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Lithium Phosphonate Functionalized Polymer Coating for High-Energy Li[Ni$_{0.8}$Co$_{0.1}$Mn$_{0.1}$]O$_{2}$ with Superior Performance at Ambient and Elevated Temperatures

Chen, Zhen 1; Nguyen, Huu-Dat; Zarrabeitia, Maider ORCID iD icon 1; Liang, Hai-Peng 1; Geiger, Dorin; Kim, Jae-Kwang; Kaiser, Ute; Passerini, Stefano 1; Iojoiu, Cristina; Bresser, Dominic 1
1 Karlsruher Institut für Technologie (KIT)


High-energy Ni-rich lithium transition metal oxides such as Li[Ni$_{0.8}$Co$_{0.1}$Mn$_{0.1}$]O$_{2}$ (NCM$_{811}$) are appealing positive electrode materials for next-generation lithium batteries. However, the high sensitivity toward moist air during storage and the high reactivity with common organic electrolytes, especially at elevated temperatures, are hindering their commercial use. Herein, an effective strategy is reported to overcome these issues by coating the NCM$_{811}$ particles with a lithium phosphonate functionalized poly(aryl ether sulfone). The application of this coating allows for a substantial reduction of lithium-based surface impurities (e.g., LiOH, Li$_{2}$CO$_{3}$) and, generally, the suppression of detrimental side reactions upon both storage and cycling. As a result, the coated NCM811-based cathodes reveal superior Coulombic efficiency and cycling stability at ambient and, particularly, at elevated temperatures up to 60°C (a temperature at which the non-coated NCM$_{811}$ electrodes rapidly fail) owing to the formation of a stable cathode electrolyte interphase with enhanced Li$^{+}$ transport kinetics and the well-retained layered crystal structure. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000136619
Veröffentlicht am 23.08.2021
DOI: 10.1002/adfm.202105343
Zitationen: 60
Zitationen: 61
Cover der Publikation
Zugehörige Institution(en) am KIT Helmholtz-Institut Ulm (HIU)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 08.10.2021
Sprache Englisch
Identifikator ISSN: 1616-301X, 1616-3028
KITopen-ID: 1000136619
HGF-Programm 38.02.01 (POF IV, LK 01) Fundamentals and Materials
Erschienen in Advanced functional materials
Verlag Wiley-VCH Verlag
Band 31
Heft 41
Seiten Art. Nr.: 2105343
Vorab online veröffentlicht am 16.07.2021
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