A dual-functional gel-polymer electrolyte for lithium ion batteries with superior rate and safety performances

Li, X; Qian, K; He, YB; Liu, C; An, D; Li, Y; Zhou, D; Lin, Z; Li, B; Yang, QH; Kang, F

A dual-functional gel-polymer electrolyte for lithium ion batteries with superior rate and safety performances

Li, X Qian, K He, YB Liu, C An, D Li, Y Zhou, D

Lin, Z Li, B Yang, QH Kang, F

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Publication Type:: Journal Article
Citation:: Journal of Materials Chemistry A, 2017, 5 (35), pp. 18888 - 18895
Issue Date:: 2017-01-01

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Field	Value	Language
dc.contributor.author	Li, X	en_US
dc.contributor.author	Qian, K	en_US
dc.contributor.author	He, YB	en_US
dc.contributor.author	Liu, C	en_US
dc.contributor.author	An, D	en_US
dc.contributor.author	Li, Y	en_US
dc.contributor.author	Zhou, D https://orcid.org/0000-0002-2578-7124	en_US
dc.contributor.author	Lin, Z	en_US
dc.contributor.author	Li, B	en_US
dc.contributor.author	Yang, QH	en_US
dc.contributor.author	Kang, F	en_US
dc.date.issued	2017-01-01	en_US
dc.identifier.citation	Journal of Materials Chemistry A, 2017, 5 (35), pp. 18888 - 18895	en_US
dc.identifier.issn	2050-7488	en_US
dc.identifier.uri	http://hdl.handle.net/10453/121850
dc.description.abstract	© 2017 The Royal Society of Chemistry. The ability to judiciously utilize gel-polymer electrolytes (GPEs) that replace liquid electrolytes is widely recognized as an attractive route to solving the safety concerns of Li-ion batteries (LIBs). In this context, novel LiNi0.8Co0.15Al0.05O2 (NCA)/graphite GPE and NCA/graphite-Si/C GPE batteries with high energy density and excellent electrochemical and safety performances are developed via in situ polymerization of pentaerythritol tetraacrylate (PETEA) in a liquid electrolyte. Notably, the capacity retention of NCA/graphite and NCA/graphite-Si/C GPE batteries after 200 cycles at the discharge rate of 5C is 92.5% and 81.2%, respectively, which are much larger than those implementing liquid electrolytes (i.e., only 55.9% and 51.4%, respectively). Interestingly, the GPE batteries also displayed considerably lower gas production, especially the graphite-Si/C anode battery, and did not undergo a violent combustion during the nail penetration test compared to the liquid electrolyte batteries. The markedly enhanced performances noted above can be attributed to the three-dimensional framework of the GPE which promoted the formation of a very tight protective film on the surface of the electrodes during cycling, thereby inhibiting the cyclable Li consumption and side reactions with the electrolyte. Furthermore, such a protective film effectively retained the structural integrity of the electrodes during the cycling process and reduced the heat reactions between the electrodes and electrolyte.	en_US
dc.relation.ispartof	Journal of Materials Chemistry A	en_US
dc.relation.isbasedon	10.1039/c7ta04415a	en_US
dc.title	A dual-functional gel-polymer electrolyte for lithium ion batteries with superior rate and safety performances	en_US
dc.type	Journal Article
utslib.citation.volume	35	en_US
utslib.citation.volume	5	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	35	en_US
pubs.publication-status	Published	en_US
pubs.volume	5	en_US

Abstract:

© 2017 The Royal Society of Chemistry. The ability to judiciously utilize gel-polymer electrolytes (GPEs) that replace liquid electrolytes is widely recognized as an attractive route to solving the safety concerns of Li-ion batteries (LIBs). In this context, novel LiNi0.8Co0.15Al0.05O2 (NCA)/graphite GPE and NCA/graphite-Si/C GPE batteries with high energy density and excellent electrochemical and safety performances are developed via in situ polymerization of pentaerythritol tetraacrylate (PETEA) in a liquid electrolyte. Notably, the capacity retention of NCA/graphite and NCA/graphite-Si/C GPE batteries after 200 cycles at the discharge rate of 5C is 92.5% and 81.2%, respectively, which are much larger than those implementing liquid electrolytes (i.e., only 55.9% and 51.4%, respectively). Interestingly, the GPE batteries also displayed considerably lower gas production, especially the graphite-Si/C anode battery, and did not undergo a violent combustion during the nail penetration test compared to the liquid electrolyte batteries. The markedly enhanced performances noted above can be attributed to the three-dimensional framework of the GPE which promoted the formation of a very tight protective film on the surface of the electrodes during cycling, thereby inhibiting the cyclable Li consumption and side reactions with the electrolyte. Furthermore, such a protective film effectively retained the structural integrity of the electrodes during the cycling process and reduced the heat reactions between the electrodes and electrolyte.

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http://hdl.handle.net/10453/121850