A nonflammable electrolyte for ultrahigh-voltage (4.8 V-class) Li||NCM811 cells with a wide temperature range of 100 °C

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A nonflammable electrolyte has been designed to enhance the interfacial stability and electrochemical kinetics for lithium metal batteries. As a result, Li||NCM811 cells show stable cycling stability at an ultrahigh cut-off voltage of 4.8 V.