Abstract: The present invention provides: a method for preparing a petcoke-based artificial graphite negative electrode material for a lithium secondary battery, in which low-grade petcoke is used as a raw material, and artificial graphite having a high degree of graphitization is prepared through leaching and acid treatment of pulverized/classified low-grade petcoke in an acidic solution, followed by carbonization and graphitization; an artificial graphite negative electrode material for a lithium secondary battery, prepared thereby; and a lithium secondary battery.

Abstract: Provided are a method for manufacturing a high yield and high performance mesophase pitch and a high yield and high performance mesophase pitch manufactured therefrom by hydrogenating, mesophase formation, thin film evaporation, solvent-extracting, filtering and then drying to obtain only mesogen components in flow-domained mesophase pitch and then mixing the mesogen components with an isotropic pitch as a solvent component. Further, the high yield mesophase pitch of the present disclosure exhibits high spinnability while maintaining whole anisotropy and exhibits a much higher production yield than existing mesophase pitches.

Abstract: The present disclosure relates to a neuron behavior-imitating electronic synapse device and a method of fabricating the same. According to one embodiment, the neuron behavior-imitating synapse device includes a first electrode having a lithium-doped surface, an active layer formed on the first electrode and including a polyelectrolyte and one or more metal nanoparticles, and a second electrode formed on the active layer.

Abstract: Disclosed are a photodetector using a photoelectric conversion effect wherein current changes according to light; and a method of manufacturing the photodetector. More particularly, a photodetector manufactured using a transition metal dichalcogen compound having high sensitivity to wavelengths of light in the visible light region by forming a sensor layer utilizing a transition metal dichalcogen compound such that the thickness of the sensor layer can be adjusted is provided.

Abstract: The present disclosure relates to a method of preparing an anisotropic pitch for carbon fiber, and more particularly, to a method of preparing an anisotropic pitch of preparing a pitch having a low softening point by thermally polymerizing heavy oil or residue oil generated in an oil refining process, extracting only a mesogen component, and then heat-treating at a high temperature for a short time. The anisotropic pitch prepared in the present disclosure has advantages of exhibiting the anisotropic content of 100% and controlling the anisotropic content only a simple temperature control as desired and may be used as a precursor of a high value-added carbon material such as carbon fiber and an anode material for a lithium secondary battery.

Abstract: Disclosed are a photodetector using a photoelectric conversion effect wherein current changes according to light; and a method of manufacturing the photodetector. More particularly, a photodetector manufactured using a transition metal dichalcogen compound having high sensitivity to wavelengths of light in the visible light region by forming a sensor layer utilizing a transition metal dichalcogen compound such that the thickness of the sensor layer can be adjusted is provided.

Abstract: The present disclosure relates to a neuron behavior-imitating electronic synapse device and a method of fabricating the same. According to one embodiment, the neuron behavior-imitating synapse device includes a first electrode having a lithium-doped surface, an active layer formed on the first electrode and including a polyelectrolyte and one or more metal nanoparticles, and a second electrode formed on the active layer.

Abstract: The present invention relates to a method for producing an impregnated pitch from a petroleum-based raw material and to an impregnated pitch produced using the same, and when the method for producing an impregnated pitch according to the present invention is used, it is possible to produce an impregnated pitch having a high carbonization yield (40 wt % or more) and low quinoline insoluble matter (QI, 2% or less) for improving efficiency of an impregnation process from a petroleum-based raw material. Therefore, when an impregnation process is applied to a carbon compact by using the impregnated pitch according to the present invention, it is possible to remarkably reduce micropores inside the carbon compact, and to produce a carbon compact having physical properties such as excellent electrical conductivity and mechanical strength.

Abstract: The present invention relates to a method for producing an impregnated pitch from a petroleum-based raw material and to an impregnated pitch produced using the same, and when the method for producing an impregnated pitch according to the present invention is used, it is possible to produce an impregnated pitch having a high carbonization yield (40 wt % or more) and low quinoline insoluble matter (QI, 2% or less) for improving efficiency of an impregnation process from a petroleum-based raw material. Therefore, when an impregnation process is applied to a carbon compact by using the impregnated pitch according to the present invention, it is possible to remarkably reduce micropores inside the carbon compact, and to produce a carbon compact having physical properties such as excellent electrical conductivity and mechanical strength.

Abstract: There are disclosed a temperature sensor and a method for manufacturing the same. The temperature sensor comprises; a sensor unit including an organic light emitting layer including a delayed fluorescent material; a temperature transfer unit located below the sensor unit to transfer an external temperature to the sensor unit; a first electrode located on the sensor unit; a second electrode located below the sensor unit to be spaced apart from the temperature transfer unit; and a light intensity measuring unit located below the second electrode and measuring the intensity of light emitted from the organic light emitting layer. The temperature sensor can measure a temperature by using a change in the intensity of light using delayed fluorescence, thereby providing improved sensitivity.

Abstract: There are disclosed a temperature sensor and a method for manufacturing the same. The temperature sensor comprises; a sensor unit including an organic light emitting layer including a delayed fluorescent material; a temperature transfer unit located below the sensor unit to transfer an external temperature to the sensor unit; a first electrode located on the sensor unit; a second electrode located below the sensor unit to be spaced apart from the temperature transfer unit; and a light intensity measuring unit located below the second electrode and measuring the intensity of light emitted from the organic light emitting layer. The temperature sensor can measure a temperature by using a change in the intensity of light using delayed fluorescence, thereby providing improved sensitivity.