Synthesis of nanoporous graphene and their electrochemical performance in a symmetric supercapacitor

Senthilkumar, E.; Sivasankar, V.; Kohakade, B. Ravindra; Thileepkumar, K.; Ramya, M.; Sundari, G. Sivagaami; Raghu, S.; Kalaivani, R.A.

doi:10.1016/j.apsusc.2017.10.221

Cited by 27 publications

(11 citation statements)

References 28 publications

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“…MoS 2 was grown on nanoporous graphene sponge (NPG) to explore the growth mechanism of MoS 2 on this exceptional substrate with potential applications in battery and supercapacitor technology. [ 60,61 ] A HIM image of bare graphene sponge is presented in Figure a: NPG is a bi‐continuous graphene structure warped into a 3D compact volume, with few hundreds nanometer wide pores, constituted by 1–2 layers of high‐quality 2D graphene, without frayed borders and edges, as recently shown in spectro‐microscopy investigations. [ 62,63 ] Figure 6b,c shows CVD grown MoS 2 with S evaporation temperature of 280 °C (MoS 2 /NPG‐280) and 200 °C (MoS 2 /NPG‐200), respectively.…”

Section: Resultsmentioning

confidence: 86%

2D MoS₂ Heterostructures on Epitaxial and Self‐Standing Graphene for Energy Storage: From Growth Mechanism to Application

Zebardastan

Bradford

Gupta

et al. 2021

Adv Materials Technologies

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Layered molybdenum disulphide (MoS2) crystals in combination with graphene create the opportunity for the development of heterostructures with tailored surface and structural properties for energy storage applications. Herein, 2D heterostructures are developed by growing MoS2 on epitaxial and self‐standing nanoporous graphene (NPG) using chemical vapor deposition (CVD). The effect of substrate as well as different CVD growth parameters such as temperature, amount of sulfur and MoO3 precursors, and argon flow on the growth of MoS2 is systematically investigated. Interestingly, various structures of MoS2 such as monolayer triangular islands, spirals, standing sheets, and irregular stacked multilayered MoS2 are successfully developed. The growth mechanism is proposed using different advanced characterization techniques. The formation of a continuous wetting layer with grain boundaries over the surface prior to formation of any other structures is detected. As a proof of principle, MoS2/NPG is employed for the first time as anode material in potassium ion battery. The electrode delivers a specific capacity of 389 mAh g−1 with over 98% stability after 200 cycles. The porous structures clearly facilitate the ion transport which is beneficial for the ion battery. These encouraging results open new opportunities to develop hierarchical heterostructures of 2D‐materials for next‐generation energy storage technologies.

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Section: Resultsmentioning

confidence: 86%

2D MoS₂ Heterostructures on Epitaxial and Self‐Standing Graphene for Energy Storage: From Growth Mechanism to Application

Zebardastan

Bradford

Gupta

et al. 2021

Adv Materials Technologies

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“…These values exceed those of the ones recently reported for aqueous SCs based on the biomass‐derived and other advanced carbon nanomaterials. [ 22–34 ] Furthermore, the cycling performance of the assembled SC was also evaluated using GCD measurments at a current density of 5 A g −1 . As shown in Figure 6d, 96.9% of capacitance can be retained with almost 100% Coulombic efficiency after the long‐term charging/discharging cycling of 100 000 cycles, indicating a superb cycling stability of the LCM‐900 electrode.…”

Section: Resultsmentioning

confidence: 99%

High‐Performance Aqueous Supercapacitors Based on Biomass‐Derived Multiheteroatom Self‐Doped Porous Carbon Membranes

et al. 2020

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Porous carbons derived from widely accessible, renewable, and low‐cost biomass are being extensively pursued as biocompatible electrode materials for next‐generation supercapacitors (SCs), but their practical application is being largely restricted by insufficient performance related to their powdery status. Herein, a porous carbon membrane (denoted as lettuce‐derived carbon membrane [LCM]) is developed by direct and controllable carbonization of biomass lettuce. By taking the advantages of the inherent microstructure and composition of the lettuce, the as‐fabricated LCM electrode is endowed with a large specific surface area, interconnected hierarchical pores, and multiheteroatom (N, P, and S) doping. The benefits originating from the structure synergy provide this LCM electrode excellent electrochemical performance in an aqueous symmetric SC, exhibiting a high specific capacitance of 213.4 F g−1 at 0.2 A g−1, outstanding rate capability (78.6% capacitance retention at 10 A g−1), and superior cycling stability (96.9% capacitance retention after 100 000 cycles at 5 A g−1) and unit Coulombic efficiency. Notably, the LCM‐based SC delivers the highest energy density of 7.41 Wh kg−1 with a power density of 50.4 W kg−1 at 0.2 A g−1. This device‐compatible porous carbon membrane can be applied to other advanced energy‐storage and conversion devices with a high electrochemical performance.

