Electronics and Telecommunications Research Institute

Other

Korea Advanced Institute of Science and Technology

Kt&g Corporation

Young Gi Lee

Kwang Man Kim

Kwang Sun Ryu

Soon Ho Chang

Yong Joon Park

Jong Dae Kim

Min Gyu Choi

Nam Gyu Park

Young Sik Hong

Sang Hyo Lee

Xianglan Wu

Man Gu Kang

Kwang Chul Kim

Jung Ki Park

Yong Sik Hong

Ji Yong Eom

Hyo Seok Seo

Woong Hyun Na

Kyoung Hwan Oh

Eun Young Jeon

Jeong Heon Lee

Xiang Lan Wu

Provided are: a plant cell, in which expression or activity of a phytochelatin synthase (PCS) gene or a protein encoded by the PCS gene is reduced as compared with a parent cell; a plant having that has reduced heavy metal absorption, and includes the plant cell; a method of reducing heavy metals in a plant, the method including reducing expression or activity of a PCS gene or a protein encoded by the PCS gene, as compared with a parent cell; a CRISPR-Cas9 recombinant vector including a single guide RNA targeting a PCS gene; and a method of preparing a plant with reduced heavy metals, the method including transforming a plant cell with the recombinant vector.

Transgenic plant with reduced heavy metals and methods for preparation thereof

Provided is an insert for a tire, capable of being fastened together with a rim and a tire, the insert including a flow path connecting an upper surface and a lower surface of the insert.

Insert for tire

Provided is a tire structure capable of being combined with a rim, and the tire structure includes an air tube, a core provided on the air tube, and a tire outer layer provided on the core, and the core includes a body part positioned above a transverse diameter of the air tube and a wing part positioned under the transverse diameter of the air tube, and a lower end of the wing part is placed under an upper surface of the rim.

Tire structure and combining structure thereof

Provided are a vacuum-sealing-type flexible-film primary battery and a method of manufacturing the same. The primary battery includes a battery assembly comprising a positive electrode plate including a positive electrode collector having a first conductive carbon layer disposed directly on a surface-treated inner surface of a first pouch and a positive electrode layer disposed on the first conductive carbon layer of the positive electrode collector, a negative electrode plate including a negative electrode collector having a second conductive carbon layer disposed directly on a surface-treated inner surface of a second pouch and a negative electrode layer disposed on the second conductive carbon layer of the negative electrode collector, and an adhesion/post-injection polymer electrolyte layer interposed between the positive electrode plate and the negative electrode plate, wherein the battery assembly is completely sealed. The flexible-film primary battery may employ the pouch as a collector film to improve flexibility. Also, the flexible-film primary battery may be completely sealed using the pouch to improve a retention period and cell performance. Furthermore, the flexible-film primary battery may be manufactured using a screen printing technique, thereby facilitating a roll-to-roll sequential process.

Vacuum-sealing-type flexible-film primary battery

Provided are a composite polymer electrolyte for a lithium secondary battery in which a composite polymer matrix multi-layer structure composed of a plurality of polymer matrices with different pore sizes is impregnated with an electrolyte solution, and a method of manufacturing the same. Among the polymer matrices, a microporous polymer matrix with a smaller pore size contains a lithium cationic single-ion conducting inorganic filler, thereby enhancing ionic conductivity, the distribution uniformity of the impregnated electrolyte solution, and maintenance characteristics. The microporous polymer matrix containing the lithium cationic single-ion conducting inorganic filler is coated on a surface of a porous polymer matrix to form the composite polymer matrix multi-layer structure, which is then impregnated with the electrolyte solution, to manufacture the composite polymer electrolyte. The composite polymer electrolyte is used in a unit battery. The composite polymer matrix structure can increase mechanical properties. The introduction of the lithium cationic single-ion conducting inorganic filler can provide excellent ionic conductivity and high rate discharge characteristics.

Lithium cationic single-ion conducting filler-containing composite polymer electrolyte for lithium secondary battery and method of manufacturing the same

A method of manufacturing a flexible-film primary battery includes forming a first conductive carbon layer directly on a surface-treated inner surface of a first pouch film to form a positive electrode collector, and forming a positive electrode layer on the first conductive carbon layer to form a positive electrode plate. A second conductive carbon layer is formed directly on a surface-treated inner surface of a second pouch film to form a negative electrode collector, and a negative electrode layer is formed on the second conductive carbon layer to form a negative electrode plate. An adhesion/post-injection polymer electrolyte layer is inserted between the positive electrode plate and the negative electrode plate to manufacture a battery assembly. An electrolyte is injected into the polymer electrolyte layer of the battery assembly. The battery assembly is sealed completely to form a primary battery.

