enhance surface reactions. CNS has been used to enhance the conductivity of the battery cathode material, LiFePO4.17
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