Electrostatically Charged MoS2 /Graphene Oxide Hybrid Composites for Excellent Electrochemical Energy Storage Devices

ACS Applied Materials & Interfaces
Mao-Cheng LiuYu-Lun Chueh

Abstract

We demonstrate, for the first time, a new method of fabricating hybrid MoS2/poly(ethyleneimine)-modified graphene oxide (PEI-GO) composites assembled through electrostatically charged interaction between the negatively charged MoS2 nanosheets and positively charged PEI-GO in an aqueous solution. The GO can not only improve the electronic conductivity of the MoS2/PEI-GO composites, leading to an excellent charge-transfer network, but also hamper the restacking of MoS2 nanosheets. The composition ratios between MoS2 and PEI-GO were also optimized with the highest specific capacitance of 153.9 F g-1 where 96.0% of the initial specific capacitance remains after 6800 cycles. The specific capacitance of only 117.5 F g-1 was observed for the pure MoS2 nanosheets, and 68.2% of the initial specific capacitance was achieved after 5000 cycles. The excellent electrochemical performance of the hybrid MoS2/PEI-GO composites was demonstrated by establishing an asymmetric supercapacitor with a MoS2/PEI-GO-based negative electrode and an activated-carbon positive electrode. The asymmetric supercapacitor provided a maximum capacitance of 42.9 F g-1, and 93.1% of the initial capacitance was maintained after 8000 cycles. Furthermore, a MoS2/PEI-GO...Continue Reading

References

Oct 21, 2011·Nano Letters·Jacopo BrivioAndras Kis
Jun 20, 2012·Chemical Communications : Chem Comm·Watcharop ChaikittisilpKatsuhiko Ariga
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Apr 11, 2015·ACS Nano·Marcus A WorsleyChristine A Orme
Jul 22, 2015·ACS Applied Materials & Interfaces·Mark A BissettRobert A W Dryfe

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Citations

Jul 3, 2021·Nanomaterials·Konthoujam James SinghHao-Chung Kuo
Aug 12, 2021·Dalton Transactions : an International Journal of Inorganic Chemistry·Zhishuo YanHao Lei
Dec 8, 2021·ACS Applied Materials & Interfaces·Robert Ilango PushparajXiaodong Hou

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