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Caption : fig. s1 photograph of the thiourea, pth, pristine mos2, mos2-10 aqueous dispersions and mos2-10 

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Caption : fig. s2 raman spectra of the pristine mos2 and e-mos2.

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Caption : fig. s3 xps survey spectra of the pristine mos2 and e-mos2.

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Caption : fig. s4 field-emission scanning electron microscope (fesem) images for the (a) pristine mos2, (c) mos2-5, (e) mos2-10, and (g) mos2-15 in low magnification and the (b) pristine mos2, (d) mos2-5, (f) mos2-10, and (h) mos2-15 in high magnification.

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Caption : fig. s5 top view for the adsorption sites and the corresponding adsorption energies (ead) of nh4+ and scn- on the mos2 nanosheet. (a) scn-(vertical)-s; (b) scn-(vertical)-mo; (c) scn-(vertical)-center; (d) nh4+(vertical)-mo; (e) nh4+(vertical)-s; (f) nh4+(vertical)-center; (g) scn-(horizontal)-center; (h) nh4scn (horizontal)-center; (i) h(horizontal)-s.

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Caption : fig. s6 the element mapping images of the mos2-10.

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Caption : fig. s7 cv curves of (a) the pristine mos2, (b) mos2-5 and (c) mos2-15 at various scan rates in three electrodes system.

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Caption : fig. s8. gcd curves of (a) the pristine mos2, (b) mos2-5 and (c) mos2-15 at various current densities in three electrodes system.

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Caption : fig. s9 specific capacitance derived from cv curves for the pristine mos2 and e-mos2 at various scan rates in three electrodes system.

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Caption : fig. s10 the relationship between the specific capacitance and the interlayer spacing for the pristine mos2 and e-mos2 microflowers in three electrodes system. 

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Caption : fig. s11 nyquist plots of the pristine mos2 and e-mos2 at open circuit voltage in three electrodes system.

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Caption : fig. s12 specific capacitance of the symmetric supercapacitor based on mos2-10 electrode at various scan rates.

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Caption : fig. s13. nyquist plots of symmetric supercapacitor based on mos2-10 electrode at open circuit voltage.