Syntheses, structures, and preliminary electrochemistry of the layered lithium and sodium manganese(IV) oxides, A2Mn3O7
Syntheses, structures, and preliminary electrochemistry of the layered lithium and sodium manganese(IV) oxides, A2Mn3O7
Li2Mn3O7 (Mn(IV)) has been obtained, by ion exchange in nonaqueous media, from Na-2-Mn3O7 prepared at high pressure. The structures of both materials have been investigated by powder neutron diffraction. Na2Mn3O7 has been found to adopt the structure previously described in the literature, but evidence of stacking disorder of the Mn3O72- layers is observed. The structure of Li2Mn3O7 is based on the same manganese deficient MnO2 layers of stoichiometry Mn3O72- but with an arrangement similar to that found in alpha -NaFeO2 with lithium disordered over partially occupied octahedral sites between the layers. Preliminary investigations of the electrochemical properties of Li2Mn3O7 reveal a good capacity of 160 mAh g(-1) and retention of the capacity over at least 30 cycles.
limno2, batteries, electrode, cell
4618-4623
Raekelboom, E. A.
ffeaded6-dab3-44c4-b4b3-a3a461e15618
Hector, A. L.
f19a8f31-b37f-4474-b32a-b7cf05b9f0e5
Owen, J.
067986ea-f3f3-4a83-bc87-7387cc5ac85d
Vitins, G.
f9adaad3-486e-4ca8-be54-9de20bb77609
Weller, M. T.
36a60b56-049f-466c-a1d7-39d6b0d85ff4
1 December 2001
Raekelboom, E. A.
ffeaded6-dab3-44c4-b4b3-a3a461e15618
Hector, A. L.
f19a8f31-b37f-4474-b32a-b7cf05b9f0e5
Owen, J.
067986ea-f3f3-4a83-bc87-7387cc5ac85d
Vitins, G.
f9adaad3-486e-4ca8-be54-9de20bb77609
Weller, M. T.
36a60b56-049f-466c-a1d7-39d6b0d85ff4
Raekelboom, E. A., Hector, A. L., Owen, J., Vitins, G. and Weller, M. T.
(2001)
Syntheses, structures, and preliminary electrochemistry of the layered lithium and sodium manganese(IV) oxides, A2Mn3O7.
Chemistry of Materials, 13 (12), .
(doi:10.1021/cm011105j).
Abstract
Li2Mn3O7 (Mn(IV)) has been obtained, by ion exchange in nonaqueous media, from Na-2-Mn3O7 prepared at high pressure. The structures of both materials have been investigated by powder neutron diffraction. Na2Mn3O7 has been found to adopt the structure previously described in the literature, but evidence of stacking disorder of the Mn3O72- layers is observed. The structure of Li2Mn3O7 is based on the same manganese deficient MnO2 layers of stoichiometry Mn3O72- but with an arrangement similar to that found in alpha -NaFeO2 with lithium disordered over partially occupied octahedral sites between the layers. Preliminary investigations of the electrochemical properties of Li2Mn3O7 reveal a good capacity of 160 mAh g(-1) and retention of the capacity over at least 30 cycles.
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Published date: 1 December 2001
Keywords:
limno2, batteries, electrode, cell
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Local EPrints ID: 19602
URI: http://eprints.soton.ac.uk/id/eprint/19602
ISSN: 0897-4756
PURE UUID: b9ab4869-2bdd-4f50-be3f-d6a546bbb0fd
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Date deposited: 14 Feb 2006
Last modified: 16 Mar 2024 02:53
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Author:
E. A. Raekelboom
Author:
G. Vitins
Author:
M. T. Weller
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