Atomic layer deposition of titanium oxide and nitride on vertically aligned carbon nanotubes for energy dense 3D microsupercapacitors

Zhang, Hayley; Wang, Ben; Brown, Billyde

doi:10.1016/j.apsusc.2020.146349

Cited by 15 publications

(9 citation statements)

References 30 publications

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“…In contrast, during the nitridation process, there could be a large number of O atoms replaced with N atoms, which thereby promotes the formation of a substantial number of Ti–N lattices leading to the crystallization of titanium nitride in the host-TiO 2 system . Notably, this in situ formation of Ti–N often leads to the formation of a cubic-TiN, since it is one of the most thermodynamically stable crystal structures of TiN phase to be formed in the lattices of the host-TiO 2 . , Based on these insights, a plausible crystal structure of the Ti-oxynitride phase is depicted in Figure c. Notably, the obtained refinement structural parameters associated with lattice constants, bond length, and bond angle of Ti–O and Ti–N in the tetragonal TiO 2 anatase phase and cubic TiN phase are consistent with the literature-reported values (see Table S1).…”

Section: Resultsmentioning

confidence: 99%

Phase Engineering of Titanium Oxynitride System and Its Solar Light-Driven Photocatalytic Dye Degradation, H₂ Generation, and N₂ Fixation Properties

Ravikumar,

Quach,

Urupalli

et al. 2023

ACS Sustainable Chem. Eng.

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In the present work, a phase engineering strategy is explored toward forming a titanium oxynitride (TiO x N y ) phase by nitriding a sol–gel-derived TiO2-based precursor at different nitridation temperatures ranging from 450 °C to 950 °C in an ammonia gas environment. The evolved Ti-oxynitride phase is confirmed using XRD, Rietveld refinement, micro-Raman, and HRTEM lattice fringes analysis. Various physicochemical properties of the Ti-oxynitride phase are investigated in comparison with the Ti-oxide and nitride phases obtained in this study. The XPS analysis of oxynitride phase shows dual +3/+4 oxidation states of Ti, which can be attributed to Ti–N and Ti–O network in the oxynitride system. The optical absorption and band gap energy of Ti-oxynitride are found to be favorably altered, compared to the typical Ti-oxides, which are attributed to the plasmonic material-like feature of Ti-nitride phase in the system. From the time-resolved photoluminescence spectra, lifetime of the excited carriers in oxide, nitride, and oxynitride systems is estimated to be ∼3.89, 3.83, and 4.59 ns, respectively, which ascribed to the Ohmic-interface-driven improved electron delocalization in oxynitride phase and corroborated with various photoelectrochemical analysis using voltammetry (cyclic and linear sweep), impedance, and photocurrent measurements. The photocatalytic dye degradation (expressed as a percentage), H2 evolution (in units of μmol g–1 h–1) and NH3 formation (in units of μmol g–1 h–1) over the developed Ti-oxynitride system (∼91–96/1278.2/215) is found to be improved compared to the sole oxide (∼85–88/458.6/102) and nitride (∼79–77/619.32/174) systems. The UV–visible light to H2 conversion efficiency of the developed oxynitride system is estimated to be ∼2.55%. The manifested improved photocatalytic efficiency of oxynitride could be attributed to the synergy of oxide-nitride phases facilitating the effective light harvesting properties via plasmonic features and inter/intratransfer of charge carriers in the system via Ohmic contacts, which eventually promote the multifacet redox reactions toward various photocatalytic applications, as demonstrated in this study.

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Section: Resultsmentioning

confidence: 99%

Phase Engineering of Titanium Oxynitride System and Its Solar Light-Driven Photocatalytic Dye Degradation, H₂ Generation, and N₂ Fixation Properties

Ravikumar,

Quach,

Urupalli

et al. 2023

ACS Sustainable Chem. Eng.

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“…The newly prepared MWCNTs/FeNi 3 /PANI ternary composites have high specific capacitance (398.1 F/g), large energy and power density (9.1 and 500 W/kg, respectively), and good cycle performance (80.9% capacity retention after 2000 charge–discharge cycles). Zhang et al 149 developed a simple fabrication method of symmetrical TiN‐TiO 2 ‐VACNT 3D micro supercapacitor device synthesized by atomic layer deposition (ALD). Among them, atomic layer deposition (ALD) is used to deposit conformal pseudocapacitive coatings of titanium oxide (TiO 2 ) and titanium nitride (TiN) onto vertically aligned carbon nanotubes (VACNT) grown by CVD.…”

