Deposition of binder-free oxygen-vacancies NiCo2O4 based films with hollow microspheres via solution precursor thermal spray for supercapacitors

Ma, Yangmin; Yu, Zebin; Liu, Meimei; Song, Caixia; Huang, Xuanning; Molière, Michel; Song, Guowen; Liao, Hanlin

doi:10.1016/j.ceramint.2019.02.145

Cited by 21 publications

(5 citation statements)

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“…After that, sequential evaporation of the solvent from the surface of the substrate, heating to precipitate out the solute, high-temperature annealing, formation of microporous particles, and finally, sintering of solid particles is carried out [214]. NiCo 2 O 4 nanostructures with morphologies hollow nanosphere [215], hollow microspheres [216], dried plum-like particles [217], yolk-shell microspheres [218], nanoaggregates [219], thin films with uniform particle distribution size 20-30 nm [220], etc. are reported (Fig.…”

Section: Spray Pyrolysis Methodsmentioning

confidence: 99%

NiCo2O4 Nano-/Microstructures as High-Performance Biosensors: A Review

Kumar¹

2020

Nano-Micro Lett.

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Non-enzymatic biosensors based on mixed transition metal oxides are deemed as the most promising devices due to their high sensitivity, selectivity, wide concentration range, low detection limits, and excellent recyclability. Spinel NiCo2O4 mixed oxides have drawn considerable attention recently due to their outstanding advantages including large specific surface area, high permeability, short electron, and ion diffusion pathways. Because of the rapid development of non-enzyme biosensors, the current state of methods for synthesis of pure and composite/hybrid NiCo2O4 materials and their subsequent electrochemical biosensing applications are systematically and comprehensively reviewed herein. Comparative analysis reveals better electrochemical sensing of bioanalytes by one-dimensional and two-dimensional NiCo2O4 nano-/microstructures than other morphologies. Better biosensing efficiency of NiCo2O4 as compared to corresponding individual metal oxides, viz. NiO and Co3O4, is attributed to the close intrinsic-state redox couples of Ni3+/Ni2+ (0.58 V/0.49 V) and Co3+/Co2+ (0.53 V/0.51 V). Biosensing performance of NiCo2O4 is also significantly improved by making the composites of NiCo2O4 with conducting carbonaceous materials like graphene, reduced graphene oxide, carbon nanotubes (single and multi-walled), carbon nanofibers; conducting polymers like polypyrrole (PPy), polyaniline (PANI); metal oxides NiO, Co3O4, SnO2, MnO2; and metals like Au, Pd, etc. Various factors affecting the morphologies and biosensing parameters of the nano-/micro-structured NiCo2O4 are also highlighted. Finally, some drawbacks and future perspectives related to this promising field are outlined.

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Section: Spray Pyrolysis Methodsmentioning

confidence: 99%

NiCo2O4 Nano-/Microstructures as High-Performance Biosensors: A Review

Kumar¹

2020

Nano-Micro Lett.

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“…Peak II corresponded to the oxygen of hydroxide (O–H), and the area of the hydroxyl group peak was associated with surface defects and oxygen vacancies . Peak III at 531.9 eV was attributed to considerable defects sites with low oxygen coordination bond, which indicated much greater amount of oxygen defects existing in the reduction sample by comparing the intensities of the both groups …”

Section: Resultsmentioning

confidence: 99%

Study of TiO₂-Coated α-Fe₂O₃ Composites and the Oxygen-Defects Effect on the Application as the Anode Materials of High-Performance Li-Ion Batteries

Zhang

Cai

et al. 2020

ACS Appl. Energy Mater.

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TiO 2 -coated Fe 2 O 3 composites exhibiting high electrochemical stability with oxygen defects were synthesized as the anode materials of Li-ion batteries using an easy sol−gel method. The industrial submicron-sized Fe 2 O 3 with no special shape and commercial tetrabutyl titanate were adopted as raw materials. The phase structures, morphologies, and elements distribution on the surface were characterized by X-ray diffraction analysis, electron paramagnetic resonance, scanning electron microscopy, X-ray photoelectron spectroscopy, and so forth. Results indicated that TiO 2 was well coated on the surface of raw Fe 2 O 3 with an average thickness of 5.5 nm, and the oxygen defects were successfully introduced into the composites with the reduction treatment. Electrochemical characterization indicated that TiO 2 coating was beneficial to the cycle performance of Fe 2 O 3 . The coating layer significantly improved the electronic conductivity and cycling stability of the Fe 2 O 3 anode material, as theoretically supported by the density functional theory calculation. Moreover, the introduction of oxygen defects in samples resulted in more excellent cycling stability compared to that in samples without reduction. The reduced Fe 2 O 3 @0.2TiO 2 sample exhibited a specific discharge capacity of 405.6 mA h•g −1 after 150 cycles, which effectively improved the intrinsic cycling performance of Fe 2 O 3 , and a corresponding discharge capacity of 50 mA h•g −1 after 30 cycles.

