Cathode for lithium batteries

The present invention relates to electrode composite, comprising: 0.1 wt% to 20 wt% graphene; 0.1 wt% to 20 wt% carbon black and 2 wt% to 20 wt% binder, the rest being an active material of lithium transition metal oxide having a spinel structure, such as LiNi0.5Mn1.5O4 or LiMn2O4, or of a lithium transition metal compound having an olivine structure, such as LiFePO4, and presenting the electrode a thickness equal or greater than 40 [mu]m. The invention also relates to a cathode comprising a current collector and disposed on the current collector said electrode composite, to a lithium ion cell and to a battery module comprising said cathode, and to a battery pack comprising at least one battery module for use in devices such as electric vehicles, portable electric devices and stationary energy storage devices for renewable sources. The invention also discloses a method for preparing said cathode. 本发明涉及电极复合材料，包括：0.1wt％至20wt％的石墨烯；0.1wt％至20wt％的碳黑和2wt％至20wt％的粘合剂，其余的为具有尖晶石结构的锂过渡金属氧化物(诸如LiNiMnO或LiMnO)或具有橄榄石结构的锂过渡金属