Section: Ternary Complexmentioning

confidence: 99%

Carbon nanomaterials and their composites for supercapacitors

2022

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As a type of energy storage device between traditional capacitors and batteries, the supercapacitor has the advantages of energy saving and environmental protection, high power density, fast charging and discharging speed, long cycle life, and so forth. One of the key factors affecting the performance of supercapacitor is the electrode material. Carbon materials, such as carbon nanotube, graphene, activated carbon, and carbon nanocage, are most widely concerned in the application of supercapacitors. The synergistic effect of composites can often obtain excellent results, which is one of the common strategies to increase the electrochemical performance of supercapacitors. To further improve the performance of binary composites, it is a relatively simple method to increase the components as the "bridge" between the two materials to form the ternary composites. The review mainly introduces the current research progress of supercapacitors with pure carbon nanomaterials and multistage carbon nanostructures (composites) as electrodes. The characteristics and application directions of different pure carbon nanomaterials are introduced in detail. Different ways of multilevel structure (material) composite have their own effects on the development of high-performance supercapacitors. We also highlight the recent advances related to these fields and provide our insight into high-energy supercapacitors.

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“…The fabrication process for the VACNT MSC devices was described in detail in a previous study . Two interdigitated electrodes (IDEs) consisted of five fingers each, totaling 10 interdigital fingers for the 3D MSC device.…”

Section: Methodsmentioning

confidence: 99%

“…The fabrication process for the VACNT MSC devices was described in detail in a previous study. 25 Two interdigitated electrodes (IDEs) consisted of five fingers each, totaling 10 interdigital fingers for the 3D MSC device. The dimension of each finger is 0.5 mm by 4.5 mm, and the interdigitated spacing between the fingers is 0.5 mm.…”

Section: Methodsmentioning

confidence: 99%

Aerosol-Jet-Printed CoFe₂O₄ Nanoparticle − Vertically Aligned Carbon Nanotube Composite for Microsupercapacitors

2021

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This work studied the design, fabrication, and characterization of a bimetallic CoFe 2 O 4 nanoparticle (NP) − vertically aligned carbon nanotube (VACNT) composite for 3D microsupercapacitor (MSC) electrodes and devices. Aerosol jet printing (AJP) was used to deposit CoFe 2 O 4 NPs onto planar interdigitated VACNT electrodes, and because of its high resolution (∼10 μm linewidth) and computeraided design feature, it is capable of fabricating both symmetric and asymmetric CoFe 2 O 4 -VACNT 3D MSC devices. The study investigated varying the number of print passes (5, 10, and 15) and the device configuration (symmetric and asymmetric) to improve the electrochemical performance of printed CoFe 2 O 4 -VACNT 3D MSCs. Asymmetric CoFe 2 O 4 -VACNT MSCs with 10 print passes showed a high voltage window in an aqueous electrolyte (∼1.76 V) and increased area-specific capacitance by 13× at .23 mA cm −2 compared to the uncoated VACNT MSC device. It was the best performing device based on the parameters studied because of a combination of optimal composite morphology and device configuration resulting in an area-specific energy and power density increase of 43× and 15×, respectively (vs uncoated VACNT MSC). This study highlighted the benefits of AJP as a novel method for depositing a pseudocapacitive coating onto nanostructured 3D MSC electrodes.

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Atomic layer deposition of titanium oxide and nitride on vertically aligned carbon nanotubes for energy dense 3D microsupercapacitors

Cited by 15 publications

References 30 publications

Phase Engineering of Titanium Oxynitride System and Its Solar Light-Driven Photocatalytic Dye Degradation, H₂ Generation, and N₂ Fixation Properties

Phase Engineering of Titanium Oxynitride System and Its Solar Light-Driven Photocatalytic Dye Degradation, H₂ Generation, and N₂ Fixation Properties

Carbon nanomaterials and their composites for supercapacitors

Aerosol-Jet-Printed CoFe₂O₄ Nanoparticle − Vertically Aligned Carbon Nanotube Composite for Microsupercapacitors

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Atomic layer deposition of titanium oxide and nitride on vertically aligned carbon nanotubes for energy dense 3D microsupercapacitors

Cited by 15 publications

References 30 publications

Phase Engineering of Titanium Oxynitride System and Its Solar Light-Driven Photocatalytic Dye Degradation, H2 Generation, and N2 Fixation Properties

Phase Engineering of Titanium Oxynitride System and Its Solar Light-Driven Photocatalytic Dye Degradation, H2 Generation, and N2 Fixation Properties

Carbon nanomaterials and their composites for supercapacitors

Aerosol-Jet-Printed CoFe2O4 Nanoparticle − Vertically Aligned Carbon Nanotube Composite for Microsupercapacitors

Contact Info

Product

Resources

About

Phase Engineering of Titanium Oxynitride System and Its Solar Light-Driven Photocatalytic Dye Degradation, H₂ Generation, and N₂ Fixation Properties

Phase Engineering of Titanium Oxynitride System and Its Solar Light-Driven Photocatalytic Dye Degradation, H₂ Generation, and N₂ Fixation Properties

Aerosol-Jet-Printed CoFe₂O₄ Nanoparticle − Vertically Aligned Carbon Nanotube Composite for Microsupercapacitors