Determining the oxidation states of dissolved transition metals in battery electrolytes from solution NMR spectra

Determining the oxidation states of dissolved transition metals in battery electrolytes from solution NMR spectra

Dissolved transition metal ions can induce peak shifts in the NMR spectra of degraded battery electrolytes. Here, we exploit this staightforward, accessible method to calculate magnetic moments for dissolved Ni 2+ , Mn 2+ , Co 2+ , and Cu 2+ ; subsequent analysis of dissolution from LiMn 2 O 4 , LiN...

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Veröffentlicht in:Chemical communications (Cambridge, England) England), 2023-02, Vol.59 (12), p.1677-168
Hauptverfasser: Allen, Jennifer P, Grey, Clare P
Format: Artikel
Sprache:eng
Schlagworte:
Batteries
Cobalt
Electrolytes
Lithium manganese oxides
Magnetic moments
NMR
Nuclear magnetic resonance
Oxidation
Spectra
Transition metals
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Zusammenfassung:Dissolved transition metal ions can induce peak shifts in the NMR spectra of degraded battery electrolytes. Here, we exploit this staightforward, accessible method to calculate magnetic moments for dissolved Ni 2+ , Mn 2+ , Co 2+ , and Cu 2+ ; subsequent analysis of dissolution from LiMn 2 O 4 , LiNiO 2 , and LiNi 0.5 Mn 1.5 O 4 shows that the dissolved metals are exclusively divalent. Solution NMR of battery electrolytes reveals the oxidation states of metals dissolved from battery cathodes.
ISSN:1359-7345
1364-548X
DOI:10.1039/d2cc06655f