Studies on spinel cobaltites, MCo2O4 (M = Mn, Zn, Fe, Ni and Co) and their functional properties

Optimization of electrodes for charge storage with appropriate processing conditions places significant challenges in the developments for high performance charge storage devices. In this article, metal cobaltite spinels of formula MCo2O4 (where M = Mn, Zn, Fe, Ni and Co) are synthesized by oxalate...

Full description

Bibliographic Details
Main Authors:	Darbar, Devendrasinh, Anilkumar, M. R., Rajagopalan, Vijayaraghavan, Bhattacharya, Indranil, Elim, Hendry Izaac, Ramakrishnappa, T., Ezema, F. I., Rajan, Jose, Reddy, M. V.
Format:	Article
Language:	English
Published:	Elsevier Ltd. 2018
Subjects:	Q Science (General)
Online Access:	http://umpir.ump.edu.my/id/eprint/23284/ http://umpir.ump.edu.my/id/eprint/23284/ http://umpir.ump.edu.my/id/eprint/23284/ http://umpir.ump.edu.my/id/eprint/23284/1/Studies%20on%20spinel%20cobaltites.pdf

id	ump-23284
recordtype	eprints
spelling	ump-232842019-01-11T01:07:43Z http://umpir.ump.edu.my/id/eprint/23284/ Studies on spinel cobaltites, MCo2O4 (M = Mn, Zn, Fe, Ni and Co) and their functional properties Darbar, Devendrasinh Anilkumar, M. R. Rajagopalan, Vijayaraghavan Bhattacharya, Indranil Elim, Hendry Izaac Ramakrishnappa, T. Ezema, F. I. Rajan, Jose Reddy, M. V. Q Science (General) Optimization of electrodes for charge storage with appropriate processing conditions places significant challenges in the developments for high performance charge storage devices. In this article, metal cobaltite spinels of formula MCo2O4 (where M = Mn, Zn, Fe, Ni and Co) are synthesized by oxalate decomposition method followed by calcination at three typical temperatures, viz. 350, 550, and 750 °C and examined their performance variation when used as anodes in lithium ion batteries. Phase and structure of the materials are studied by powder x-ray diffraction (XRD) technique. Single phase MnCo2O4,ZnCo2O4 and Co3O4 are obtained for all different temperatures 350 °C, 550 °C and 750 °C; whereas FeCo2O4 and NiCo2O4 contained their constituent binary phases even after repeated calcination. Morphologies of the materials are studied via scanning electron microscopy (SEM): needle-shaped particles of MnCo2O4 and ZnCo2O4, submicron sized particles of FeCo2O4 and agglomerated submicron particle of NiCo2O4 are observed. Galvanostatic cycling has been conducted in the voltage range 0.005–3.0 V vs. Li at a current density of 60 mA g−1 up to 50 cycles to study their Li storage capabilities. Highest observed charge capacities are: MnCo2O4 – 365 mA h g−1 (750 °C); ZnCo2O4 – 516 mA h g−1 (550 °C); FeCo2O4 – 480 mA h g−1 (550 °C); NiCo2O4 – 384 mA h g−1 (750 °C); and Co3O4 – 675 mA h g−1(350 °C). The Co3O4 showed the highest reversible capacity of 675 mA h g−1; the NiO present in NiCo2O4 acts as a buffer layer that results in improved cycling stability; the ZnCo2O4 with long needle-like shows good cycling stability. Elsevier Ltd. 2018 Article PeerReviewed pdf en http://umpir.ump.edu.my/id/eprint/23284/1/Studies%20on%20spinel%20cobaltites.pdf Darbar, Devendrasinh and Anilkumar, M. R. and Rajagopalan, Vijayaraghavan and Bhattacharya, Indranil and Elim, Hendry Izaac and Ramakrishnappa, T. and Ezema, F. I. and Rajan, Jose and Reddy, M. V. (2018) Studies on spinel cobaltites, MCo2O4 (M = Mn, Zn, Fe, Ni and Co) and their functional properties. Ceramics International, 44 (5). pp. 4630-4639. ISSN 0272-8842 https://doi.org/10.1016/j.ceramint.2017.12.010 https://doi.org/10.1016/j.ceramint.2017.12.010
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Malaysia Pahang
