Browse

Anomalous Manganese Activation of a Pyrophosphate Cathode in Sodium Ion Batteries: A Combined Experimental and Theoretical Study

DC Field Value Language
dc.contributor.authorPark, Chan Sun-
dc.contributor.authorKim, Heejin-
dc.contributor.authorShakoor, Rana A.-
dc.contributor.authorYang, Eunjeong-
dc.contributor.authorLim, Soo Yeon-
dc.contributor.authorKahraman, Ramazan-
dc.contributor.authorJung, Yousung-
dc.contributor.authorChoi, Jang Wook-
dc.date.accessioned2020-03-16T11:05:16Z-
dc.date.available2020-03-16T11:05:16Z-
dc.date.issued2013-02-
dc.identifier.citationJournal of the American Chemical Society, Vol.135 No.7, pp.2787-2792-
dc.identifier.issn0002-7863-
dc.identifier.other38524-
dc.identifier.urihttps://hdl.handle.net/10371/164583-
dc.description.abstractSodium ion batteries (SIBs) have many advantages such as the low price and abundance of sodium raw materials that are suitable for large-scale energy storage applications. Herein, we report an Mn-based pyrophosphate, Na2MnP2O7, as a new SIB cathode material. Unlike most Mn-based cathode materials, which suffer severely from sluggish kinetics, Na2MnP2O7 exhibits good electrochemical activity at similar to 3.8 V vs Na/Na+ with a reversible capacity of 90 mAh g(-1) at room temperature. It also shows an excellent cycling and rate performance: 96% capacity retention after 30 cycles and 70% capacity retention at a c-rate increase from 0.05C to 1C. These electrochemical activities of the Mn-containing cathode material even at room temperature with relatively large particle sizes are remarkable considering an almost complete inactivity of the Li counterpart, Li2MnP2O7. Using first-principles calculations, we find that the significantly enhanced kinetics of Na2MnP2O7 is mainly due to the locally flexible accommodation of Jahn-Teller distortions aided by the corner-sharing crystal structure in triclinic Na2MnP2O7. By contrast, in monoclinic Li2MnP2O7, the edge-sharing geometry causes multiple bonds to be broken and formed during charging reaction with a large degree of atomic rearrangements. We expect that the similar computational strategy to analyze the atomic rearrangements can be used to predict the kinetics behavior when exploring new cathode candidates.-
dc.titleAnomalous Manganese Activation of a Pyrophosphate Cathode in Sodium Ion Batteries: A Combined Experimental and Theoretical Study-
dc.typeArticle-
dc.contributor.AlternativeAuthor최장욱-
dc.identifier.doi10.1021/ja312044k-
dc.citation.journaltitleJournal of the American Chemical Society-
dc.identifier.scopusid2-s2.0-84874044687-
dc.citation.endpage2792-
dc.citation.number7-
dc.citation.startpage2787-
dc.citation.volume135-
dc.identifier.urlhttps://pubs.acs.org/doi/10.1021/ja312044k-
dc.identifier.rimsid38524-
dc.identifier.sci000315373000058-
dc.description.isOpenAccessN-
dc.contributor.affiliatedAuthorChoi, Jang Wook-
Appears in Collections:
College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Chemical and Biological Engineering (화학생물공학부)Journal Papers (저널논문_화학생물공학부)
Files in This Item:
There are no files associated with this item.
  • mendeley

Items in S-Space are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse