Gelatin-assisted co-exfoliation of graphene nanoplatelets/MoS<sub>2</sub>for high-performance supercapacitors

Abbas, Zahir; Tiwari, Pranav; Kumar, Viresh; Mobin, Shaikh M.

doi:10.1039/d2se00653g

Cited by 6 publications

(10 citation statements)

References 80 publications

(92 reference statements)

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“…There is no significant loss observed with 99.99% retention of its initial specific capacitance, indicating superior rate capability and sustainability of the electrode material, that is, CoNi nanoflowers. [73,74] These results verify that the synthesized material has excellent cyclic stability after 10 000 cycles. The primary reason to get such excellent cyclic retention is due to the interconnected CoNi nanoflowers which facilitated a shorter diffusion path length and succeeded in readily electrolyte penetration.…”

Section: Electrochemical Studies and Effect In Different Electrolyte ...supporting

confidence: 67%

Insights on Effect of Different Electrolytes on Electrochemical Performance of CoNi Nanoflower‐Based Supercapacitors

2023

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Bimetallic materials show superior properties over monometallic systems due to their synergistic effect. Herein, bimetallic CoNi nanoflowers are synthesized by a simple method and characterized via various characterization techniques such as powder X‐ray diffraction (PXRD), scanning electron microscopy, high‐resolution transmission electron microscopy, X‐ray photoelectron spectroscopy, etc. PXRD results confirm the formation of face‐centered cubic CoNi nanoflowers and morphological studies confirm the flower‐like structure of CoNi. Bimetallic CoNi nanoflowers utilized for supercapacitor applications and the effect of electrolyte cations (K+, Na+, Li+) are studied. The results reveal that LiOH shows excellent capacitance of 729.52 F g−1 (66.83 mAh g−1) at 1 A g−1. The cyclic stability of CoNi nanoflower is estimated as ≈100% after 10 000 cycles which signifies the exceptional long‐term utility of the electrode for practical application. Further, the asymmetric device is fabricated which shows the capacitance of 66.61 F g−1 and the commercial light‐emitting diode (1.8 V) delivers high energy density and power density, that is, 18.13 Wh kg−1 at 699.84 W kg−1. The nanoflower exhibits battery–supercapacitor‐type behavior with rapid charge/discharge capability with a binder‐free and additive‐free approach.

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Section: Electrochemical Studies and Effect In Different Electrolyte ...supporting

confidence: 67%

Insights on Effect of Different Electrolytes on Electrochemical Performance of CoNi Nanoflower‐Based Supercapacitors

2023

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“…19 Further, the MOFs derived hierarchical carbon-based hybrid structures as electrocatalysts for energy conversion systems because they expose more active sites for the adsorption of reactive species and better durability under harsh conditions and subsequent electrocatalytic processes. 20−23 However, researchers explored various affordable electrode materials such as graphene/MoS 2 , 24 conducting polymers, 25 metal oxides, 26 MOFs, coordination polymers, and covalent organic frameworks which are used to improve the efficiency of electrocatalysts and supercapacitor electrodes with high durability. 27 Yu et al utilized a pristine Cu coordination polymer for a supercapacitor with higher specific capacitance.…”

Section: ■ Introductionmentioning

confidence: 99%

“…However, researchers explored various affordable electrode materials such as graphene/MoS 2 , conducting polymers, metal oxides, MOFs, coordination polymers, and covalent organic frameworks which are used to improve the efficiency of electrocatalysts and supercapacitor electrodes with high durability . Yu et al.…”

Section: Introductionmentioning

confidence: 99%

Cu-Metal Organic Framework Derived Multilevel Hierarchy (Cu/Cu_xO@NC) as a Bifunctional Electrode for High-Performance Supercapacitors and Oxygen Evolution Reaction

et al. 2023

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The development of a MOFs-derived multilevel hierarchy in a single step still remains a challenging task. Herein, we have synthesized novel Cu-MOF via a slow diffusion method at ambient temperature and further utilized it as a precursor source for MOF-derived multilevel hierarchy (Cu/Cu x O@NC, x = 1 and 2). This studies suggest that the organic ligands served as a source of an N-doped carbon matrix encapsulated with metal oxide nanoparticles which were confirmed by various characterization techniques; further BET analysis reveals a surface area of 178.46 m2/g. The synthesized multilevel hierarchy was utilized as an electro-active material in a supercapacitor that achieved a specific capacitance of 546.6 F g–1 at a current density of 1 A g–1 with a higher cyclic retention of 91.81% after 10 000 GCD cycles. Furthermore, the ASC device was fabricated using Cu/Cu x O@NC as the positive electrode and carbon black as the negative electrode and utilized to enlighten the commercially available LED bulb. The fabricated ASC device was further employed for a two-electrode study which achieved a specific capacitance of 68 F g–1 along with a comparable energy density of 13.6 Wh kg–1. Furthermore, the electrode material was also explored for the oxygen evolution reaction (OER) in an alkaline medium with a low overpotential of 170 mV along with a Tafel slope of 95 mV dec–1 having long-term stability. The MOF-derived material has high durability, chemical stability, and efficient electrochemical performance. This work provides some new thoughts for the design and preparation of a multilevel hierarchy (Cu/Cu x O@NC) via a single precursor source in a single step and explored multifunctional applications in energy storage and an energy conversion system.

