This technology concerns a method of producing D-glucaric acid, which can be used as a monomer for bio-based plastic, and a method of converting D-glucuronic acid obtained from green algae to D-glucaric acid using recombinant microorganisms introduced with D-glucaric acid production genes.
The existing starch-based raw material is grains, which are edible crops. The use of lignocellulose from woody or herbaceous plants, which is an inedible biomass, has the disadvantage of requiring a complex and expensive pretreatment process to remove lignin, a non-degradable aromatic polymer. To solve this problem, this technology introduces only two genes using seaweed, a non-edible biomass, so it can shorten the existing complex reaction and proposes a method to effectively produce D-glucaric acid.
The seaweed biomass used in this technology has a faster growth rate than terrestrial biomass, can be cultivated in large quantities in the ocean, and has an excellent carbon dioxide absorption ability, allowing it to be used as a raw material for next-generation bioplastics. Since it does not contain lignin, it is easy to saccharify, so it will be in the spotlight as a biomass.
This technology was developed through support from the Korea Institute for Ocean Science and Technology Advancement's research project to produce next-generation BIO-BASED POLYMER through the development of new technology for bioconversion of sugars derived from green algae.'
This technology is related to metal cathode electrodes and secondary batteries using them.
The problem that this technology aims to solve is a metal cathode electrode with suppressed dendrite growth. To this end, we propose a mesoporous structure in which the surface area is increased by nanopores on the inner surface of the concave part.
This technology not only inhibits the growth of lithium ions into lithium metal dendrites by nanopores and oxygen functional groups, but also suppresses the generation of by-products within the cathode electrode, and the effect of this is to prevent long-term charge and discharge cycles. It has outstanding advantages of high efficiency and stability.
This technology was developed through the support of the National Research Foundation of Korea's research project to identify the formation mechanism and redox characteristics of highly functional pyropolymers rich in pi electrons.
This technology is about a device that can collect samples existing in the water.
The importance of deep-sea exploration is emerging due to the depletion of energy resources on land and various reasons, but the method of collecting large quantities of samples by dragging the existing trawl net by boat has the problem of not only being inconvenient in having to do the work with a large boat, but also being unsuitable when collecting samples in a narrow area. In order to solve these problems, this technology proposes a new underwater sampling device that can collect samples that exist underwater or in the deep sea.
This technology not only makes it possible to easily collect samples from the deep sea using a small amount of force, and easily collects deep sea samples in a narrow area, but also makes it possible to easily collect deep sea samples without a separate external power supply.
This technology relates to an electrode active material containing tellurium nanotubes with a conductive polymer layer and a method of manufacturing electrodes for secondary batteries.
The technology of using sodium, aluminum, zinc, etc. in the negative electrode is attracting attention as it increases the stability of secondary batteries and is highly price competitive, but there is a problem in that intermediate materials dissolve in the electrolyte during the charging and discharging process, creating a shuttle effect that travels between both electrodes. In order to solve this problem, this technology proposes a technology to synthesize tellurium material in the form of nanotubes and coat it with a conductive polymer.
By using tellurium nanotubes formed with a conductive polymer layer through this technology as an electrode active material, it is more economical than the existing technology of manufacturing electrode active materials by supporting them in a host material to suppress the elution of intermediate materials, and can further contribute to commercialization. The advantage is that the specific gravity of the active material in the electrode does not decrease, increasing energy density. There is.
This technology relates to a method of manufacturing a high-quality, large-area metal chalcogenide thin film with uniform thickness and composition by coating a polymer-precursor solution containing a polymer and a metal chalcogenide compound precursor on a substrate, and a method of manufacturing an electronic device containing the metal chalcogenide thin film.
Semiconductor metal chalcogenide has an appropriate band gap and an electron mobility of hundreds of cm2/V·s. Since it is visible, it is suitable for application in semiconductor devices such as transistors and has great potential for flexible transistor devices, but there is a problem in that it is difficult to satisfy these conditions when making a thin film in a solution. To solve this problem, this technology proposes a new concept of forming a polymer thin film layer on the substrate to ensure that all reactions occur only at the interface of the substrate.
The method of manufacturing metal chalcogenide thin films according to this technology is not only effective in providing high-quality thin films with a large area of 6 inches or more with uniform thickness and composition through low production costs and simple processes, but also electronic devices containing large-area metal chalcogenide thin films can have high charge mobility and modulate band structure according to thickness, and can implement flexible substrates, so they can be applied to various fields such as high-performance transistors, optical devices, catalysts, and energy materials.
