Investigation of nano-sized Cu(II)O as a high capacity conversion material for Li-metal cells and lithium-ion full cells

Qian, Y; Niehoff, P; Zhou, D; Adam, R; Mikhailova, D; Pyschik, M; Börner, M; Klöpsch, R; Rafaja, D; Schumacher, G; Ehrenberg, H; Winter, M; Schappacher, F

Investigation of nano-sized Cu(II)O as a high capacity conversion material for Li-metal cells and lithium-ion full cells

Qian, Y Niehoff, P Zhou, D

Adam, R Mikhailova, D Pyschik, M Börner, M Klöpsch, R Rafaja, D Schumacher, G Ehrenberg, H Winter, M Schappacher, F

Permalink

Publication Type:: Journal Article
Citation:: Journal of Materials Chemistry A, 2017, 5 (14), pp. 6556 - 6568
Issue Date:: 2017-01-01

Closed Access

	Filename	Description	Size
	c6ta10944f.pdf	Published Version	1.87 MB	Adobe PDF	View/Open

Copyright Clearance Process

Recently Added
In Progress
Closed Access

This item is closed access and not available.

Full metadata record

Field	Value	Language
dc.contributor.author	Qian, Y	en_US
dc.contributor.author	Niehoff, P	en_US
dc.contributor.author	Zhou, D https://orcid.org/0000-0002-2578-7124	en_US
dc.contributor.author	Adam, R	en_US
dc.contributor.author	Mikhailova, D	en_US
dc.contributor.author	Pyschik, M	en_US
dc.contributor.author	Börner, M	en_US
dc.contributor.author	Klöpsch, R	en_US
dc.contributor.author	Rafaja, D	en_US
dc.contributor.author	Schumacher, G	en_US
dc.contributor.author	Ehrenberg, H	en_US
dc.contributor.author	Winter, M	en_US
dc.contributor.author	Schappacher, F	en_US
dc.date.issued	2017-01-01	en_US
dc.identifier.citation	Journal of Materials Chemistry A, 2017, 5 (14), pp. 6556 - 6568	en_US
dc.identifier.issn	2050-7488	en_US
dc.identifier.uri	http://hdl.handle.net/10453/125880
dc.description.abstract	© The Royal Society of Chemistry. In this study, self-prepared nanostructured CuO electrodes show no capacity decay for 40 cycles at 0.1C in Li metal cells. The reaction mechanisms of the CuO electrodes are investigated. With the help of in situ EIS, in situ XRD, TEM, XAS, SQUID, IC and GC-MS, it is found that the as-prepared CuO electrode undergoes significant phase and composition changes during the initial lithiation, with the transformation of CuO to nano-crystalline Cu. During the 1st delithiation, Cu is inhomogeneously oxidized, which yields a mixture of Cu2O, Cu2−xO and Cu. The incomplete conversion reaction during the 1st cycle is accompanied by the formation and partial decomposition of the solid electrolyte interphase (SEI) as the side reactions. Nevertheless, from the 1st to the 5th delithiation, the oxidation state of Cu approaches +2. After an additional formation step, the transformation to Cu and back to Cu2−xO remains stable during the subsequent long-term cycling with no electrolyte decomposition products detected. The LiNi1/3Mn1/3Co1/3O2 (NMC-111)/CuO full cells show high capacities (655.8 ± 0.6, 618.6 ± 0.9 and 290 ± 2 mA h g−1 at 0.1, 1 and 10C, respectively), within the voltage range of 0.7-4.0 V at 20 °C and a high capacity retention (85% after 200 cycles at 1C).	en_US
dc.relation.ispartof	Journal of Materials Chemistry A	en_US
dc.relation.isbasedon	10.1039/C6TA10944F	en_US
dc.title	Investigation of nano-sized Cu(II)O as a high capacity conversion material for Li-metal cells and lithium-ion full cells	en_US
dc.type	Journal Article
utslib.citation.volume	14	en_US
utslib.citation.volume	5	en_US
utslib.for	0306 Physical Chemistry (incl. Structural)	en_US
utslib.for	0303 Macromolecular and Materials Chemistry	en_US
utslib.for	0912 Materials Engineering	en_US
utslib.for	0915 Interdisciplinary Engineering	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Mathematical and Physical Sciences
utslib.copyright.status	closed_access
pubs.issue	14	en_US
pubs.publication-status	Published	en_US
pubs.volume	5	en_US

Abstract:

© The Royal Society of Chemistry. In this study, self-prepared nanostructured CuO electrodes show no capacity decay for 40 cycles at 0.1C in Li metal cells. The reaction mechanisms of the CuO electrodes are investigated. With the help of in situ EIS, in situ XRD, TEM, XAS, SQUID, IC and GC-MS, it is found that the as-prepared CuO electrode undergoes significant phase and composition changes during the initial lithiation, with the transformation of CuO to nano-crystalline Cu. During the 1st delithiation, Cu is inhomogeneously oxidized, which yields a mixture of Cu2O, Cu2−xO and Cu. The incomplete conversion reaction during the 1st cycle is accompanied by the formation and partial decomposition of the solid electrolyte interphase (SEI) as the side reactions. Nevertheless, from the 1st to the 5th delithiation, the oxidation state of Cu approaches +2. After an additional formation step, the transformation to Cu and back to Cu2−xO remains stable during the subsequent long-term cycling with no electrolyte decomposition products detected. The LiNi1/3Mn1/3Co1/3O2 (NMC-111)/CuO full cells show high capacities (655.8 ± 0.6, 618.6 ± 0.9 and 290 ± 2 mA h g−1 at 0.1, 1 and 10C, respectively), within the voltage range of 0.7-4.0 V at 20 °C and a high capacity retention (85% after 200 cycles at 1C).

Please use this identifier to cite or link to this item:

http://hdl.handle.net/10453/125880