Mechanically delaminated few layered MoS2 nanosheets based high performance wire type solid-state symmetric supercapacitors

Krishnamoorthy, Karthikeyan; Pazhamalai, Parthiban; Veerasubramani, Ganesh Kumar; Kim, Sang‐Jae

doi:10.1016/j.jpowsour.2016.04.116

Cited by 197 publications

(67 citation statements)

References 64 publications

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“…Further, the device showed a capacitance retention of about 61.11 % even at a ten‐fold increase in current density suggesting the better rate capability of the device as seen from Figure (D). The Columbic efficiency, specific energy and power density, and cyclic stability are some of importance parameters for the practical applications of supercapacitor devices ,. The Ni‐HCF∥graphene device showed a Columbic efficiency of higher than 98 % for all the charge‐discharge profiles measured at different current densities (given in Figure S5 in the supporting document) highlighting their better capacitive properties.…”

Section: Resultsmentioning

confidence: 97%

A High‐Energy Aqueous Sodium‐Ion Capacitor with Nickel Hexacyanoferrate and Graphene Electrodes

et al. 2017

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Sodium‐ion capacitors have received much attention compared to lithium‐based systems, owing to the improved safety and earth abundancy. Here, we assembled an aqueous sodium‐ion capacitor by using nickel hexacyanoferrate and graphene as positive and negative electrodes, respectively, in 1 M Na2SO4 electrolyte. The fabricated capacitor can work in a wide potential window from 0 to 2 V, giving an energy density of 39.35 Wh kg−1 with better capacitance retention of about 91 %, even after 2000 cycles. Besides, the cost‐effective precursors as well as environmentally friendly and earth‐abundant electrolytes with high safety will ensure that the fabricated sodium‐ion capacitor system is suitable for next‐generation energy storage applications.

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Section: Resultsmentioning

confidence: 97%

A High‐Energy Aqueous Sodium‐Ion Capacitor with Nickel Hexacyanoferrate and Graphene Electrodes

et al. 2017

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“…[15][16][17] MoS 2 can store charge based on the ions intercalation into the layers of MoS 2 accompanied by a faradaic charge-transfer. This mechanism can be termed as intercalation pseudocapacitance.…”

Section: -14mentioning

confidence: 99%

“…[15][16][17][18][19] The nearly symmetrical redox peaks are indicative of high reversibility of the insertion/extration process. As is well known, the specic capacitance is proportional to the area of the CV curves.…”

Section: Electrochemical Performance Of the Sample Electrodesmentioning

confidence: 99%

Hierarchical MoS₂ microspheres prepared through a zinc ion-assisted hydrothermal route as an electrochemical supercapacitor electrode

Rujiralai

et al. 2017

RSC Adv.

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a Hierarchical molybdenum disulfide microspheres have been successfully prepared through a zinc ionassisted hydrothermal route followed by an acid corrosion strategy. It is found that the MoS 2 microspheres comprised of numerous nanosheets with few-layered feature exhibit a 3D flower-like morphology. It is believed that the MoS 2 /ZnS composites can act as a precursor for the formation of hierarchical MoS 2 microspheres. Additionally, the electrochemical properties of the as-prepared MoS 2 microspheres as an electrode material for supercapacitors have also been investigated. Compared with the MoS 2 nanosheet, the resultant MoS 2 microsphere demonstrates superior pseudcapacitive properties including high specific capacitance, good cycling and rate capability, which could be credited to its novel hierarchical architecture feature.

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“…[53] Briefly, the electroactive material (MoSe 2 ), carbon black, and PVDF in the ratio of 85:10:5 were ground using NMP as a dispersant in an agate mortar until a uniform slurry was formed. [53] Briefly, the electroactive material (MoSe 2 ), carbon black, and PVDF in the ratio of 85:10:5 were ground using NMP as a dispersant in an agate mortar until a uniform slurry was formed.…”

Section: Methodsmentioning

confidence: 99%

A High Efficacy Self‐Charging MoSe₂ Solid‐State Supercapacitor Using Electrospun Nanofibrous Piezoelectric Separator with Ionogel Electrolyte

