View in EDS

Rapid preparation and characterization of oxygen-deficient SnO2 nanobelts with enhanced Li diffusion kinetics.

Saved in:
Bibliographic Details
Title: Rapid preparation and characterization of oxygen-deficient SnO2 nanobelts with enhanced Li diffusion kinetics.
Authors: He, Zhen-Kun1 (AUTHOR), Kamali, Ali Reza1,2,3 (AUTHOR) a.r.kamali@cantab.net, Wang, Zeng-Rong1 (AUTHOR), Sun, Qiang1 (AUTHOR), Shi, Zhongning1,2 (AUTHOR), Wang, Dexi2 (AUTHOR)
Source: Journal of Electroanalytical Chemistry. Aug2020, Vol. 871, pN.PAG-N.PAG. 1p.
Subjects: Diffusion kinetics, Nanobelts, High resolution electron microscopy, Surface diffusion, Calcination (Heat treatment), X-ray photoelectron spectroscopy, Diffusion coefficients
Abstract: Li surface diffusion kinetics is an important parameter in determining the electrochemical performance of metal oxide electrodes used in Li ion batteries. Here, we investigate this parameter in SnO 2 nanobelts. A low cost, simple and facile in-situ calcination method is developed to fabricate highly crystalline SnO 2 nanobelts with surface oxygen vacancies using commercially available tin oxide particles as the precursor. The phase composition, morphology and surface characteristics of the SnO 2 nanobelts are investigated by several techniques, including the X-ray diffraction and photoelectron spectroscopy, high resolution electron microscopy and electrochemical evaluations. The Li ion surface diffusion coefficients of nanobelts are investigated by impendence spectroscopy and sweep voltammetry measurements; and found to be 1.07 × 10−11 cm2 s−1. Such enhanced Li surface diffusion kinetics as well as significant contribution from pseudocapacitance result in an excellent Li-ion storage performance of SnO 2 nanobelts, while the free space between the nanobelts provides morphological stability during prolonged battery cycles. • High yield in-situ preparation of SnO 2 nanobelts • Surface oxygen vacancy-derived growth • Enhanced Li surface diffusion kinetics • Lithium-ion storage performance [ABSTRACT FROM AUTHOR]
Copyright of Journal of Electroanalytical Chemistry is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
Description
Abstract:Li surface diffusion kinetics is an important parameter in determining the electrochemical performance of metal oxide electrodes used in Li ion batteries. Here, we investigate this parameter in SnO 2 nanobelts. A low cost, simple and facile in-situ calcination method is developed to fabricate highly crystalline SnO 2 nanobelts with surface oxygen vacancies using commercially available tin oxide particles as the precursor. The phase composition, morphology and surface characteristics of the SnO 2 nanobelts are investigated by several techniques, including the X-ray diffraction and photoelectron spectroscopy, high resolution electron microscopy and electrochemical evaluations. The Li ion surface diffusion coefficients of nanobelts are investigated by impendence spectroscopy and sweep voltammetry measurements; and found to be 1.07 × 10−11 cm2 s−1. Such enhanced Li surface diffusion kinetics as well as significant contribution from pseudocapacitance result in an excellent Li-ion storage performance of SnO 2 nanobelts, while the free space between the nanobelts provides morphological stability during prolonged battery cycles. • High yield in-situ preparation of SnO 2 nanobelts • Surface oxygen vacancy-derived growth • Enhanced Li surface diffusion kinetics • Lithium-ion storage performance [ABSTRACT FROM AUTHOR]
ISSN:15726657
DOI:10.1016/j.jelechem.2020.114276