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“…When designed properly, nanostructures based on graphene can show excellent flexibility, which is an important feature for future flexible gadgets and energy-storage devices [ 33 , 34 ]. Owing to the fast ion transportation, graphene-based SCs can exhibit high power, long stability, and high-energy-density features [ 35 ], by using nonporous graphene electrodes [ 36 , 37 ]. Final properties of graphene-based porous nanostructures, including electrical, mechanical, and microstructural properties, can be easily engineered through the fabrication process [ 27 ].…”

Section: Role Of Graphene-based Nanostructures For Scsmentioning

confidence: 99%

Current Research of Graphene-Based Nanocomposites and Their Application for Supercapacitors

et al. 2020

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This review acmes the latest developments of composites of metal oxides/sulfide comprising of graphene and its analogues as electrode materials in the construction of the next generation of supercapacitors (SCs). SCs have become an indispensable device of energy-storage modes. A prompt increase in the number of scientific accomplishments in this field, including publications, patents, and device fabrication, has evidenced the immense attention they have attracted from scientific communities. These efforts have resulted in rapid advancements in the field of SCs, focusing on the development of electrode materials with features of high performance, economic viability, and robustness. It has been demonstrated that carbon-based electrode materials mixed with metal oxides and sulfoxides can perform extremely well in terms of energy density, durability, and exceptional cyclic stability. Herein, the state-of-the-art technologies relevant to the fabrication, characterization, and property assessment of graphene-based SCs are discussed in detail, especially for the composite forms when mixing with metal sulfide, metal oxides, metal foams, and nanohybrids. Effective synthetic methodologies for the nanocomposite fabrications via intercalation, coating, wrapping, and covalent interactions will be reviewed. We will first introduce some fundamental aspects of SCs, and briefly highlight the impact of graphene-based nanostructures on the basic principle of SCs, and then the recent progress in graphene-based electrodes, electrolytes, and all-solid-state SCs will be covered. The important surface properties of the metal oxides/sulfides electrode materials (nickel oxide, nickel sulfide, molybdenum oxide, ruthenium oxides, stannous oxide, nickel-cobalt sulfide manganese oxides, multiferroic materials like BaMnF, core-shell materials, etc.) will be described in each section as per requirement. Finally, we will show that composites of graphene-based electrodes are promising for the construction of the next generation of high performance, robust SCs that hold the prospects for practical applications.

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Synthesis of nanoporous graphene and their electrochemical performance in a symmetric supercapacitor

Cited by 27 publications

References 28 publications

2D MoS₂ Heterostructures on Epitaxial and Self‐Standing Graphene for Energy Storage: From Growth Mechanism to Application

2D MoS₂ Heterostructures on Epitaxial and Self‐Standing Graphene for Energy Storage: From Growth Mechanism to Application

High‐Performance Aqueous Supercapacitors Based on Biomass‐Derived Multiheteroatom Self‐Doped Porous Carbon Membranes

Current Research of Graphene-Based Nanocomposites and Their Application for Supercapacitors

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Synthesis of nanoporous graphene and their electrochemical performance in a symmetric supercapacitor

Cited by 27 publications

References 28 publications

2D MoS2 Heterostructures on Epitaxial and Self‐Standing Graphene for Energy Storage: From Growth Mechanism to Application

2D MoS2 Heterostructures on Epitaxial and Self‐Standing Graphene for Energy Storage: From Growth Mechanism to Application

High‐Performance Aqueous Supercapacitors Based on Biomass‐Derived Multiheteroatom Self‐Doped Porous Carbon Membranes

Current Research of Graphene-Based Nanocomposites and Their Application for Supercapacitors

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Product

Resources

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2D MoS₂ Heterostructures on Epitaxial and Self‐Standing Graphene for Energy Storage: From Growth Mechanism to Application

2D MoS₂ Heterostructures on Epitaxial and Self‐Standing Graphene for Energy Storage: From Growth Mechanism to Application