Evaluation of Cu3N and CuO as negative electrode materials for sodium batteries
Evaluation of Cu3N and CuO as negative electrode materials for sodium batteries
Copper(I) nitride, produced by the ammonolysis of copper(II) pivalate at 250 °C, shows a competitive capacity and stable cycling behavior in sodium cells with a NaPF6/ethyl carbonate/diethyl carbonate electrolyte. Ex situ X-ray diffraction studies suggest that this material acts as a conversion electrode, with Cu3N reduced to copper metal, but that these reactions occur only at the surfaces of the particles. A higher capacity is observed in lithium cells, again with stable cycling behavior. Hydrolysis results in nanocrystalline CuO, which has a higher sodium cell capacity. However, this capacity gradually decays on cycling and, after 30 cycles, is similar to that observed with Cu3N.
29568-29573
Li, Xianji
af8b4164-d034-4ea3-8317-fa5dd676c1e2
Hector, Andrew Lee
f19a8f31-b37f-4474-b32a-b7cf05b9f0e5
Owen, John R.
067986ea-f3f3-4a83-bc87-7387cc5ac85d
26 December 2014
Li, Xianji
af8b4164-d034-4ea3-8317-fa5dd676c1e2
Hector, Andrew Lee
f19a8f31-b37f-4474-b32a-b7cf05b9f0e5
Owen, John R.
067986ea-f3f3-4a83-bc87-7387cc5ac85d
Li, Xianji, Hector, Andrew Lee and Owen, John R.
(2014)
Evaluation of Cu3N and CuO as negative electrode materials for sodium batteries.
The Journal of Physical Chemistry C, 118 (51), .
(doi:10.1021/jp509385w).
Abstract
Copper(I) nitride, produced by the ammonolysis of copper(II) pivalate at 250 °C, shows a competitive capacity and stable cycling behavior in sodium cells with a NaPF6/ethyl carbonate/diethyl carbonate electrolyte. Ex situ X-ray diffraction studies suggest that this material acts as a conversion electrode, with Cu3N reduced to copper metal, but that these reactions occur only at the surfaces of the particles. A higher capacity is observed in lithium cells, again with stable cycling behavior. Hydrolysis results in nanocrystalline CuO, which has a higher sodium cell capacity. However, this capacity gradually decays on cycling and, after 30 cycles, is similar to that observed with Cu3N.
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e-pub ahead of print date: 25 November 2014
Published date: 26 December 2014
Organisations:
Electrochemistry
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Local EPrints ID: 373035
URI: http://eprints.soton.ac.uk/id/eprint/373035
ISSN: 1932-7447
PURE UUID: c54188ca-f921-41fa-957e-f71d47c00628
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Date deposited: 06 Jan 2015 12:00
Last modified: 15 Mar 2024 02:52
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Xianji Li
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