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Calorimetric Studies on Chemically Delithiated LiNi$_{0.4}$Mn$_{0.4}$Co$_{0.2}$O$_{2}$: Investigation of Phase Transition, Gas Evolution and Enthalpy of Formation

Zhao, Wenjiao; Gebauer, Julian 1; Bergfeldt, Thomas ORCID iD icon 1; Rohde, Magnus 1; Ziebert, Carlos ORCID iD icon 1; Du, Yong; Seifert, Hans J. 1
1 Institut für Angewandte Materialien – Angewandte Werkstoffphysik (IAM-AWP), Karlsruher Institut für Technologie (KIT)

Abstract:

Li1.11(Ni0.4Mn0.4Co0.2)O2 powders were chemically delithiated by (NH4)2S2O8 oxidizer to obtain Lix(Ni0.4Mn0.4Co0.2)O2 powders. The thermal behavior of two delithiated specimens, Li0.76Ni0.41Mn0.42Co0.17O2.10 and Li0.48Ni0.38Mn0.46Co0.16O2.07, was studied compared to the pristine specimen. Phase transitions at elevated temperatures were investigated by simultaneous thermal analysis (STA) and the gas evolution accompanying the phase transitions was analyzed by mass spectroscopy and an oxygen detector. The enthalpy of two delithiated samples and a pristine specimen were measured by a high temperature drop solution calorimeter. Based on these results, the enthalpies of formation were calculated.


Verlagsausgabe §
DOI: 10.5445/IR/1000160005
Veröffentlicht am 30.06.2023
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Angewandte Materialien – Angewandte Werkstoffphysik (IAM-AWP)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2023
Sprache Englisch
Identifikator ISSN: 2313-0105
KITopen-ID: 1000160005
HGF-Programm 38.02.02 (POF IV, LK 01) Components and Cells
Erschienen in Batteries
Verlag MDPI
Band 9
Heft 5
Seiten Art.-Nr.: 275
Vorab online veröffentlicht am 17.05.2023
Schlagwörter chemical delithiation; phase transition; gas evolution; thermal behavior; enthalpy of formation; NMC
Nachgewiesen in Web of Science
Scopus
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