Our lithium-metal battery delivers a specific capacity >230 mA h g −1 and an average Coulombic efficiency >99.65% over 100 cycles. In contrast to commercial carbonate electrolytes, the electrolyte not only suppresses side reactions, stress-corrosion cracking, transition-metal dissolution and impedance growth on the cathode side, but also enables highly reversible Li metal stripping and plating leading to a compact morphology and low pulverization. Here we report that a rationally designed sulfonamide-based electrolyte enables stable cycling of commercial LiNi 0.8Co 0.1Mn 0.1O 2 with a cut-off voltage up to 4.7 V in Li metal batteries. However, stable cycling of high-nickel cathodes at ultra-high voltages is extremely challenging.
Nature Energy volume 6, pages 495–505 ( 2021) Cite this articleīy increasing the charging voltage, a cell specific energy of >400 W h kg −1 is achievable with LiNi 0.8Mn 0.1Co 0.1O 2 in Li metal batteries.
Ultra-high-voltage Ni-rich layered cathodes in practical Li metal batteries enabled by a sulfonamide-based electrolyte
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