정경민 교수

Dry-processed thick cathodes designed with a porous spherical conductive agent exhibit superior electrochemical performances, even with high areal capacities of up to 20 mA h cm −2 and a high composite density of 3.65 g cm −3 .

Reaction heterogeneity is a crucial factor that influences the design of composite electrodes. Silicon–graphite composites exhibit practical use as anodes, but the complex mechanisms in blended electrodes have not been investigated. Considering mechanisms at an electrode level, intra-/interparticle heterogeneity depending on state-of-charge (SOC) becomes problematic due to their complex kinetic properties. We investigate the complex dynamics of a silicon–graphite blended electrode using side-vie

A novel technique for depth filtering of integral imaging is proposed. Integral imaging captures spatio-angular distribution of the light rays which delivers three-dimensional information of the object scene. The proposed method performs filtering operation in the frequency domain of the captured spatio-angular light ray distribution, achieving depth selective reconstruction. Grating projection further enhances the depth discrimination performance. The principle is verified experimentally.

A mathematical model is presented to obtain the current distribution and current efficiency on a rotating disk electrode under controlled current condition. The calculated results compare well with experiments performed using a nickel/nickel sulfate system in the presence of boric acid, The current density is highly nonuniform due to the ohmic drop in the electrolyte. The current efficiency was decreased with the increase of hydrogen concentration as well as applied pulse current density.

Three-dimensional image distortion caused by mismatch between autostereoscopic displays and contents is analyzed. For a given three-dimensional object scene, the original light ray field in the contents and deformed one by the autostereoscopic displays are calculated. From the deformation of the light ray field, the distortion of the resultant three-dimensional image is finally deduced. The light ray field approach enables generalized distortion analysis across different autostereoscopic display

Advanced driver assistance system (ADAS) can recognize traffic signals, vehicles, pedestrians, and so on all over the vehicle. However, because the ADAS is based on images taken in an outdoor environment, it is susceptible to ambient weather such as fog. So, preprocessing such as de-fog and de-hazing techniques is required to prevent degradation of object recognition performance due to decreased visibility. But, if such a fog removal technique is applied in an environment where there is little o

• Electrode curvature in cylindrical LIBs affects N/P ratio, causing capacity variations and lithium-metal deposition. • High-nickel cathodes show increased sensitivity to curvature. • Tailored design strategies are proposed to mitigate curvature effects on cell performance. Cylindrical lithium-ion batteries offer several advantages over their flat-body counterparts, including a more robust structure. However, their inherent electrode curvature restricts both electrochemical performance and stab

The time-averaged current distribution over the surface of a rotating-disk electrode is calculated under conditions of periodic current reversal by simultaneously solving the transient-convective-diffusion equation and Laplace's equation. The calculated results compare well with experiments performed using the copper/copper sulfate system. The grid search technique is used to determine the optimum plating conditions in terms of uniform thickness of electrodeposits by varying the duty fa