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“…16−19 For example, Han et al 20 designed an independent core−shell heterostructure supported on carbon nanotube fibers by anchoring MoS 2 nanosheets on nanowires (MoS 2 @TiN/CNTF) as the anode of AASCs, which has great advantages in wearable water-based SCs. Abbas et al 21 reported "one-step" liquid phase coexfoliation of graphene (G) and MoS 2 together, i.e., graphene nanoplatelet (GNP)/MoS 2 using high-temperature ultrasonication and gelatin. GNP/MoS 2 nanosheets showed specific capacitance and excellent cycling stability.…”

Section: ■ Introductionmentioning

confidence: 99%

“…MoS 2 /C with monolayers has been proven to be a promising material for a wide range of energy storage applications including supercapacitors (SCs) and secondary batteries. − SCs combine the technical characteristics of common capacitors and secondary batteries, providing higher specific energy than common capacitors, higher specific power than secondary batteries, and longer cycle life. − For example, Han et al designed an independent core–shell heterostructure supported on carbon nanotube fibers by anchoring MoS 2 nanosheets on nanowires (MoS 2 @TiN/CNTF) as the anode of AASCs, which has great advantages in wearable water-based SCs. Abbas et al reported “one-step” liquid phase coexfoliation of graphene (G) and MoS 2 together, i.e., graphene nanoplatelet (GNP)/MoS 2 using high-temperature ultrasonication and gelatin. GNP/MoS 2 nanosheets showed specific capacitance and excellent cycling stability.…”

Section: Introductionmentioning

confidence: 99%

Mesoporous Iron Family Element (Fe, Co, Ni) Molybdenum Disulfide/Carbon Nanohybrids for High-Performance Supercapacitors

Yao,

Zhang,

Zhang

et al. 2023

Inorg. Chem.

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As the demand for fuel continues to increase, the development of energy devices with excellent performance is crucial. Supercapacitors (SCs) are attracting attention for their advantages of high specific energy and a long cycle life. At present, the development of high-performance electrode materials is the main point for research and development of SCs. Transition metal sulfides have the advantages of a large interlayer space and high theoretical capacity, making them promising electrode materials. Herein, we reported a series of ultrathin mesoporous iron family element (Fe, Co, Ni) molybdenum disulfide (M x Mo 1−x S 2 /C, M = Fe, Co, and Ni) by a template method. The original monolayer mesoporous structure of MoS 2 /C was maintained, and accumulation and agglomeration of MoS 2 /C were avoided. Based on our investigations, the best performance was that of Co x Mo 1−x S 2 /C nanohybrids. Furthermore, the concentrations of Co and Mo ions were modulated to obtain the best performance, in which Mo and Co ions were released at 1:1, 1:2, and 1:3 ratios and they were named Co x Mo 1−x S 2 /C-1, Co x Mo 1−x S 2 /C-2, and Co x Mo 1−x S 2 /C-3, respectively. Overall, these materials represent a significant improvement and show promise as high-performance SC electrode materials due to their enhanced capacitance and stability. At a current density of 0.5 A g −1 , Co x Mo 1−x S 2 /C-2 has the optimal specific capacitance of 184 F g −1 . Co x Mo 1−x S 2 /C-2 as an SC electrode exhibited better reversible capacity and cycling stability than MoS 2 /C, which is an improvement over MoS 2 /C regarding reversible capacity and cycling stability.

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Gelatin-assisted co-exfoliation of graphene nanoplatelets/MoS₂for high-performance supercapacitors

Abstract: Co-exfoliated GNP/MoS2 was synthesized in one step and used for supercapacitor study.

Cited by 6 publications

References 80 publications

Insights on Effect of Different Electrolytes on Electrochemical Performance of CoNi Nanoflower‐Based Supercapacitors

Insights on Effect of Different Electrolytes on Electrochemical Performance of CoNi Nanoflower‐Based Supercapacitors

Cu-Metal Organic Framework Derived Multilevel Hierarchy (Cu/Cu_xO@NC) as a Bifunctional Electrode for High-Performance Supercapacitors and Oxygen Evolution Reaction

Mesoporous Iron Family Element (Fe, Co, Ni) Molybdenum Disulfide/Carbon Nanohybrids for High-Performance Supercapacitors

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Gelatin-assisted co-exfoliation of graphene nanoplatelets/MoS2for high-performance supercapacitors

Abstract: Co-exfoliated GNP/MoS2 was synthesized in one step and used for supercapacitor study.

Cited by 6 publications

References 80 publications

Insights on Effect of Different Electrolytes on Electrochemical Performance of CoNi Nanoflower‐Based Supercapacitors

Insights on Effect of Different Electrolytes on Electrochemical Performance of CoNi Nanoflower‐Based Supercapacitors

Cu-Metal Organic Framework Derived Multilevel Hierarchy (Cu/CuxO@NC) as a Bifunctional Electrode for High-Performance Supercapacitors and Oxygen Evolution Reaction

Mesoporous Iron Family Element (Fe, Co, Ni) Molybdenum Disulfide/Carbon Nanohybrids for High-Performance Supercapacitors

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Product

Resources

About

Gelatin-assisted co-exfoliation of graphene nanoplatelets/MoS₂for high-performance supercapacitors

Cu-Metal Organic Framework Derived Multilevel Hierarchy (Cu/Cu_xO@NC) as a Bifunctional Electrode for High-Performance Supercapacitors and Oxygen Evolution Reaction