This technology was developed through support from the National Research Foundation of Korea's research project on solution-based direct growth and micropatterning of metal chalcogen ultrathin films on large-area flexible substrates.'
This technology is about the manufacturing method of the electrode material for the negative electrode of lithium metal secondary battery.
The use of lithium metal as the negative electrode for high-performance next-generation secondary batteries is attracting attention, but it has stability problems such as ignition and explosion due to dendrite metal growth. To solve these problems, this technology proposes a method of synthesizing nitrogen-doped pseudo-capacitance nanocarbon through arc discharge.
This technology proposes a method of synthesizing nitrogen-doped pseudo-capacitance nanocarbon through arc discharge. It is expected to contribute to the development of the secondary battery industry as a groundbreaking lithium metal secondary battery anode electrode that can not only improve the performance of secondary batteries by reducing phase transition resistance and concentration resistance, but also secure high coulombic efficiency and stability even during repeated charge and discharge cycling through secondary battery electrodes with a solid electrolyte interface layer with high ion conductivity.
This technology was developed through the support of the National Research Foundation of Korea's research project to identify the formation mechanism and redox characteristics of highly functional pyropolymers rich in pi electrons.
This technology concerns organic semiconductor compounds and organic electronic devices into which electron donor units have been introduced.
Existing n-type organic semiconductor compounds have a high LUMO (lowest unoccupied molecular orbital) energy level and low planarity, making it difficult to apply them to devices such as p-n-7 junction transistors and organic solar cells. To solve this problem, this technology proposes a compound with a low LUMO energy level by introducing an electron donor monomer and improved interconnectivity through non-covalent interactions between molecules.
The organic electronic devices of compounds using this technology show improved stability and electron mobility.
This technology was developed through support from the National Research Foundation of Korea's Pi Electronic Molecular Soft Nanomaterials research project.
This technology relates to an oxidation-reduction catalyst for a metal-air battery, an air electrode, and a membrane-electrode assembly for a metal-air battery including the same.
Lithium-air batteries have an energy density that is more than 10 times higher than existing lithium batteries, making them promising as next-generation secondary batteries. However, there is a problem in that current density and lifespan characteristics deteriorate when lithium oxide (Li2O2) accumulates through repeated charging and discharging. To solve this problem, this technology proposes a method to reduce the permeation of redox mediator (RM) through the separation membrane.
This technology can not only improve the performance of metal-air batteries by reducing the permeation of redox mediators through the separator during charging and discharging, but also prevent the crossover phenomenon of redox mediators.
This technology was developed through support from the National Research Foundation of Korea's research project for a high current density water electrolysis system using a lithium ion exchange membrane.
This technology is about a multi-sensor with a nano-suspended structure and a method that can improve multiple sensing capabilities and sensitivity characteristics.
Electrochemical sensors are generally manufactured in the form of a lab-on-a-chip for the purpose of real-time chemical substance identification and disease diagnosis, and the existing nanostructure sensor in the form of a lab-on-a-chip has a fluid flow formed in a direction parallel to the semiconductor substrate of the sensor, takes a long time to react, and requires a lot of reaction time and There is a problem in that the reaction sensitivity is low because the absolute amount of target substance that reacts is limited. To solve this problem, we propose a multi-sensor with a nano-suspended structure that enables multiple detections simultaneously and reduces the detection time by connecting multiple unit sensors formed in block units through one S-shaped microfluidic channel.
This technology is a groundbreaking technology that physically captures the target material and secondarily chemically captures the target material with the receiving material, increasing the chance of reaction, improving sensitivity and shortening the detection time, and at the same time detecting even a very small amount of the target material.
This technology was developed through the support of the National Research Foundation of Korea's research project on next-generation low-power, high-speed interconnect circuit and convergence design for 3D IC SIP using silicon interposer and chip stacking techniques.
This technology is about the manufacturing method of iron-doped cathode active material.
Among the cathode materials used in lithium-ion batteries, LiMn2O4 (LMO) is a promising material because it is environmentally friendly and inexpensive, but has the disadvantage of having an unstable structure, causing manganese to dissolve into the electrolyte. To improve these problems, this technology proposes a method of doping iron into lithium manganese oxide.
The cathode active material according to this technology can improve structural stability and electrochemical properties by doping iron into lithium manganese oxide, and is environmentally friendly by using relatively inexpensive iron, while also having an economical advantage in manufacturing cost, which is expected to contribute to improving the competitiveness of the secondary battery industry.
