Effect of Annealing Atmosphere Induced Crystallite Size Changes on the Electrochemical Properties of TiO2 Nanotubes Arrays

Anwar, Tauseef; Li, Wang; Hussain, Naveed; Chen, Wang; Sagar, Rizwan Ur Rehman

doi:10.17265/2328-2223/2016.02.001

Cited by 2 publications

(1 citation statement)

References 34 publications

(31 reference statements)

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“…47 The difference of the total specific capacities of 60V-NTs and thin-wall NTs is very small, but the capacity of thinwall NTs prevails due to the higher lithium solubility limit in 19 nm crystallites and shorter diffusion length. Anwar et al 61 The depressed semicircle in the higher frequency region of the Nyquist plot originates from the formation of SEI layer. This semicircle is modeled with constant phase element (CPE 1 ) and SEI layer resistance, R SEI , in parallel.…”

Section: Resultsmentioning

confidence: 99%

Large Li-Ion Insertion Capacity of Thin-Wall Anatase TiO₂ Nanotubes at 25 °C–55 °C

Latas,

Cvjetićanin

2023

J. Electrochem. Soc.

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Anatase TiO2 was prepared in the form of nanotube arrays by anodic oxidation of Ti foil followed by annealing at 400°C. Electrochemical experiments, which included cyclic voltammetry (CV), galvanostatic (GS) cycling, and electrochemical impedance spectroscopy (EIS) were conducted in 1M solution of LiClO4 in propylene carbonate at temperatures 25-55°C. CV experiments, at scan rates 5-50 mV•s1, demonstrated with increasing temperature a large increase in the intensity of the redox peaks along with a decrease in the peak-to-peak separation. GS cycling showed large increase of capacity of thin-wall TiO2 nanotubes with increasing temperature, which attains 357 mAh•g1 at 55°C during lithiation at current rate 5.3 C, with capacity retention of 98.5% and Coulombic efficiency of 97.5%. Surface storage and development of secondary voltage plateau strongly contribute to such a large capacity value. EIS showed a multiple decrease in solid electrolyte interphase layer resistance and charge transfer resistance with temperature rising up to 55°C.

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Section: Resultsmentioning

confidence: 99%

Large Li-Ion Insertion Capacity of Thin-Wall Anatase TiO₂ Nanotubes at 25 °C–55 °C

Latas,

Cvjetićanin

2023

J. Electrochem. Soc.

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Solution Processed Hafnia Nanoaggregates: Influence of Surface Oxygen on Catalytic Soot Oxidation

Laishram

Shejale

Gupta

et al. 2018

ACS Sustainable Chem. Eng.

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Hafnium dioxide (HfO2) nanoaggregates are synthesized by sol–gel and hydrothermal routes followed by hydrogen annealing at different time durations. The proposed study aims to explore the effect of hydrogen annealing time on the properties of HfO2 and also envisage the catalytic soot oxidation using HfO2 nanoaggregates. It is observed that annealing under a hydrogen atmosphere brought about substantial changes in certain attributes such as chemical and textural properties with marginal changes in some other properties like optical activity and band gap. The pristine HfO2 without hydrogen annealing showed a lower ignition temperature, whereas hydrogen annealed HfO2 for 2 h showed the best catalytic performance characterized by the soot combustion temperature (T 50) in contrast to samples prepared at longer duration because of the higher surface adsorbed oxygen species in its widely distributed pores.

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Effect of Annealing Atmosphere Induced Crystallite Size Changes on the Electrochemical Properties of TiO2 Nanotubes Arrays

Cited by 2 publications

References 34 publications

Large Li-Ion Insertion Capacity of Thin-Wall Anatase TiO₂ Nanotubes at 25 °C–55 °C

Large Li-Ion Insertion Capacity of Thin-Wall Anatase TiO₂ Nanotubes at 25 °C–55 °C

Solution Processed Hafnia Nanoaggregates: Influence of Surface Oxygen on Catalytic Soot Oxidation

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Effect of Annealing Atmosphere Induced Crystallite Size Changes on the Electrochemical Properties of TiO2 Nanotubes Arrays

Cited by 2 publications

References 34 publications

Large Li-Ion Insertion Capacity of Thin-Wall Anatase TiO2 Nanotubes at 25 °C–55 °C

Large Li-Ion Insertion Capacity of Thin-Wall Anatase TiO2 Nanotubes at 25 °C–55 °C

Solution Processed Hafnia Nanoaggregates: Influence of Surface Oxygen on Catalytic Soot Oxidation

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Large Li-Ion Insertion Capacity of Thin-Wall Anatase TiO₂ Nanotubes at 25 °C–55 °C

Large Li-Ion Insertion Capacity of Thin-Wall Anatase TiO₂ Nanotubes at 25 °C–55 °C