| 초록 |
As energy storage continues to increase due to the expansion of the electric vehicle market and stationary applications, one of the problems with lithium-ion batteries is the cost and environmental impact of manufacturing. Currently, the electrodes for Lithium-ion Batteries are made with a slurry casting procedure (wet-mixing). The disadvantages of this mixing method include the use of toxic and costly solvents as well as significant quantity of energy required for solvent evaporation and recycling. Here in, We report solvent-free process (dry-mixing) that are simpler infrastructure and manufactural procedure, cost-effective, and environmentally friendly LIBs than wet-mixing. The dry-mixing electrode fabrication is a continuous process. We uniformly mixed electrode materials powders comprising an active material with CNT and the soft polymer binder in mixer. The powder continuously extruded a freestanding electrode film and it is laminated onto a current collector through the gap between many rolls of a roll-mill. Accordingly, we developed Continuous mixer-cotter-press for dry manufacturing with high active material ratio and energy density dry thick cathode electrode for Lithium-ion Batteries (＞300wh/kg). The high energy density thick cathode electrode (~40 mg/cm2) showed good electrochemical as a Li-ion battery performance in terms of high capacity and cyclability. This innovative manufacturing and fabrication process demonstrates the high areal energy and power density, which is a critical requirement for energy storage systems in electric vehicle market and stationary applications. |
