This technology relates to a zinc/carbon structure combining zinc metal with a carbon current collector derived from bacterial cellulose to improve anode performance in aqueous zinc secondary batteries.
Conventional aqueous zinc anodes have suffered from interfacial instability and by-product formation in aqueous electrolytes, which reduce reaction efficiency and lifespan. This technology applies a bacterial-cellulose-based carbon current collector to stabilize current distribution and ion adsorption/reduction behavior while providing an environment for uniform zinc growth.
As a result, it can reduce concentration resistance and side reactions while improving anode efficiency and long-term stability, thereby contributing to enhanced performance of aqueous zinc batteries.
Key Features:
This technology relates to a lithium secondary battery anode that improves interfacial stability by using a carbon current collector derived from bacterial cellulose and a lithium-compound layer.
Conventional lithium-metal anodes have suffered from low coulombic efficiency, electrolyte decomposition, volume change, and dendritic growth, resulting in poor stability. This technology forms a stable lithium-compound layer on a carbon current collector to control ion permeation and interfacial reactions.
As a result, it can reduce electrolyte decomposition and improve coulombic efficiency and rate performance, thereby contributing to enhanced energy density and output performance of lithium secondary batteries.
Key Features:
This technology relates to a self-fused CuS anode having a three-dimensional nanoporous structure, designed to improve storage capacity and cycle life in sodium secondary batteries.
Conventional copper sulfide anodes have suffered from low capacity and rapid performance degradation, limiting practical use. This technology improves both active-material loading and ion-diffusion characteristics through composition design, anode formation on a current collector, and conversion into a three-dimensional porous structure.
As a result, it can improve the capacity retention and long-term cycling characteristics of CuS anodes, contributing to higher-performance sodium secondary batteries.
Key Features:
This technology relates to a solid electrolyte having high ionic conductivity and an increased lithium-ion transference number, and to a lithium secondary battery including the same.
Conventional liquid electrolytes have had low safety because of flammability and high reactivity, and they have also faced limitations in forming stable interfaces for suppressing lithium dendrites. This technology applies an electrochemically stable solid-electrolyte composition and production process to realize a more stable battery configuration.
As a result, it can improve electrolyte safety and lithium-ion transport efficiency, making it advantageous for high-energy-density lithium batteries and next-generation all-solid-state batteries.
Key Features:
This technology relates to a method for producing a sulfide-based solid electrolyte in a short time and with low energy consumption by using a solvothermal synthesis process.
Conventional production of sulfide-based solid electrolytes has suffered from long reaction times and high energy consumption, resulting in low productivity. This technology introduces a solvothermal reaction-based synthesis process to manufacture a high-purity electrolyte more efficiently.
As a result, it can reduce manufacturing time and energy usage while improving productivity, making it advantageous for the mass production of materials for all-solid-state batteries.
Key Features:
This technology is related to a method of manufacturing a cathode electrode including a carbon structure with a three-dimensional network structure.
The goal to solve is to provide a cathode electrode with improved electrical conductivity during charging and discharging. To this end, we propose a carbon precursor cathode with a three-dimensional network structure in which main fibers randomly cross each other.
The lithium secondary battery into which the cathode electrode according to this technology is inserted performs a long charge and discharge cycle. Meanwhile, it shows excellent characteristics of improved CE (coulombic efficiency) and stability due to the pores and chalcogen functional groups provided on the surface and inside of the main fiber of the cathode electrode.
This technology was developed through research support from the National Research Foundation of Korea to identify the formation mechanism and redox characteristics of highly functional pyropolymers rich in pi electrons.
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 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 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 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 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 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 is about the production of oxide/polymer hybrid solid electrolyte membranes using composite ceramic materials and all-solid-state lithium secondary batteries.
LLZO used in all-solid-state batteries has the problem of reacting with moisture and carbon dioxide at room temperature to generate Li2CO3 on the surface, resulting in Li loss and reduced ionic conductivity. To solve these problems, this technology proposes a hybrid electrolyte of a ceramic composite composition for secondary batteries using LALZO (Li6.28Al0.24La3Zr2O12) and h-BN (Hexagonal Boron Nitride) as active ingredients.
This technology significantly solves the problems of lithium loss, reduced ionic conductivity, and reduced interfacial stability, improving electrochemical properties, and lithium ions applied with existing organic liquid electrolytes. It is expected that it can replace batteries (LIBs).
This technology was developed through support from the National Research Foundation of Korea's research project on functional interface structures for lithium cathode-based high-capacity energy storage.
The present invention relates to a cathode active material for lithium ion secondary batteries, and to an iron-doped lithium excess oxide cathode active material and a manufacturing method.
Among secondary batteries, lithium-ion batteries (LIB) using an anode material with a layered structure have the highest energy density, so NCM batteries, which are ternary batteries of nickel (Ni), cobalt (Co), and manganese (Mn), are widely used. However, due to limited availability and high prices, research on Li2MnO3 (LMO), an overlithiated layered oxide (OLO) material, is being conducted. Although progress was being made, it had the disadvantage of low lifespan stability. To solve these problems, this technology proposes a method of doping iron to reduce costs and improve structural stability and rate characteristics.
The cathode active material of this technology does not use any expensive cobalt or nickel in Li2MnO3, but dopes it with cheap and eco-friendly iron. It is a groundbreaking technology to be used in the Iithum battery industry as it has cost reduction effects and excellent performance with capacity and long-term cycle stability as much as existing LiNiMnCoO2 (NCM) batteries.
This technology was developed through support from the National Research Foundation of Korea's research project on functional interface structures for high-capacity energy storage based on lithium cathodes.
