Silver particle-loaded nickel oxide nanosheet arrays on nickel foam as advanced binder-free electrodes for aqueous asymmetric supercapacitors

Wu, Shuxing; Hui, Kwan San; Hui, Kwun Nam; Yun, Jinwon; Kim, Kwang Ho

doi:10.1039/c7ra06252d

Cited by 18 publications

(10 citation statements)

References 41 publications

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“…Several metal oxide nanoparticles, (such as MFe 2 O 4 , Fe 3 O 4 , RuO 2 , MnO 2 , etc.) have been investigated extensively to construct pseudocapacitors. − However, their supercapacitive performance often suffers from their poor conductivity. ,− For example, MnO 2 exhibits a specific capacitance value of ∼150 F g –1 within a potential window of <1 V in aqueous electrolytes . Several types of materials, such as carbon-based materials (porous carbon, activated carbon, carbon nanotube, graphene, etc.…”

Section: Introductionmentioning

confidence: 99%

Ag–Ni Nanoparticle Anchored Reduced Graphene Oxide Nanocomposite as Advanced Electrode Material for Supercapacitor Application

Chandel

Makkar

Ghosh

2019

ACS Appl. Electron. Mater.

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We have reported the electrochemical properties of the nanocomposites that were synthesized by immobilizing nanoparticles of Ag and Ni on the surface of reduced graphene oxide (RGO). The hierarchical structure derived from the combination of nanoparticles of Ni, Ag, and RGO in the (Ag x Ni(1–x)) y RGO(100–y) nanocomposite provides a synergistic effect in the enhancement of supercapacitive performance of the synthesized nanocomposite. (Ag0.50Ni0.50)90RGO10 showed a high specific capacitance value of 897 F g–1 at a current density 1 A g–1 and an energy density of 80 Wh kg–1 at 400 W kg–1 power density. This nanocomposite also exhibited ∼77% retention of the initial capacitance even after 4000 cycles. To the best of our knowledge, the electrochemical properties of the nanocomposite composed of Ni and Ag nanoparticles and RGO are reported for the first time, and the nanocomposite (Ag0.50Ni0.50)90RGO10 demonstrated its excellent supercapacitive performance.

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Section: Introductionmentioning

confidence: 99%

Ag–Ni Nanoparticle Anchored Reduced Graphene Oxide Nanocomposite as Advanced Electrode Material for Supercapacitor Application

Chandel

Makkar

Ghosh

2019

ACS Appl. Electron. Mater.

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“…65-2901). 57 , 58 A well-defined sharp peak indicates the higher crystallinity of the synthesized NiO NPs. Hence, crystallite sizes of NPs were estimated using the Debye–Scherrer formula.…”

Section: Resultsmentioning

confidence: 99%

Bioinspired NiO Nanospheres: Exploring In Vitro Toxicity Using Bm-17 and L. rohita Liver Cells, DNA Degradation, Docking, and Proposed Vacuolization Mechanism

et al. 2022

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The present work demonstrated a novel Cleome simplicifolia -mediated green fabrication of nickel oxide nanoparticles (NiO NPs) to explore in vitro toxicity in Bm-17 and Labeo rohita liver cells. As-fabricated bioinspired NiO NPs were characterized by several analytical techniques. X-ray diffraction (XRD) revealed a crystalline face-centered-cubic structure. Fourier transform infrared spectroscopy (FTIR), ultraviolet–visible diffuse reflectance spectroscopy (UV-DRS), Raman spectroscopy, and X-ray photoelectron spectroscopy (XPS) confirmed NiO formation. The chemical composition was confirmed by energy-dispersive X-ray spectroscopy (EDS) and X-ray photoelectron spectroscopy. Brunauer–Emmett–Teller (BET) revealed the mesoporous nature. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) revealed the formation of 97 nm diameter nanospheres formed due to the congregation of 10 nm size particles. Atomic force microscopy (AFM) revealed the nearly isotropic behavior of NiO NPs. Further, a molecular docking study was performed to explore their toxicity by binding with genetic molecules, and it was found that the docking energy was about −9.65284 kcal/mol. On evaluating the in vitro toxicity of NiO NPs for Bm-17 cells, the study showed that when cells were treated with a high concentration of NPs, cells were affected severely by toxicity, while at a lower concentration, cells were affected slightly. Further, on using 50 μg/mL, quick deaths of cells were observed due to the formation of more vacuoles in the cells. The DNA degradation study revealed that NiO NPs are significantly responsible for DNA degradation. For further confirmation, trypan blue assay was observed for cell viability, and morphological assessment was performed using inverted tissue culture microscopy. Further, the cytotoxicity of NiO NPs in L. rohita liver cells was studied. No toxicity was observed at 1 mg/L of NiO NPs; however, when the concentration was 30 and 90 mg/L, dark and shrank hepatic parenchyma was observed. Hence, the main cause of cell lysis is the increased vacuolization in the cells. Thus, the present study suggests that the cytotoxicity induced by NiO NPs could be used in anticancer drugs.

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“…Numerous laboratory results demonstrate the potential of graphene in transforming the landscape of current electrochemical energy storage devices (EESDs) . The unprecedented properties of graphene have led to massive research efforts on other 2D materials for this application, such as transition‐metal oxides/hydroxides, transition‐metal dichalcogenides (TMDs), hexagonal boron nitride (h‐BN), and transition‐metal carbides and nitrides (MXenes) . In a 2D material, the atomic organization and bond strength along the two dimensions are analogous and significantly stronger than those in a third dimension .…”

Section: Introductionmentioning

confidence: 99%

2D Black Phosphorus: from Preparation to Applications for Electrochemical Energy Storage

Wu¹,

Hui

Hui³

2018

Advanced Science

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140

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Black phosphorus (BP) is rediscovered as a 2D layered material. Since its first isolation in 2014, 2D BP has triggered tremendous interest in the fields of condensed matter physics, chemistry, and materials science. Given its unique puckered monolayer geometry, 2D BP displays many unprecedented properties and is being explored for use in numerous applications. The flexibility, large surface area, and good electric conductivity of 2D BP make it a promising electrode material for electrochemical energy storage devices (EESDs). Here, the experimental and theoretical progress of 2D BP is presented on the basis of its preparation methods. The structural and physiochemical properties, air instability, passivation, and EESD applications of 2D BP are discussed systemically. Specifically, the latest research findings on utilizing 2D BP in EESDs, such as lithium‐ion batteries, supercapacitors, and emerging technologies (lithium–sulfur batteries, magnesium‐ion batteries, and sodium‐ion batteries), are summarized. On the basis of the current progress, a few personal perspectives on the existing challenges and future research directions in this developing field are provided.

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Silver particle-loaded nickel oxide nanosheet arrays on nickel foam as advanced binder-free electrodes for aqueous asymmetric supercapacitors

Cited by 18 publications

References 41 publications

Ag–Ni Nanoparticle Anchored Reduced Graphene Oxide Nanocomposite as Advanced Electrode Material for Supercapacitor Application

Ag–Ni Nanoparticle Anchored Reduced Graphene Oxide Nanocomposite as Advanced Electrode Material for Supercapacitor Application

Bioinspired NiO Nanospheres: Exploring In Vitro Toxicity Using Bm-17 and L. rohita Liver Cells, DNA Degradation, Docking, and Proposed Vacuolization Mechanism

2D Black Phosphorus: from Preparation to Applications for Electrochemical Energy Storage

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