Transformation of diffusive to capacitive kinetics in nanoscale modified Co-TiO2@CNTs composites safeguarding steady reversible capacity as sodium-ion battery anode

Ata ur -Rehman; Ghulam Ali; Muhammad Bilal; Muhammad Zahid; Shahid Bashir; Abul Kalam; Javed Iqbal; Muhammad Abdul Qayyum; S. Wageh; Syed Mustansar Abbas

doi:10.1016/j.jallcom.2022.163772

Transformation of diffusive to capacitive kinetics in nanoscale modified Co-TiO₂@CNTs composites safeguarding steady reversible capacity as sodium-ion battery anode

Ata ur -Rehman^*
, Ghulam Ali
, Muhammad Bilal
, Muhammad Zahid
, Shahid Bashir
, Abul Kalam
, Javed Iqbal
, Muhammad Abdul Qayyum
, S. Wageh
, Syed Mustansar Abbas^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

15 Scopus citations

Abstract

The effective diffusion-controlled performance of the SIB anode, Co_xTi_1−xO₂/CNTs, presented here offers high reversible sodium uptake. Kinetic studies of the samples conducted through cyclic voltammetry at various scan rates suggest that by increasing the mass ratio of Co atoms in TiO₂ lattice the mechanism is shifted from a slow diffusive charge contribution to a fast capacitive charge contribution. Partial amorphization of the crystalline TiO₂ diffraction planes revealed by ex-situ XRD along with the attenuation of the crystal lattice reflects the ability of the electrodes for high reversible sodium uptake. The synchronous effect of CNTs and Co loading enhance the porosity with multiple electronic/ionic conducting channels favouring high sodium storage and stability from 109.3 mAh g^–1 in TiO₂ to 168.5 mAh g^–1 in Co_0.03Ti_0.97O₂/CNT electrode after 80 cycles at a current rate of 0.05 C.

Original language	English
Article number	163772
Journal	Journal of Alloys and Compounds
Volume	902
DOIs	https://doi.org/10.1016/j.jallcom.2022.163772
State	Published - 5 May 2022
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2022

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

Carbon nanotubes
Diffusion coefficient
Pseudocapacitive
Sodium-ion battery
TiO

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

Access to Document

10.1016/j.jallcom.2022.163772

Cite this

-Rehman, A. U., Ali, G., Bilal, M., Zahid, M., Bashir, S., Kalam, A., Iqbal, J., Qayyum, M. A., Wageh, S., & Abbas, S. M. (2022). Transformation of diffusive to capacitive kinetics in nanoscale modified Co-TiO₂@CNTs composites safeguarding steady reversible capacity as sodium-ion battery anode. Journal of Alloys and Compounds, 902, Article 163772. https://doi.org/10.1016/j.jallcom.2022.163772

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title = "Transformation of diffusive to capacitive kinetics in nanoscale modified Co-TiO2@CNTs composites safeguarding steady reversible capacity as sodium-ion battery anode",

abstract = "The effective diffusion-controlled performance of the SIB anode, CoxTi1−xO2/CNTs, presented here offers high reversible sodium uptake. Kinetic studies of the samples conducted through cyclic voltammetry at various scan rates suggest that by increasing the mass ratio of Co atoms in TiO2 lattice the mechanism is shifted from a slow diffusive charge contribution to a fast capacitive charge contribution. Partial amorphization of the crystalline TiO2 diffraction planes revealed by ex-situ XRD along with the attenuation of the crystal lattice reflects the ability of the electrodes for high reversible sodium uptake. The synchronous effect of CNTs and Co loading enhance the porosity with multiple electronic/ionic conducting channels favouring high sodium storage and stability from 109.3 mAh g–1 in TiO2 to 168.5 mAh g–1 in Co0.03Ti0.97O2/CNT electrode after 80 cycles at a current rate of 0.05 C.",

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-Rehman, AU, Ali, G, Bilal, M, Zahid, M, Bashir, S, Kalam, A, Iqbal, J, Qayyum, MA, Wageh, S & Abbas, SM 2022, 'Transformation of diffusive to capacitive kinetics in nanoscale modified Co-TiO₂@CNTs composites safeguarding steady reversible capacity as sodium-ion battery anode', Journal of Alloys and Compounds, vol. 902, 163772. https://doi.org/10.1016/j.jallcom.2022.163772

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T1 - Transformation of diffusive to capacitive kinetics in nanoscale modified Co-TiO2@CNTs composites safeguarding steady reversible capacity as sodium-ion battery anode

AU - -Rehman, Ata ur

AU - Ali, Ghulam

AU - Bilal, Muhammad

AU - Zahid, Muhammad

AU - Bashir, Shahid

AU - Kalam, Abul

AU - Iqbal, Javed

AU - Qayyum, Muhammad Abdul

AU - Wageh, S.

AU - Abbas, Syed Mustansar

PY - 2022/5/5

Y1 - 2022/5/5

N2 - The effective diffusion-controlled performance of the SIB anode, CoxTi1−xO2/CNTs, presented here offers high reversible sodium uptake. Kinetic studies of the samples conducted through cyclic voltammetry at various scan rates suggest that by increasing the mass ratio of Co atoms in TiO2 lattice the mechanism is shifted from a slow diffusive charge contribution to a fast capacitive charge contribution. Partial amorphization of the crystalline TiO2 diffraction planes revealed by ex-situ XRD along with the attenuation of the crystal lattice reflects the ability of the electrodes for high reversible sodium uptake. The synchronous effect of CNTs and Co loading enhance the porosity with multiple electronic/ionic conducting channels favouring high sodium storage and stability from 109.3 mAh g–1 in TiO2 to 168.5 mAh g–1 in Co0.03Ti0.97O2/CNT electrode after 80 cycles at a current rate of 0.05 C.

AB - The effective diffusion-controlled performance of the SIB anode, CoxTi1−xO2/CNTs, presented here offers high reversible sodium uptake. Kinetic studies of the samples conducted through cyclic voltammetry at various scan rates suggest that by increasing the mass ratio of Co atoms in TiO2 lattice the mechanism is shifted from a slow diffusive charge contribution to a fast capacitive charge contribution. Partial amorphization of the crystalline TiO2 diffraction planes revealed by ex-situ XRD along with the attenuation of the crystal lattice reflects the ability of the electrodes for high reversible sodium uptake. The synchronous effect of CNTs and Co loading enhance the porosity with multiple electronic/ionic conducting channels favouring high sodium storage and stability from 109.3 mAh g–1 in TiO2 to 168.5 mAh g–1 in Co0.03Ti0.97O2/CNT electrode after 80 cycles at a current rate of 0.05 C.

KW - Carbon nanotubes

KW - Diffusion coefficient

KW - Pseudocapacitive

KW - Sodium-ion battery

KW - TiO

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