Continuous monitoring of the bulk oxidation states in LixNi1/3Mn1/3Co1/3O2 during charging and discharging

Continuous monitoring of the bulk oxidation states in LixNi1/3Mn1/3Co1/3O2 during charging and discharging

Operando magnetic susceptibility measurements on the LixNi1/3Mn1/3Co1/3O2 cathode material during repetitive electrochemical cycling were performed, enabling a continuous and bulk sensitive monitoring of the charge compensation process. Upon charging and Li extraction down to the Li contents of x = ...

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Veröffentlicht in:Applied physics letters 2016-11, Vol.109 (21)
Hauptverfasser: Klinser, G., Topolovec, S., Kren, H., Koller, S., Goessler, W., Krenn, H., Würschum, R.
Format: Artikel
Sprache:eng
Schlagworte:
Applied physics
Charging
Compensation
Electrode materials
Magnetic permeability
Monitoring
Oxidation
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Zusammenfassung:Operando magnetic susceptibility measurements on the LixNi1/3Mn1/3Co1/3O2 cathode material during repetitive electrochemical cycling were performed, enabling a continuous and bulk sensitive monitoring of the charge compensation process. Upon charging and Li extraction down to the Li contents of x = 1/3, exclusively Ni undergoes oxidation in two consecutive steps, namely, Ni2+→Ni3+ for x > 2/3 and Ni3+→Ni4+ for 2/3 > x > 1/3 with a continuous transition in between. In the regime of low Li concentrations x 
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4968547