Pazhamalai

Krishnamoorthy

Mariappan

et al. 2018

Adv Materials Inter

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compartments, namely, (i) energy harvesting and (ii) energy storage in which the former generates the energy while the latter is used to store the generated energy. [6,7] Renewable energy sources such as solar, wind, hydropower, mechanical energy (piezoelectric/triboelectric nanogenerator), and electrochemical energy (fuel cells) are used as energy harvesting system, whereas batteries and supercapacitors are used as energy storing system in the design of selfcharging power system. [8][9][10][11][12] Renewable power source based self-charging power system such as coupling of the solar cell/ photovoltaics with the electrochemical energy storage are commercialized for making use of the photon energy into useful energy. [13,14] Hitherto, the utilization of biomechanical energy for the selfcharging system is still in research level, and further efforts are needed to be undertaken for practical applications. The concept of self-charging and/or self-powered system for harvesting and storing mechanical and/or biomechanical energy becomes plausible after the research findings of Wang and co-workers for the first time when they designed a self-powered system using nanogenerator (NG) and supercapacitor in 2012. [2] Up to date two different types of self-charging power cells have been reported such as (i) external powering and (ii) internally integrating the system. [8,[15][16][17] In the former case, the mechanical energy harvester is externally connected to the energy storage device using a rectifier, whereas the latter uses an all-in-one integrated system which will be beneficial for several applications in portable and wearable devices due to their miniaturized size. [18,19] The pulsating alternating current output of nanogenerator is the major concern for the practical application of NG based self-charging power cells (SCPCs) due to their low energy conversion efficiency. [7,20] Therefore, the design and development of high-performance self-charging power cell with high energy conversion efficiency are highly essential. In this scenario, integrated self-charging supercapacitor power cell (SCSPC) utilizing supercapacitor as energy storage device attracts much attention compared to batteries mainly due to the fast charging rates of a capacitive type electrode; it can scavenge/store the piezo-electrochemically generated Self-charging supercapacitor power cell (SCSPC) received much attention for harvesting and storing energy in an integrated device, which paves the way for developing maintenance free autonomous power systems for various electronic devices. In this work, a new type of SCSPC device is fabricated comprising 2D molybdenum di-selenide (MoSe 2 ) as an energy storing electrode with polyvinylidene fluoride-co-hexafluoropropylene/ tetraethylammonium tetrafluoroborate (PVDF-co-HFP/TEABF 4 ) ion gelled polyvinylidene fluoride/sodium niobate (PVDF/NaNbO 3 ) as the piezopolymer electrolyte. The fabricated SCSPC delivers a specific capacitance of 18.93 mF cm −2 with a specific energy of 37.90 mJ cm −2 at a specific power...

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Mechanically delaminated few layered MoS2 nanosheets based high performance wire type solid-state symmetric supercapacitors

Cited by 197 publications

References 64 publications

A High‐Energy Aqueous Sodium‐Ion Capacitor with Nickel Hexacyanoferrate and Graphene Electrodes

A High‐Energy Aqueous Sodium‐Ion Capacitor with Nickel Hexacyanoferrate and Graphene Electrodes

Hierarchical MoS₂ microspheres prepared through a zinc ion-assisted hydrothermal route as an electrochemical supercapacitor electrode

A High Efficacy Self‐Charging MoSe₂ Solid‐State Supercapacitor Using Electrospun Nanofibrous Piezoelectric Separator with Ionogel Electrolyte

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Mechanically delaminated few layered MoS2 nanosheets based high performance wire type solid-state symmetric supercapacitors

Cited by 197 publications

References 64 publications

A High‐Energy Aqueous Sodium‐Ion Capacitor with Nickel Hexacyanoferrate and Graphene Electrodes

A High‐Energy Aqueous Sodium‐Ion Capacitor with Nickel Hexacyanoferrate and Graphene Electrodes

Hierarchical MoS2 microspheres prepared through a zinc ion-assisted hydrothermal route as an electrochemical supercapacitor electrode

A High Efficacy Self‐Charging MoSe2 Solid‐State Supercapacitor Using Electrospun Nanofibrous Piezoelectric Separator with Ionogel Electrolyte

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Hierarchical MoS₂ microspheres prepared through a zinc ion-assisted hydrothermal route as an electrochemical supercapacitor electrode

A High Efficacy Self‐Charging MoSe₂ Solid‐State Supercapacitor Using Electrospun Nanofibrous Piezoelectric Separator with Ionogel Electrolyte