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2016
DOI: 10.1016/j.matdes.2016.03.121
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Fluorination of free lithium residues on the surface of lithium nickel cobalt aluminum oxide cathode materials for lithium ion batteries

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Cited by 25 publications
(16 citation statements)
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“…Kim et al demonstrated this kind of stable surface layer by transforming Li 2 CO 3 and LiOH phases on the surface of the cathode material to metal fluorides by fluorination in the NH 4 FHF solution. [136] TheAlF 3 or fluorinated Al 2 O 3 coating was also proven to be aprotective layer that could limit SEI formation with high resistance and facilitate the electrochemical reaction of the cathode materials. [74,137] Recently,C ui et al used ALD to develop aL iAlF 4 solid thin film with robust stability and satisfactory ion conductivity that is superior to the commonly used LiF and AlF 3 .…”
Section: Halide-based Bulk Doping and Surface Modifications Of Electrmentioning
confidence: 99%
“…Kim et al demonstrated this kind of stable surface layer by transforming Li 2 CO 3 and LiOH phases on the surface of the cathode material to metal fluorides by fluorination in the NH 4 FHF solution. [136] TheAlF 3 or fluorinated Al 2 O 3 coating was also proven to be aprotective layer that could limit SEI formation with high resistance and facilitate the electrochemical reaction of the cathode materials. [74,137] Recently,C ui et al used ALD to develop aL iAlF 4 solid thin film with robust stability and satisfactory ion conductivity that is superior to the commonly used LiF and AlF 3 .…”
Section: Halide-based Bulk Doping and Surface Modifications Of Electrmentioning
confidence: 99%
“…However, Ni-rich layered oxides show poor cyclability at high operating temperatures (> 45 8C) and high voltages (> 4.3 V) because of the presence of reactive and unstable Ni 4 + ions in the delithiated state. [3][4][5][6] Thep resence of unreacted lithium on the surface of Ni-rich layered oxides leads to the formationo fl ithium impurities (termed residual lithium) such as lithium carbonates (Li 2 CO 3 )a nd lithium hydroxides (LiOH). These species are extremely prone to reactions with atmospheric carbond ioxide (CO 2 )and moisture.…”
Section: Introductionmentioning
confidence: 99%
“…[132] Des Weiteren stellten Chang et al fest, dass die Iod-dotierten roten Phosphor-Nanopartikel (RPNPs), die durch die Reaktion von PI 3 mit Ethylenglycol in Gegenwart von Cetyltrimethylammoniumbromid aufbereitet wurden, eine hohe elektrische Leitfähigkeit von bis zu 1.81 10 À2 Sm À1 besaßen (Abbildung 7). Dieser Wert kommt nahe an den des Halbleiters Germanium (1.02 10 À2 Sm À1 )h eran und ist 10 10 -fach hçher als der von kommerziellem rotem Phosphor.F olglich konnte eine hervorragende elektrochemische Leistung fürdie RPNP-Elektrode mit einer reversiblen Kapazitätv on rund 1562 mAh g À1 nach 150 Zyklen erreicht werden, [133] [135] was den Verlust von [136] Es wurde ebenso bewiesen, dass die AlF 3 -oder fluorierte Al 2 O 3 -Beschichtung eine Schutzschicht darstellt, welche mit hohem Widerstand die Bildung der SEI beschränken kann und die elektrochemische Reaktion der Kathodenmaterialien begünstigt. [74,137] [76] Ein ähnlicher Ansatz, um Polysulfid-Spezies unbeweglich zu machen, wurde fürd ie Iod-dotierten Graphenmaterialien genutzt.…”
Section: Eine Aktuellere Studie Von Wang Et Al Vermeldete Ein Neuesunclassified