Asymmetric imides as electrolyte additive for lithium ion batteries with NCM111 cathode

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Abstract: The synthesis, spectroscopic and electrochemical characterization of Li[N(SiMe 3 )(SO 2 R F )] (R F = CF 3 , n ‐C 4 F 9 ) as well their behavior as electrolyte additive in lithium ion batteries (LIBs) is reported. The lithium salts were obtained by deprotonation of the corresponding acids HN(SiMe 3 )(SO 2 R F ) with n ‐butyllithium in n ‐pentane. The electrochemical investigations suggested potential as additives for LIBs. Thus, NCM111/graphite cells (NCM111 = Li[Ni 0.33 Co 0.33 Mn 0.33 ]O 2 ) with LP57 as electrolyte (LP57 = 1.0 M LiPF 6 in EC/EMC 3:7) were built to test the performance. Cells with Li[N(SiMe 3 )(SO 2 R F )] as additives show coulombic efficiencies of over 99.6 %, less capacity fading over 55 cycles and a significantly lower cell impedance built up

Standort
Deutsche Nationalbibliothek Frankfurt am Main
Umfang
Online-Ressource
Anmerkungen
ChemElectroChem. - 7, 9 (2020) , 2107-2113, ISSN: 2196-0216

Klassifikation
Elektrotechnik, Elektronik
Schlagwort
Additiv
Elektrochemie
Lithium-Ionen-Akkumulator
Schwefel

Ereignis
Veröffentlichung
(wo)
Freiburg
(wer)
Universität
(wann)
2020
Urheber

DOI
10.1002/celc.202000277
URN
urn:nbn:de:bsz:25-freidok-1552406
Rechteinformation
Der Zugriff auf das Objekt ist unbeschränkt möglich.
Letzte Aktualisierung
25.03.2025, 13:48 MEZ

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  • 2020

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