Unraveling the impact of the design of current collector on dry-processed lithium-ion battery electrodes

The impact of the current collectors on the adhesion, electron conductivity and electrochemical performance of the dry-processed cathodes is investigated for the first time. The carbon-coated Al foil have high electrical conductivity, can regulate electrons transport, and strong adhesion strength enable the higher electrochemical performance. [Display omitted] Dry processing emerges as a cost-effective technique for achieving high material loading in the field of lithium-ion battery fabrication. Nevertheless, insight into the role of current collectors in this process is still scarce. Herein, a set of dry-processed electrodes with three different current collectors is accordingly prepared and comprehensively studied. This work novelly reveals that the current collectors exhibit significant influence on the interface adhesion strength and the electron conductivity, which leads to difference in the mechanical strength and electrochemical performance of dry-processed electrodes. Consequently, it is recommended that carbon-coated current collector is preferred for dry-processed high energy density lithium-ion battery electrodes.