This technology was developed through support from the National Research Foundation of Korea's functional interface structure research project for lithium cathode-based high-capacity energy storage.
This technology is about an image processing method and a way to remove blur from images.
Blur is one of the main causes of image quality deterioration. Often, when the exposure time is long, blur may occur in the acquired image due to the shaking of the image sensor. In order to improve this problem, this technology proposes a method for removing non-uniform motion blur using estimated non-uniform motion blur information and multi-frames using multi-frames containing non-uniform motion blur.
This technology estimates non-uniform motion blur information using the local area of the multi-frame image, and uses the estimated non-uniform motion blur information to remove the blur of the multi-frame of the original resolution. Not only can it achieve clear image quality, but it can also improve the speed of removing blur from images with large resolution.
This technology is about the manufacturing method of a quaternary cathode active material.
When synthesizing a quaternary precursor with additional aluminum introduced in an existing ternary system, it is difficult to synthesize the material when using the coprecipitation method, and in particular, an additional aluminum doping process must be added after synthesizing the ternary NCM precursor, which has the disadvantage of making the process complicated. To solve this problem, this technology proposes the use of solvothermal synthesis.
The method for producing a positive electrode active material according to this technology has fewer control variables compared to the coprecipitation method, does not require the introduction of an additional aluminum doping process, and uses a simple solvothermal synthesis method without changing the existing process. Therefore, it is possible to synthesize a quaternary cathode active material precursor (NCMA precursor) containing aluminum in the precursor synthesis step, and it is expected to increase the commercial applicability of quaternary positive active materials by enabling the synthesis of high-quality spherical positive electrode active materials with uniform sizes.
This technology was developed through support from the National Research Foundation of Korea's functional interface structure research project for lithium cathode-based high-capacity energy storage.
This technology relates to a method of manufacturing carbon nanotubes, and a method of synthesizing various types of carbon nanotubes by controlling the injection timing of raw materials using the decomposition temperature of the material.
The physical properties of carbon nanotubes are determined by the diameter and chirality of the nanotubes, but existing technologies have the disadvantage of having to remove the support after synthesizing nanotubes because it is difficult to obtain catalysts of constant and uniform size. This technology proposes a method for manufacturing carbon nanotubes that can control the physical properties of synthesized carbon nanotubes using the decomposition temperature, which is a unique physical property of the material.
This is a groundbreaking technology that can create carbon nanotubes of various shapes by changing the injection method of catalysts, additives, and carbon sources.
This technology was developed through support from the National Research Foundation of Korea's ultimate tensile strength carbon nanotube fiber manufacturing technology research project.
This technology is about the manufacturing method of a composite for the functional transmission layer of a high-capacity lithium-sulfur battery
Lithium-sulfur batteries, which are emerging as a new alternative, have high theoretical capacity and high energy density and are being studied as next-generation batteries. However, the shuttle phenomenon, which is a problem of lithium-sulfur batteries, must be alleviated and the electrical conductivity of sulfur must also be improved. To achieve this goal, this technology proposes a method using reduced graphene oxide and porous vanadium nitride.
This technology can alleviate the shuttle phenomenon of lithium-sulfur batteries by improving the adsorption capacity with lithium polysulfide and promoting oxidation-reduction dynamics. It has excellent electrical conductivity and improves the utilization of sulfur by compensating for the low electrical conductivity of sulfur. This technology has the advantage of cycle stability and high capacity, and is expected to greatly contribute to the commercialization of lithium-sulfur secondary batteries.
This technology was developed through support from the National Research Foundation of Korea's functional interface structure research project for lithium cathode-based high-capacity energy storage.
This technology relates to a method of manufacturing an active optical waveguide, which includes quantum dots that can fluoresce and amplify optical signals, and forms the quantum dots using a continuous oscillation laser.
With the existing technology, it is not easy to control the size or distribution while maintaining the characteristics of the quantum dots, and the process costs are high, making quantum dots practically impossible. There was a problem with not being able to utilize it. In order to solve this problem, this technology proposes a method of manufacturing a buried active optical waveguide containing quantum dots by inducing the precipitation of quantum dots in glass using a continuous oscillation laser.
By doing so, not only can a buried optical waveguide of the desired shape be manufactured, but it can also be very usefully applied in the fields of electronic device and optical irradiation manufacturing.
This technology was developed through support from the National Research Foundation of Korea's research project on nanocrystal-containing optical glass for optoelectronic devices.
