Please use this identifier to cite or link to this item:
Full metadata record
DC FieldValueLanguage
dc.contributor.authorLiu, Jileien_US
dc.contributor.authorYin, Tingtingen_US
dc.contributor.authorTian, Bingbingen_US
dc.contributor.authorZhang, Boweien_US
dc.contributor.authorQian, Chengen_US
dc.contributor.authorWang, Zhiqiangen_US
dc.contributor.authorZhang, Lilien_US
dc.contributor.authorLiang, Peien_US
dc.contributor.authorChen, Zhenen_US
dc.contributor.authorYan, Jiaxuen_US
dc.contributor.authorFan, Xiaofengen_US
dc.contributor.authorLin, Jianyien_US
dc.contributor.authorChen, Xiaohuaen_US
dc.contributor.authorHuang, Yizhongen_US
dc.contributor.authorLoh, Kian Pingen_US
dc.contributor.authorShen, Zexiangen_US
dc.identifier.citationLiu, J., Yin, T., Tian, B., Zhang, B., Qian, C., Wang, Z., Zhang, L., Liang, P., Chen, Z., Yan, J., Fan, X., Lin, J., Chen, X., Huang, Y., Loh, K. P. & Shen, Z. (2019). Unraveling the potassium storage mechanism in graphite foam. Advanced Energy Materials, 9(22), 1900579--.
dc.description.abstractPotassium-intercalated graphite intercalation compounds (K-GICs) are of particular physical and chemical interest due to their versatile structures and fascinating properties. Fundamental insights into the K+ storage mechanism, and the complex kinetics/thermodynamics that control the reactions and structural rearrangements allow manipulating K-GICs with desired functionalities. Here operando studies including in situ Raman mapping and in situ X-ray diffraction (XRD) characterizations, in combination with density-functional theory simulations are carried out to correlate the real-time electrochemical K+ intercalation/deintercalation process with structure/component evolution. The experimental results, together with theoretical calculations, reveal the reversible K-GICs staging transition: C ↔ stage 5 (KC60) ↔ stage 4 (KC48) ↔ stage 3 (KC36) ↔ stage 2 (KC24/KC16) ↔ stage 1 (KC8). Moreover, the staging transition is clearly visualized and an intermediate phase of stage 2 with the stoichiometric formula of KC16 is identified. The staging transition mechanism involving both intrastage transition from KC24 (stage 2) to KC16 (stage 2) and interstage transition is proposed. The present study promotes better fundamental understanding of K+ storage behavior in graphite, develops a nondestructive technological basis for accurately capture nonuniformity in electrode phase evolution across the length scale of graphite domains, and offers guidance for efficient research in other GICs.en_US
dc.description.sponsorshipMinistry of Education (MOE)en_US
dc.relation.ispartofAdvanced Energy Materialsen_US
dc.rights© 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. All rights reserved.en_US
dc.titleUnraveling the potassium storage mechanism in graphite foamen_US
dc.typeJournal Articleen
dc.contributor.schoolSchool of Materials Science and Engineeringen_US
dc.contributor.schoolSchool of Physical and Mathematical Sciencesen_US
dc.subject.keywordsPotassium-intercalated Graphite Intercalation Compoundsen_US
dc.description.acknowledgementJ.L.L. thanks the financial support from Young Scientists Fund of the National Natural Science Foundation of China (Grant No. 51802091), National Thousand Young Talents Program and the Fundamental Research Funds for the Central Universities (Grant No. 531109200024). J.X.Y. gratefully acknowledges financial support from the National Natural Science Foundation of China (Grant No. 11704185) and the Natural Science Foundation of Jiangsu Province, China (Grant No. BK20171021). Z.X.S. acknowledges the financial support from Ministry of Education, Singapore, Tier 3 (MOE2011-T3-1-005). X.F.F. acknowledges the National Key Research and Development Program from China (Grant No. 2016YFA0200400).en_US
item.fulltextNo Fulltext-
Appears in Collections:MSE Journal Articles
SPMS Journal Articles

Citations 5

Updated on Apr 24, 2021

Citations 5

Updated on Apr 22, 2021

Page view(s)

Updated on Jul 30, 2021

Google ScholarTM




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