Method of manufacturing vacuum-sealing-type flexible-film primary battery

Provided is a method of producing a nanoparticle-filled phase inversion polymer electrolyte. The method includes mixing a nanoparticle inorganic filler and a polymer with a solvent to obtain a slurry; casting the obtained slurry to form a membrane; obtaining an inorganic nanoparticle-filled porous polymer membrane by developing internal pores in the cast membrane using a phase inversion method; and impregnating the inorganic nanoparticle-filled porous polymer membrane with an electrolytic solution. The polymer electrolyte produced using the method can be used in a small lithium secondary battery having a high capacity, thereby providing an excellent battery property.

Method of producing nanoparticle-filled phase inversion polymer electrolyte

There are provided an anode for a lithium metal polymer secondary battery comprising an anodic current collector having a surface on which a plurality of recesses having a predetermined shape are formed and a method of preparing the same. The plurality of recesses are formed on a surface of the anodic current collector using a physical method or a chemical method. In a lithium metal polymer secondary battery employing the anode, oxidation/reduction of lithium and the formation of dendrite occur only in the recesses formed by surface patterning of the anodic current collector. Thus, expanding and shrinking of a battery due to a change in the thickness of the lithium anode can be prevented and cycling stability and the lifespan of a battery can be improved.

Anode for lithium metal polymer secondary battery comprising surface patterned anodic current collector and method of preparing the same

Provided are a composite polymer electrolyte for a lithium secondary battery that includes a composite polymer matrix structure having a single ion conductor-containing polymer matrix to enhance ionic conductivity and a method of manufacturing the same. The composite polymer electrolyte includes a first polymer matrix made of a first porous polymer with a first pore size; a second polymer matrix made of a single ion conductor, an inorganic material, and a second porous polymer with a second pore size smaller than the first pore size. The second polymer matrix is coated on a surface of the first polymer matrix. The composite polymer matrix structure can increase mechanical properties. The single ion conductor-containing porous polymer matrix of a submicro-scale can enhance ionic conductivity and the charge/discharge cycle stability.

Single ion conductor-containing composite polymer electrolyte for lithium secondary battery and method of manufacturing the same

Provided is a lithium-cobalt-manganese oxide having the formula Li[CoLiMn]O(0.05&#x3c;X&#x3c;0.9) which provide a stable structure and a superior discharge capacity, and the method of synthesizing of the same. The method of synthesizing the oxides according to the present invention comprises: preparing an aqueous solution of lithium salt, cobalt salt, and manganese salt; forming a gel by burning the aqueous solution; making oxide powder by burning the gel; forming a fine oxide powder having a layered structure by the twice of treatments. The lithium-cobalt-manganese oxide synthesized according to the present invention has a stable and superior electrochemical characteristic. The oxide is synthesized by simple and low cost heat treatment process.

Li-Co-Mn oxide as cathode material for lithium batteries and method of synthesis of the same

A cathode active material for a lithium secondary cell used in a cellular phone is disclosed. The cathode active material for the lithium secondary cell and the method the same having a high capacity and a long lifetime, different from LiCoOand LiMnO, Li(Ni, Co)O, and V-system oxide that has been researched as the active material for substituting LiCoOare provided. The cathode active material for the lithium secondary cell in the next formula 1 is obtained by heating or chemically treating diadochite [Fe(PO)(SO)(OH).6HO] that is the mineral containing PO, SO, and OH.LiFeM(PO)(SO)(OH)&#x2003;&#x2003;(1) In the formula, M is at least one element selected from a radical consisting of Mg, Ti, Cr, Mn, Co, Ni, Cu, Zn, Al, and Si, with 0&#x2266;a, c&#x2266;0.5, 1&#x2266;b&#x2266;2, 0.5&#x2266;x, y, z&#x2266;1.5.

Cathode active material for lithium secondary cell and method for manufacturing the same

Disclosed is a polymer electrolyte membrane for a fuel cell, which restrains a crossover phenomenon of fuel and a decomposition of a polymer membrane over platinum, and shows outstanding power output and performance characteristics during operation of the fuel cell, and a method for producing the same. The method comprises the steps of blending a polymer matrix with a fluorinated ionomer of 3 to 50 wt % based on a weight of a polymer to produce a blended polymer solution; casting the blended polymer solution into a polymer membrane; and coating the fluorinated ionomer on both sides of the polymer membrane to produce a composite membrane. The polymer electrolyte membrane has advantages in that the fuel cell using the polymer electrolyte membrane, which has high energy efficiency, can be inexpensively produced, and so the fuel cell can be applied in various applications such as a power source of a nonpolluting car, on-site generation of electricity, an electric power source of a spacecraft, a portable energy source, and an energy source for military purpose.

Growing community of inventors

Daejeon, South Korea

Young Gi Lee