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“…The electrochemical measurements including multistep cyclic voltammetry (CV) and galvanic charge/discharge test (GCD) were conducted in 1 M KOH solution within a potential window from −0.2 to 0.6 V using the symmetrical twoelectrode system. The specific capacitance (C s ) of each active materials was calculated from GCD curves at different current densities using the following equation ( 1) [49,50],:…”

Section: Electrodes Fabrication and Electrochemical Measurementsmentioning

confidence: 99%

High-performance asymmetric supercapacitor based hierarchical NiCo₂O₄@ carbon nanofibers//Activated multichannel carbon nanofibers

et al. 2020

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Synthesis of rational nanostructure design of hybrid materials including uniformly growing, stable and highly porous structures have received a great deal of attention for many energy storage applications. In this study, the positive electrode of the uniform distribution of NiCo 2 O 4 nanorods anchored on carbon nanofibers has been successfully prepared by in-situ growth under the hydrothermal process. Whereas, the activated multichannel carbon nanofibers (AMCNFs) have been fabricated via electrospinning followed by alkaline activation as the negative electrode. The crystal phase, morphological structure for the proposed electrode materials were characterized by x-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Moreover, the electrochemical behaviors were investigated using cyclic voltammetry (CV), galvanostatic charge and discharge (GCD) and electrochemical impedance spectroscopy (EIS) measurements. Compared to the neat CNFs and the pristine NiCo 2 O 4 , the NiCo 2 O 4 @CNFs hybrid electrodes showed better electrochemical performance and achieved a high specific capacitance up to 649 F g −1 at a current density of 3 A g −1 . The optimized NiCo 2 O 4 @CNFs//AMCNFs asymmetric device achieved a high energy density of 38.5 Wh kg −1 with a power density of 1.6 kW kg −1 and possessed excellent recyclability with 93.1% capacitance retention over 6000 charging/discharging cycles. Overall, the proposed study introduces a facile strategy for the robust design of hybrid structured as effective nanomaterials based electrode for high-performance electrochemical supercapacitors.

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Deposition of binder-free oxygen-vacancies NiCo2O4 based films with hollow microspheres via solution precursor thermal spray for supercapacitors

Cited by 21 publications

References 60 publications

NiCo2O4 Nano-/Microstructures as High-Performance Biosensors: A Review

NiCo2O4 Nano-/Microstructures as High-Performance Biosensors: A Review

Study of TiO₂-Coated α-Fe₂O₃ Composites and the Oxygen-Defects Effect on the Application as the Anode Materials of High-Performance Li-Ion Batteries

High-performance asymmetric supercapacitor based hierarchical NiCo₂O₄@ carbon nanofibers//Activated multichannel carbon nanofibers

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Deposition of binder-free oxygen-vacancies NiCo2O4 based films with hollow microspheres via solution precursor thermal spray for supercapacitors

Cited by 21 publications

References 60 publications

NiCo2O4 Nano-/Microstructures as High-Performance Biosensors: A Review

NiCo2O4 Nano-/Microstructures as High-Performance Biosensors: A Review

Study of TiO2-Coated α-Fe2O3 Composites and the Oxygen-Defects Effect on the Application as the Anode Materials of High-Performance Li-Ion Batteries

High-performance asymmetric supercapacitor based hierarchical NiCo2O4@ carbon nanofibers//Activated multichannel carbon nanofibers

Contact Info

Product

Resources

About

Study of TiO₂-Coated α-Fe₂O₃ Composites and the Oxygen-Defects Effect on the Application as the Anode Materials of High-Performance Li-Ion Batteries

High-performance asymmetric supercapacitor based hierarchical NiCo₂O₄@ carbon nanofibers//Activated multichannel carbon nanofibers