Nano nickel oxide coated graphene/polyaniline composite film with high electrochemical performance for flexible supercapacitor

Wu, Xinming; Wang, Qiguan; Zhang, Wenzhi; Wang, Yan; Chen, Weixing

doi:10.1016/j.electacta.2016.06.026

Cited by 85 publications

(26 citation statements)

References 49 publications

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“…This result can be attributed to the poorer wettability and ion conductivity of the PVA/H 2 SO 4 gel electrolyte compared to H 2 SO 4 solution. However, the areal capacitance of our device is still higher than previously reported flexible supercapacitors based on graphene woven fabric PANi film (23 mF cm −2 ) [36] , graphite/PANi networks (77.8 mF cm −2 ), graphene/PANi micro-supercapacitors (3.31 mF cm −2 ) [37] , Cellulose nanofiber/PANi-RGO (5.86 mF cm −2 ) [38] and comparable to that of graphene/PANi/graphene sandwich paper (107 mF cm −2 ) [39] , NiO-GNS/PANi (112 mF cm −2 ) [40] , CNT/PANi hydrogel (186 mF cm −2 ) [41] . Energy density and power density have been calculated based on the areal capacitance of PANi-GP-900.…”

Section: Resultsmentioning

confidence: 95%

A flexible solid-state supercapacitor based on graphene/polyaniline paper electrodes

Liu

Chen

et al. 2019

Journal of Energy Chemistry

105

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Section: Resultsmentioning

confidence: 95%

A flexible solid-state supercapacitor based on graphene/polyaniline paper electrodes

Liu

Chen

et al. 2019

Journal of Energy Chemistry

105

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“…11 A few of graphene-based ternary composites with PANI and metal oxides have been prepared via hydrothermal treatment. 54,55 Hydrothermal treatment is often a preferred method to prepare the electrode materials as the morphology of the composites produced can be tailored by controlling the temperature reaction. 56 As reported by Zhu et al, 39 RGO/PANI/copper oxide ternary hydrogels were fabricated via in situ polymerization followed by hydrothermal treatment at ambient temperature that displayed high specific capacitance of 634.4 F/g at 1.0 A/g current density.…”

Section: Graphene/pani/metal Oxidementioning

confidence: 99%

Graphene-based ternary composites for supercapacitors

2018

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Summary The research on electrode materials for supercapacitor application continues to evolve as the request of high‐energy storage system has increased globally due to the demand for energy consumption. Over the past decades, various types of carbon‐based materials have been employed as electrode materials for high‐performance supercapacitor application. Among them, graphene is 1 of the most widely used carbon‐based materials due to its excellent properties including high surface area and excellent conductivity. To exploit more of its interesting properties, graphene is tailored to produce graphene oxide and reduced graphene oxide to improve the dispersibility in water and easy to be incorporated with other materials to form binary composites or even ternary composites. Nowadays, ternary composites have attracted enormous interest as 2 materials (binary composites) cannot satisfy the requirement of the high‐performance supercapacitor. Thus, many approaches have been employed to fabricate ternary composites by combining 3 different types of electroactive materials for high‐performance supercapacitor application. This review focuses on the supercapacitive performance of graphene‐based ternary composites with different types of active materials, ie, conducting polymers, metal oxide, and other carbon‐based materials.

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“…2a revealed a strong graphitic C1s peak at around 285 eV and an obvious O1s peak at around 533 eV, confirming the existence of oxygen-containing groups, such as hydroxy/epoxy groups. [27][28][29] XPS also showed the characteristic P2p peak and Mg1s peak at around 131 eV and 1230 eV, respectively, thereby providing evidence for the successful integration of Mg-P. High-resolution XPS of C1s and their deconvolution are shown in Figs. 2b-2d.…”

Section: Resultsmentioning

confidence: 99%

Natural Organic Phytate Modified Graphene Hydrogel for Flexible Supercapacitor Electrodes

Jia

et al. 2017

J. Electrochem. Soc.

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A simple and template-free method for fabrication of a modified porous graphene hydrogel electrode was developed. The method involved adding natural organic phytate in the pure graphene hydrogels. Benefiting from the introduced phosphate groups and positively charged metal ions, the flexible magnesium phytate/graphene (Mg-P/G) hydrogel electrode showed large specific capacitance of 281 F/g with a small charge transfer resistance of 0.3 . Furthermore, the flexible supercapacitor showed prominent cycling stability (about 100% retention in capacitance over 10000 cycles) and excellent mechanical flexibility (about 97.5% of its original capacitance after 500 bending cycles Graphene materials have gained considerable interest in flexible energy devices because of their unique and fascinating characteristics, especially for chemically modified graphenes (such as graphene oxide (GO) and reduced graphene oxide (rGO)).1,2 These graphene sheets also frequently have higher conductivities, much larger specific surface areas, and can be used as electrodes/active materials for flexible supercapacitor (SC).3-6 However, owing to its strong π-π stacking, rGO sheets tend to cause irreversible agglomeration or even restack to form graphite.7 Thus, the assembly and regulation of GO is a crucial factor in electrochemistry. Most research has focused on graphene-based composites with polymers, 8,9 inorganic nanoparticles, 10-12 or other carbon materials including activated carbon 13 and carbon nanotubes 14,15 to extend their functions. 3D architectures of graphene (such as graphene aerogels and hydrogels) have been frequently designed.16-20 Yet a few obstacles still need to be overcome for commercialization. For example, further improving graphene-based electrodes' mechanical flexibility, cycle stability, and searching for a safe, low-cost, renewable, and environment friendly nanomaterials to modify 3D porous graphene structures.Natural organic phytate, derived from legume seeds, cereal grains, and corn, is a nontoxic, eco-friendly, abundant, and readily available resource. 21 Phytate has six phosphate groups located symmetrically on a cyclohexane ring, which is viable for interacting with positively charged metal ions (such as Ca 2+ , Mg 2+ , Zn 2+ , etc.) and can attach to the surface of GO sheets to form a network structure through hydrogen-bond interaction.2 Based on these properties, we chose one of these positively charged metal ions (Mg 2+ ) to prepare a perforated magnesium phytate (Mg-P). The oxygen atoms in the phosphate groups and GO sheets can act as coordination atoms to chelate with metal ions (Mg 2+ ). Mg-P molecules can provide a variety of viable cross-linking sites through π-π and hydrogen-bond interaction that may "stitch" two or more GO sheets to form 3D assemblies.A major challenge in the regulation of 3D porous magnesium phytate/graphene (Mg-P/G) hydrogel requires a certain concentration and proportion of Mg-P to GO that form a stably network. Herein, we report a simple method for modifying graphene hydrogel. As e...

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Nano nickel oxide coated graphene/polyaniline composite film with high electrochemical performance for flexible supercapacitor

Cited by 85 publications

References 49 publications

A flexible solid-state supercapacitor based on graphene/polyaniline paper electrodes

A flexible solid-state supercapacitor based on graphene/polyaniline paper electrodes

Graphene-based ternary composites for supercapacitors

Natural Organic Phytate Modified Graphene Hydrogel for Flexible Supercapacitor Electrodes

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