Enhanced interfacial bonding for boosting the performance of lithium-ion batteries through an etched ordered checkerboard patterns on current collectors

The cycle life of lithium-ion batteries (LIBs) is significantly influenced by the interfacial bonding between the current collector and the active material. Suppressing the volume expansion and material shedding problems caused during the charge/discharge process plays an important role in the development of LIBs. Herein, a regular checkerboard pattern current collector was prepared by an efficient chemical etching method for LIBs. The interfacial bonding of electrode was enhanced owing to the increased effective surface area and structural features of the modified current collector. Meanwhile, peeling test and a set of in-situ measurement device confirmed that the modified current collector can effectively inhibit the shedding of active materials from the electrode, and the material adhesion strength was improved. The electrochemical performance of the LIBs was greatly augmented, and the current collector after 30 s of etching was used for composite electrodes, which maintained its stability for 83 cycles, and the capacity retention rate reached 87.3 % after 100 cycles.