Overcharge protection of lithium-ion batteries above 4 V with a perfluorinated phenothiazine derivative

Kaur, Aman Preet; Casselman, Matthew D.; Elliott, Corrine F.; Parkin, Sean R.; Risko, Chad; Odom, Susan A.

Overcharge protection of lithium-ion batteries above 4 V with a perfluorinated phenothiazine derivative

2016

Electron-withdrawing substituents are introduced onto the phenothiazine core to raise its oxidation potential for use as a redox shuttle in high-voltage lithium-ion batteries. A perfluorinated derivative oxidizes at 4.3 V vs. Li⁺/⁰, and functions for ca. 500 h of 100% overcharge in LiNi₀.₈Co₀.₁₅Al₀.₀₅O₂/graphite coin cells at a charging rate of C/10.

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