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Article: Building better lithium-sulfur batteries: from LiNO3 to solid oxide catalyst

TitleBuilding better lithium-sulfur batteries: from LiNO3 to solid oxide catalyst
Authors
Issue Date2016
PublisherNature Publishing Group: Open Access Journals - Option C. The Journal's web site is located at http://www.nature.com/srep/index.html
Citation
Scientific Reports, 2016, v. 6, p. 33154 How to Cite?
Abstract© The Author(s) 2016.Lithium nitrate (LiNO2) is known as an important electrolyte additive in lithium-sulfur (Li-S) batteries. The prevailing understanding is that LiNO2 reacts with metallic lithium anode to form a passivation layer which suppresses redox shuttles of lithium polysulfides, enabling good rechargeability of Li-S batteries. However, this view is seeing more challenges in the recent studies, and above all, the inability of inhibiting polysulfide reduction on Li anode. A closely related issue is the progressive reduction of LiNO2 on Li anode which elevates internal resistance of the cell and compromises its cycling stability. Herein, we systematically investigated the function of LiNO2 in redox-shuttle suppression, and propose the suppression as a result of catalyzed oxidation of polysulfides to sulfur by nitrate anions on or in the proximity of the electrode surface upon cell charging. This hypothesis is supported by both density functional theory calculations and the nitrate anions-suppressed self-discharge rate in Li-S cells. The catalytic mechanism is further validated by the use of ruthenium oxide (RuO2, a good oxygen evolution catalyst) on cathode, which equips the LiNO2 -free cell with higher capacity and improved capacity retention over 400 cycles.
Persistent Identifierhttp://hdl.handle.net/10722/237534
ISSN
2017 Impact Factor: 4.122
2015 SCImago Journal Rankings: 2.073
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorDing, N-
dc.contributor.authorZhou, L-
dc.contributor.authorZhou, CW-
dc.contributor.authorGeng, DS-
dc.contributor.authorYang, J-
dc.contributor.authorChien, SW-
dc.contributor.authorLiu, ZL-
dc.contributor.authorNg, MF-
dc.contributor.authorYu, AS-
dc.contributor.authorHor, TSA-
dc.contributor.authorSullivan, MB-
dc.contributor.authorZong, Y-
dc.date.accessioned2017-01-16T06:09:32Z-
dc.date.available2017-01-16T06:09:32Z-
dc.date.issued2016-
dc.identifier.citationScientific Reports, 2016, v. 6, p. 33154-
dc.identifier.issn2045-2322-
dc.identifier.urihttp://hdl.handle.net/10722/237534-
dc.description.abstract© The Author(s) 2016.Lithium nitrate (LiNO2) is known as an important electrolyte additive in lithium-sulfur (Li-S) batteries. The prevailing understanding is that LiNO2 reacts with metallic lithium anode to form a passivation layer which suppresses redox shuttles of lithium polysulfides, enabling good rechargeability of Li-S batteries. However, this view is seeing more challenges in the recent studies, and above all, the inability of inhibiting polysulfide reduction on Li anode. A closely related issue is the progressive reduction of LiNO2 on Li anode which elevates internal resistance of the cell and compromises its cycling stability. Herein, we systematically investigated the function of LiNO2 in redox-shuttle suppression, and propose the suppression as a result of catalyzed oxidation of polysulfides to sulfur by nitrate anions on or in the proximity of the electrode surface upon cell charging. This hypothesis is supported by both density functional theory calculations and the nitrate anions-suppressed self-discharge rate in Li-S cells. The catalytic mechanism is further validated by the use of ruthenium oxide (RuO2, a good oxygen evolution catalyst) on cathode, which equips the LiNO2 -free cell with higher capacity and improved capacity retention over 400 cycles.-
dc.languageeng-
dc.publisherNature Publishing Group: Open Access Journals - Option C. The Journal's web site is located at http://www.nature.com/srep/index.html-
dc.relation.ispartofScientific Reports-
dc.rightsThis work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.-
dc.titleBuilding better lithium-sulfur batteries: from LiNO3 to solid oxide catalyst-
dc.typeArticle-
dc.identifier.emailHor, TSA: andyhor@hku.hk-
dc.identifier.authorityHor, TSA=rp02077-
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1038/srep33154-
dc.identifier.scopuseid_2-s2.0-84987850229-
dc.identifier.hkuros285669-
dc.identifier.volume6-
dc.identifier.spage33154-
dc.identifier.epage33154-
dc.identifier.eissn2045-2322-
dc.identifier.isiWOS:000383192300001-
dc.publisher.placeUnited Kingdom-

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