building	UMP Institutional Repository
collection	Online Access
language	English
topic	Q Science (General)
spellingShingle	Q Science (General) Darbar, Devendrasinh Anilkumar, M. R. Rajagopalan, Vijayaraghavan Bhattacharya, Indranil Elim, Hendry Izaac Ramakrishnappa, T. Ezema, F. I. Rajan, Jose Reddy, M. V. Studies on spinel cobaltites, MCo2O4 (M = Mn, Zn, Fe, Ni and Co) and their functional properties
description	Optimization of electrodes for charge storage with appropriate processing conditions places significant challenges in the developments for high performance charge storage devices. In this article, metal cobaltite spinels of formula MCo2O4 (where M = Mn, Zn, Fe, Ni and Co) are synthesized by oxalate decomposition method followed by calcination at three typical temperatures, viz. 350, 550, and 750 °C and examined their performance variation when used as anodes in lithium ion batteries. Phase and structure of the materials are studied by powder x-ray diffraction (XRD) technique. Single phase MnCo2O4,ZnCo2O4 and Co3O4 are obtained for all different temperatures 350 °C, 550 °C and 750 °C; whereas FeCo2O4 and NiCo2O4 contained their constituent binary phases even after repeated calcination. Morphologies of the materials are studied via scanning electron microscopy (SEM): needle-shaped particles of MnCo2O4 and ZnCo2O4, submicron sized particles of FeCo2O4 and agglomerated submicron particle of NiCo2O4 are observed. Galvanostatic cycling has been conducted in the voltage range 0.005–3.0 V vs. Li at a current density of 60 mA g−1 up to 50 cycles to study their Li storage capabilities. Highest observed charge capacities are: MnCo2O4 – 365 mA h g−1 (750 °C); ZnCo2O4 – 516 mA h g−1 (550 °C); FeCo2O4 – 480 mA h g−1 (550 °C); NiCo2O4 – 384 mA h g−1 (750 °C); and Co3O4 – 675 mA h g−1(350 °C). The Co3O4 showed the highest reversible capacity of 675 mA h g−1; the NiO present in NiCo2O4 acts as a buffer layer that results in improved cycling stability; the ZnCo2O4 with long needle-like shows good cycling stability.
format	Article
author	Darbar, Devendrasinh Anilkumar, M. R. Rajagopalan, Vijayaraghavan Bhattacharya, Indranil Elim, Hendry Izaac Ramakrishnappa, T. Ezema, F. I. Rajan, Jose Reddy, M. V.
author_facet	Darbar, Devendrasinh Anilkumar, M. R. Rajagopalan, Vijayaraghavan Bhattacharya, Indranil Elim, Hendry Izaac Ramakrishnappa, T. Ezema, F. I. Rajan, Jose Reddy, M. V.
author_sort	Darbar, Devendrasinh
title	Studies on spinel cobaltites, MCo2O4 (M = Mn, Zn, Fe, Ni and Co) and their functional properties
title_short	Studies on spinel cobaltites, MCo2O4 (M = Mn, Zn, Fe, Ni and Co) and their functional properties
title_full	Studies on spinel cobaltites, MCo2O4 (M = Mn, Zn, Fe, Ni and Co) and their functional properties
title_fullStr	Studies on spinel cobaltites, MCo2O4 (M = Mn, Zn, Fe, Ni and Co) and their functional properties
title_full_unstemmed	Studies on spinel cobaltites, MCo2O4 (M = Mn, Zn, Fe, Ni and Co) and their functional properties
title_sort	studies on spinel cobaltites, mco2o4 (m = mn, zn, fe, ni and co) and their functional properties
publisher	Elsevier Ltd.
publishDate	2018
url	http://umpir.ump.edu.my/id/eprint/23284/ http://umpir.ump.edu.my/id/eprint/23284/ http://umpir.ump.edu.my/id/eprint/23284/ http://umpir.ump.edu.my/id/eprint/23284/1/Studies%20on%20spinel%20cobaltites.pdf
first_indexed	2023-09-18T22:34:48Z
last_indexed	2023-09-18T22:34:48Z
_version_	1777416523702337536

Studies on spinel cobaltites, MCo2O4 (M = Mn, Zn, Fe, Ni and Co) and their functional properties

Similar Items