Please use this identifier to cite or link to this item: https://doi.org/10.1021/am4047552
Title: Li storage and impedance spectroscopy studies on Co3O 4, CoO, and CoN for Li-ion batteries
Authors: Reddy, M.V. 
Prithvi, G.
Loh, K.P.
Chowdari, B.V.R.
Keywords: anode materials
bulk preparation methods
Co3O4
CoN
CoO
electrochemical characteristics
lithium-ion batteries
Issue Date: 8-Jan-2014
Citation: Reddy, M.V., Prithvi, G., Loh, K.P., Chowdari, B.V.R. (2014-01-08). Li storage and impedance spectroscopy studies on Co3O 4, CoO, and CoN for Li-ion batteries. ACS Applied Materials and Interfaces 6 (1) : 680-690. ScholarBank@NUS Repository. https://doi.org/10.1021/am4047552
Abstract: The compounds, CoN, CoO, and Co3O4 were prepared in the form of nano-rod/particles and we investigated the Li-cycling properties, and their use as an anode material. The urea combustion method, nitridation, and carbothermal reduction methods were adopted to prepare Co3O 4, CoN, and CoO, respectively. X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), and the Brunauer-Emmett-Teller (BET) surface and density methods were used to characterise the materials. Cyclic voltammetry (CV) was performed and galvanostatic cycling tests were also conducted up to 60-70 cycles. The observed reversible capacity of all compounds is of the increasing order CoO, Co 3O4, CoN and all compounds showed negligible capacity fading. CoO allows for Li2O and Co metal to form during the discharge cycle, allowing for a high theoretical capacity of 715 mA h g-1. Co3O4 allows for 4 Li2O and 3Co to form, and has a theoretical capacity of 890 mAhg-1. CoN is the best anode material of the three because the nitrogen allows for Li3N and Co to form, resulting in an even higher theoretical capacity of 1100 mAhg-1 due to the Li3N and Co metal formation. Irrespective of morphology the charge profiles of all three compounds showed a major plateaux ∼2.0 V vs. Li and potential values are almost unchanged irrespective of crystal structure. Electrochemical impedance spectroscopy (EIS) was performed to understand variation resistance and capacitance values. © 2013 American Chemical Society.
Source Title: ACS Applied Materials and Interfaces
URI: http://scholarbank.nus.edu.sg/handle/10635/97061
ISSN: 19448244
DOI: 10.1021/am4047552
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

SCOPUSTM   
Citations

113
checked on Jul 13, 2018

WEB OF SCIENCETM
Citations

103
checked on Jun 11, 2018

Page view(s)

40
checked on Jun 22, 2018

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.