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Article: The effects of N-methyl-N-butylpyrrolidinium bis(trifluoromethylsulfonyl) imide-based electrolyte on the electrochemical performance of high capacity cathode material Li[Li 0.2Mn 0.54Ni 0.13Co 0.13]O 2

TitleThe effects of N-methyl-N-butylpyrrolidinium bis(trifluoromethylsulfonyl) imide-based electrolyte on the electrochemical performance of high capacity cathode material Li[Li 0.2Mn 0.54Ni 0.13Co 0.13]O 2
Authors
KeywordsElectrolyte
High Capacity
Ionic Liquid
Lithium Ion Battery
Lithium-Rich Material
Issue Date2012
PublisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/electacta
Citation
Electrochimica Acta, 2012, v. 59, p. 14-22 How to Cite?
AbstractThe effects of ionic liquid (IL) N-methyl-N-butylpyrrolidinium bis(trifluoromethylsulfonyl)imide (Py 14TFSI) based electrolyte on the electrochemical performance of cathode material Li[Li 0.2Mn 0.54Ni 0.13Co 0.13]O 2 have been investigated. The results of thermogravimetric analysis (TGA), flammability and differential scanning calorimetry (DSC) tests indicate that Py 14TFSI addition enhances thermal stability of the electrolyte and reduces the safety concern of Li-ion battery. Electrochemical measurements demonstrate that the cathode material shows good electrochemical performance in Py 14TFSI-added electrolyte. The cathode material is able to deliver high initial discharge capacity of 250 mAh g -1 in electrolyte with Py 14TFSI content up to 80% at 0.1 C. In addition, the cathode material delivers less initial irreversible capacity loss and higher initial coulombic efficiency in electrolyte with higher Py 14TFSI content. However, increasing Py 14TFSI content in the electrolyte affects rate capability of the cathode material distinctively. With 60% Py 14TFSI-added electrolyte, Li[Li 0.2Mn 0.54Ni 0.13Co 0.13]O 2 shows better cycling stability with a capacity retention of 84.4% after 150 cycles at 1.0 C than that in IL free electrolyte. The superior cycling performance of the cathode material cycled in Py 14TFSI-added electrolyte is mainly ascribed to the formation of stable electrode/electrolyte interfaces, based on the results of scanning electron microscopy (SEM), X-ray photoelectron spectra (XPS) and electrochemical impedance spectroscopy (EIS) investigations. © 2011 Elsevier Ltd. All Rights Reserved.
Persistent Identifierhttp://hdl.handle.net/10722/168599
ISSN
2015 Impact Factor: 4.803
2015 SCImago Journal Rankings: 1.391
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorZheng, Jen_US
dc.contributor.authorZhu, Den_US
dc.contributor.authorYang, Yen_US
dc.contributor.authorFung, Yen_US
dc.date.accessioned2012-10-08T03:21:22Z-
dc.date.available2012-10-08T03:21:22Z-
dc.date.issued2012en_US
dc.identifier.citationElectrochimica Acta, 2012, v. 59, p. 14-22en_US
dc.identifier.issn0013-4686en_US
dc.identifier.urihttp://hdl.handle.net/10722/168599-
dc.description.abstractThe effects of ionic liquid (IL) N-methyl-N-butylpyrrolidinium bis(trifluoromethylsulfonyl)imide (Py 14TFSI) based electrolyte on the electrochemical performance of cathode material Li[Li 0.2Mn 0.54Ni 0.13Co 0.13]O 2 have been investigated. The results of thermogravimetric analysis (TGA), flammability and differential scanning calorimetry (DSC) tests indicate that Py 14TFSI addition enhances thermal stability of the electrolyte and reduces the safety concern of Li-ion battery. Electrochemical measurements demonstrate that the cathode material shows good electrochemical performance in Py 14TFSI-added electrolyte. The cathode material is able to deliver high initial discharge capacity of 250 mAh g -1 in electrolyte with Py 14TFSI content up to 80% at 0.1 C. In addition, the cathode material delivers less initial irreversible capacity loss and higher initial coulombic efficiency in electrolyte with higher Py 14TFSI content. However, increasing Py 14TFSI content in the electrolyte affects rate capability of the cathode material distinctively. With 60% Py 14TFSI-added electrolyte, Li[Li 0.2Mn 0.54Ni 0.13Co 0.13]O 2 shows better cycling stability with a capacity retention of 84.4% after 150 cycles at 1.0 C than that in IL free electrolyte. The superior cycling performance of the cathode material cycled in Py 14TFSI-added electrolyte is mainly ascribed to the formation of stable electrode/electrolyte interfaces, based on the results of scanning electron microscopy (SEM), X-ray photoelectron spectra (XPS) and electrochemical impedance spectroscopy (EIS) investigations. © 2011 Elsevier Ltd. All Rights Reserved.en_US
dc.languageengen_US
dc.publisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/electactaen_US
dc.relation.ispartofElectrochimica Actaen_US
dc.subjectElectrolyteen_US
dc.subjectHigh Capacityen_US
dc.subjectIonic Liquiden_US
dc.subjectLithium Ion Batteryen_US
dc.subjectLithium-Rich Materialen_US
dc.titleThe effects of N-methyl-N-butylpyrrolidinium bis(trifluoromethylsulfonyl) imide-based electrolyte on the electrochemical performance of high capacity cathode material Li[Li 0.2Mn 0.54Ni 0.13Co 0.13]O 2en_US
dc.typeArticleen_US
dc.identifier.emailFung, Y:ysfung@hku.hken_US
dc.identifier.authorityFung, Y=rp00697en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1016/j.electacta.2011.09.069en_US
dc.identifier.scopuseid_2-s2.0-84655162287en_US
dc.identifier.hkuros203510-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-84655162287&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume59en_US
dc.identifier.spage14en_US
dc.identifier.epage22en_US
dc.identifier.isiWOS:000299911500003-
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridZheng, J=24825842400en_US
dc.identifier.scopusauthoridZhu, D=7403599128en_US
dc.identifier.scopusauthoridYang, Y=11640445100en_US
dc.identifier.scopusauthoridFung, Y=13309754700en_US
dc.identifier.citeulike9946926-

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