Three-Dimensional Copper Foil-Powder Sintering Current Collector for a Silicon-Based Anode Lithium-Ion Battery

Abstract

In this work, we propose a facile method for manufacturing a three-dimensional copper foil-powder sintering current collector (CFSCC) for a silicon-based anode lithium-ion battery. We found that the CFSCC is suitable as a silicon-based paste electrode, and the paste-like electrodes are commonly used in industrial production. Compared with flat current collectors, the CFSCC better constrained the silicon volume change during the charging-discharging process. The capacitance of electrodes with CFSCC remained as high as 92.2% of its second cycle after 40 cycles, whereas that of electrodes with a flat current collector only remained at 50%.

Effects of Electrolytic Copper Foil Roughness on Lithium-Ion Battery Performance

“…In recent years, lithium-ion batteries (LIBs) have been widely used in communication, electronics, transportation, and other fields due to their high energy density and long cycle life, and they play an important role in modern society [1][2][3][4]. Current collectors, as matrix materials used to carry active materials and transport electrons, are an indispensable part of LIBs [5][6][7][8]. At present, the anode current collector of commercial LIBs is mainly electrolytic copper foil, but research on its structure and performance is still lacking [9,10].…”