Li2CuO2 as an additive for capacity enhancement of lithium ion cells
Li2CuO2 as an additive for capacity enhancement of lithium ion cells
The lithium-rich cuprate Li2CuO2 shows a high specific charge capacity of 320-340 mAh g(-1) due to lithium extraction on oxidation up to 4.5 V versus Li. However, poor reversibility of this reaction limits the application of this material in lithium ion cells as the active material in the positive electrode. Nevertheless, this inexpensive, easily synthesised, air stable material may be useful as an additive to the positive electrode for reduction of capacity loss caused by poor reversibility of the negative electrode. Electrochemical testing of a composite Li2CuO2/LiMn2O4 electrode versus Li shows that no interference occurs between these two materials and that LiMn2O4 maintains its long cycle life in the voltage range 3.0-4.5 V versus Li. The calculated enhancement of effective specific capacity due to the additive increases with the fraction of charge lost at the negative, reaching 10% enhancement at 20% capacity loss.
lithium cuprate (li2cuo2), lithium manganese oxide (limn2o4), composite electrodes, lithium cells, lithium ion cellsneutron-diffraction, crystal-structure, cuprate li3cu2o4, licuo2
938-942
Vitins, G.
f9adaad3-486e-4ca8-be54-9de20bb77609
Raekelboom, E.A.
1a192db3-4ba9-4642-9e36-90ddffc47487
Weller, M.T.
36a60b56-049f-466c-a1d7-39d6b0d85ff4
Owen, J.R.
067986ea-f3f3-4a83-bc87-7387cc5ac85d
1 June 2003
Vitins, G.
f9adaad3-486e-4ca8-be54-9de20bb77609
Raekelboom, E.A.
1a192db3-4ba9-4642-9e36-90ddffc47487
Weller, M.T.
36a60b56-049f-466c-a1d7-39d6b0d85ff4
Owen, J.R.
067986ea-f3f3-4a83-bc87-7387cc5ac85d
Vitins, G., Raekelboom, E.A., Weller, M.T. and Owen, J.R.
(2003)
Li2CuO2 as an additive for capacity enhancement of lithium ion cells.
Journal of Power Sources, 119, .
(doi:10.1016/S0378-7753(03)00236-2).
Abstract
The lithium-rich cuprate Li2CuO2 shows a high specific charge capacity of 320-340 mAh g(-1) due to lithium extraction on oxidation up to 4.5 V versus Li. However, poor reversibility of this reaction limits the application of this material in lithium ion cells as the active material in the positive electrode. Nevertheless, this inexpensive, easily synthesised, air stable material may be useful as an additive to the positive electrode for reduction of capacity loss caused by poor reversibility of the negative electrode. Electrochemical testing of a composite Li2CuO2/LiMn2O4 electrode versus Li shows that no interference occurs between these two materials and that LiMn2O4 maintains its long cycle life in the voltage range 3.0-4.5 V versus Li. The calculated enhancement of effective specific capacity due to the additive increases with the fraction of charge lost at the negative, reaching 10% enhancement at 20% capacity loss.
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Published date: 1 June 2003
Keywords:
lithium cuprate (li2cuo2), lithium manganese oxide (limn2o4), composite electrodes, lithium cells, lithium ion cellsneutron-diffraction, crystal-structure, cuprate li3cu2o4, licuo2
Identifiers
Local EPrints ID: 20099
URI: http://eprints.soton.ac.uk/id/eprint/20099
ISSN: 0378-7753
PURE UUID: dbb93289-f011-46cd-bf04-7a7ccdfe99a8
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Date deposited: 23 Feb 2006
Last modified: 16 Mar 2024 02:43
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Contributors
Author:
G. Vitins
Author:
E.A. Raekelboom
Author:
M.T. Weller
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