Enabling interfacial stability of LiCoO2 batteries at an ultrahigh cutoff voltage ≥ 4.65 V via a synergetic electrolyte strategy

A 3-dimethylmaleic anhydride (DMMA) additive is proposed to reconcile CEIs, and H 2 O/HF in electrolytes is well scavenged. Moreover, a synergetic electrolyte strategy is applied to push the cutoff voltage of LiCoO 2 batteries up to 4.7 V.