Wheeler-Jones, Evé, Loveridge, Melanie and Walton, Richard I. (2021) Data for Investigating the influence of synthesis route on the crystallinity and rate capability of niobium pentoxide for energy storage. [Dataset]

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Abstract

Orthorhombic niobium pentoxide (T-Nb2O5) is known to be an effective anode material for Li-ion batteries (LIBs) with very high rate capability, but the other Nb2O5 polymorphs and non-crystalline phases have lacked thorough exploration. A simple hydrothermal mechanism is used to produce an anisotropically crystalline ‘as-synthesised material’, which has not previously been characterised electrochemically. The as-synthesised material is heat-treated to produce T-Nb2O5 at 600°C and monoclinic (H-) Nb2O5 at 1000°C. We present electrochemical properties for all of these materials. Collectively we report rate sweeps and demonstrate high current stability (20 C-rate capability) and a long life span, up to 200 cycles. We propose the H-phase as a high rate anode when prepared via an anisotropically crystalline precursor, as it is able to demonstrate 60 % capacity retention after 200 cycles at a notably high current flux of 20 C. Such high rates results are rare for this material without integration with carbon materials. For the anisotropically crystalline Nb2O5 material, we achieve cycling rates up to 100 C with 80% capacity recovery upon current reduction, representing an important discovery in the development of very high rate anode materials.

Item Type:	Dataset
Subjects:	Q Science > QD Chemistry
Divisions:	Faculty of Science, Engineering and Medicine > Science > Chemistry Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group)
Library of Congress Subject Headings (LCSH):	Anisotropy, Niobium oxide -- Synthesis, Crystallization
Publisher:	University of Warwick, Warwick Manufacturing Group
Official Date:	3 August 2021
Dates:	Date Event 3 August 2021 Published 2 August 2021 Available 2 August 2021 Created
Status:	Not Peer Reviewed
Publication Status:	Published
Media of Output (format):	.txt
Access rights to Published version:	Open Access (Creative Commons)
Description:	All data are Text format and are labelled according to the specific samples in the figures in the paper and supplementary information. Refer Readme file for more information on data.
Date of first compliant deposit:	2 August 2021
Date of first compliant Open Access:	3 August 2021
RIOXX Funder/Project Grant:	Project/Grant ID RIOXX Funder Name Funder ID EP/N509796/1 [EPSRC] Engineering and Physical Sciences Research Council http://dx.doi.org/10.13039/501100000266 EP/N509796/1 UK Research and Innovation http://dx.doi.org/10.13039/100014013 EP/N509796/1 ERA UNSPECIFIED
Related URLs:	Other Related item in WRAP
Contributors:	Contribution Name Contributor ID Depositor Wheeler-Jones, Evé 83241

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