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Expanding Interlayer Spacing in MoS2 for Realizing an Advanced Supercapacitor AITranslate

Debasish Sarkar; Debanjan Das; Shyamashis Das; Ankit Kumar; Satish Patil; Karuna Kar Nanda; D. D. Sarma; Ashok Shukla;
Malaviya National Institute of Technology Jaipur; Indian Institute of Science; Indian Institute of Science; Indian Institute of Science; Indian Institute of Science; Indian Institute of Science; Indian Institute of Science; Indian Institute of Science
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Publisher: ACS
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Abstract AITranslate

Charge-storage mechanism of free-standing MoS2/r-GO (r-GO = reduced graphene oxide) hybrid nanoflakes on molybdenum (Mo) foil in Na2SO4 solution is elucidated for realizing a high-performance asymmetric supercapacitor (ASC). Thiourea that acts primarily as sulfur source also helps intercalating ammonium ions, which along with r-GO facilitate in situ exfoliation of MoS2, producing hierarchical MoS2 with expanded interlayer spacing. This interlayer expansion in MoS2 facilitates Na+-ions intercalation/deintercalation and ensures enhanced capacitance, rate capability, and cycling stability of the capacitor. Besides exhibiting attractive energy-cum-power traits, the 2 V MoS2/r-GO//Fe2O3/MnO2 ASC shows compelling cycling performance for over 20 000 cycles in an aqueous electrolyte.

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DOI：https://doi.org/10.1021/acsenergylett.9b00983

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Citation Information:

Charge-storage mechanism of free-standing MoS2/r-GO (r-GO = reduced graphene oxide) hybrid nanoflakes on molybdenum (Mo) foil in Na2SO4 solution is elucidated for realizing a high-performance asymmetric supercapacitor (ASC). Thiourea that acts primarily as sulfur source also helps intercalating ammonium ions, which along with r-GO facilitate in situ exfoliation of MoS2, producing hierarchical MoS2 with expanded interlayer spacing. This interlayer expansion in MoS2 facilitates Na+-ions intercalation/deintercalation and ensures enhanced capacitance, rate capability, and cycling stability of the capacitor. Besides exhibiting attractive energy-cum-power traits, the 2 V MoS2/r-GO//Fe2O3/MnO2 ASC shows compelling cycling performance for over 20 000 cycles in an aqueous electrolyte.

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GB/T 7714-2015 [1] Debasish Sarkar, Debanjan Das, Shyamashis Das, et al. ACS Energy Letters, 2019(4). DOI:10.1021/acsenergylett.9b00983.
MLA [1] Debasish Sarkar, et al., ACS Energy Letters, no. 4, 2019, https://doi.org/10.1021/acsenergylett.9b00983.
APA [1] Debasish Sarkar, Debanjan Das, Shyamashis Das, Ankit Kumar, Satish Patil, Karuna Kar Nanda, D. D. Sarma, & Ashok Shukla. (2019). ACS Energy Letters(4). https://doi.org/10.1021/acsenergylett.9b00983
IEEE [1] Debasish Sarkar, Debanjan Das, Shyamashis Das, Ankit Kumar, Satish Patil, Karuna Kar Nanda, D. D. Sarma, and Ashok Shukla, ACS Energy Letters, no. 4, 2019, doi: 10.1021/acsenergylett.9b00983.