Umicore

Umicore Korea, Ltd.

Wenlong Yang

Jens M Paulsen

Maxime Blangero

Xin Xia

Jing Zhang

A lithium secondary cell having an operating voltage &#x2265;4.35V, comprising a cathode comprising a doped LiCoOactive material, an anode comprising graphite, and an electrolyte comprising a carbonate-based solvent, a lithium salt and both a succinonitrile (SN) and a lithium bis(oxalato)borate (LiBOB) additive wherein during the discharge at 45&#xb0; C. from a state of charge (SOC) of 100% at 4.5V to a SOC of 0 at 3V at a C/10 rate the difference of the SOC at 4.42V and 4.35V is at least 7% but less than 14%, and wherein the active material is doped by at least 0.5 mole % of either one or more of Mn, Mg and Ti.

Lithium battery containing cathode material and electrolyte additives for high voltage application

A lithium secondary cell having an operating voltage &#x2265;4.35 sV, comprising a cathode comprising a doped L1CoOactive material, an anode comprising graphite, and an electrolyte comprising a carbonate-based solvent, a lithium salt and both a succinonitrile (SN) and a lithium bis(oxalato)borate (LiBOB) additive wherein during the discharge at 45&#xb0; C. from a state of charge (SOC) of 100% at 4.5V to a SOC of 0 at 3V at a C/10 rate the difference of the SOC at 4.42V and 4.35V is at least 7% but less than 14%, and wherein the active material is doped by at least 0.5 mole % of either one or more of Mn, Mg and Ti.

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Cheonan, South Korea

Wenlong Yang