Abstract:
본 발명은 ZnO 및 MnO가 화학적으로 결합된 복합체, 이를 포함하는 리튬 이차전지용 음극 활물질 및 이의 제조방법에 관한 것이다. 본 발명에 따르면, 전기적 특성이 우수한 리튬 이차전지용 음극의 제공을 가능케 하는 ZnO-MnO 복합체 및 이를 포함하는 음극 활물질이 제공되며, 상기 음극 활물질을 보다 단순화된 공정으로 제조할 수 있는 방법이 제공된다.
Abstract:
PURPOSE: A negative electrode active material is provided to provide a negative electrode for lithium secondary batteries with excellent electric performance and to be simply manufactured. CONSTITUTION: A negative electrode active material comprises a composite particle which is chemically coupled with ZnO and MnO. The composite particle has an average particle diameter of 100 nm or less. A manufacturing method of a negative electrode active material comprises a step of molding a composite particle which is chemically coupled with ZnO and MnO by treating ZnMn2O4 powder in an inert or reduction atmosphere. The heat treatment is conducted at 600-900 °C for 4-10 hours. The ZnMn2O4 powder is prepared by a solvothermal synthesis method or a co-precipitation method. [Reference numerals] (AA) ZnMn2O4 powder; (BB) ZnO-MnO complex; (CC) Thermal treatment under inactive or reduction atmosphere(at 600-900°C for 4-10 hours)
Abstract:
본 발명은 리튬-공기 전지용 탄소계 양극에 관한 것으로서, 보다 상세하게는 연속상의 다공성 집전체(current collector), 및 표면적이 500 내지 2000 ㎡/g이고 공극량이 0.5 내지 5 ㎤/g인 탄소 분말과 바인더 수지를 포함하며, 상기 집전체의 공극 내에 포함되는 조성물을 포함하는 리튬-공기 전지용 탄소계 양극; 상기 탄소 전극의 제조 방법; 및 상기 탄소계 양극을 포함하는 리튬-공기 전지에 관한 것이다. 본 발명에 따른 탄소계 양극은 리튬의 산화반응이 원활하게 일어날 수 있는 최적의 공극을 제공함에 따라, 이를 포함하는 리튬-공기 전지는 방전 성능이 안정적이며, 에너지 밀도가 높고, 이론 방전 용량에 가까운 성능을 발현할 수 있는 장점이 있다.
Abstract:
The present invention relates to a method for manufacturing an air electrode for a lithium-air battery having a high capacity and excellent cycle characteristics, and a lithium-air battery using the same. More particularly, the present invention can improve homogeneity on the surface of an electrode due to active materials uniformly dispersed not only on the surface of a current collector but also on a frame inside, by coating electrode active material slurry including carbon or carbon, a catalyst and a binder on the current collector of an air electrode via a spray coating method. Therefore, the present invention improves the characteristics of a lithium-air battery and provides an air electrode having the characteristics of a secondary battery and a lithium-air battery including the same, as a cathode. [Reference numerals] (AA) Comparative example 2; (BB) Comparative example 1; (CC) Example 1
Abstract:
A biodegradable polymer material for fixing bone and a method for manufacturing the same are provided to improve crystallizing degree and orientating property of PLCL copolymer, to minimize molecular weight loss by thermal decomposition of polymer, and to allow flexibility and high strength. A method for manufacturing a biodegradable polymer material for fixing bone including the steps of: manufacturing PLCL copolymer with an average molecular weight more than 100,000 Da by polymerizing PLLA AND PCL; cooling the manufactured PLCL copolymer after vacuum compression shaping; pressing out the above product; and performing thermal fixation of the above product.
Abstract:
PURPOSE: A carbon-based positive electrode for lithium-air battery is provided to provide a lithium secondary battery with stable charging performance, high energy density and charging capacity near theoretical discharge capacity by comprising optimized pores in which oxidation of lithium is activated. CONSTITUTION: A carbon-based positive electrode for lithium-air battery comprises a current collector of continuous phase, a composition comprised in pores of the current collector, comprising carbon powder and binder resin with a surface area is 500-2000 m^2/g and a pore amount of 0.5-5 cm^3/g. the composition comprises 100-450 parts by weight of carbon powder based on 100 parts by weight of the binder resin. The binder resin is one or more selected from polyvinylidene fluoride, polytetrafluoroethylene, and polytrifluorostyrenesulfonic acid.
Abstract:
The present invention relates to a complex metal oxide catalyst for lithium-air secondary batteries which can inhibit overvoltage which occurs during the charge/discharge of the lithium-air secondary batteries and oxidative decomposition of an electrolyte generated at both poles during charging, and a manufacturing method thereof. The complex metal oxide catalyst for lithium-air secondary batteries according to an embodiment of the present invention is represented by chemical formula 1. In the formula, A is lead (Pb) or bismuth (Bi), x is 0 or 1 and δ is 0 or 1.
Abstract:
본 발명은 리튬이차전지용 음극 활물질 및 이의 제조방법에 관한 것으로서, 보다 상세하게는 ZnMn 2 O 4 분말을 열처리하여 형성되는 ZnO-MnO 복합체 입자를 포함하는 음극 활물질 및 이의 제조방법에 관한 것이다. 본 발명에 따르면, 전기적 특성이 우수한 리튬이차전지용 음극의 제공을 가능케 하는 음극 활물질이 제공되며, 상기 음극 활물질을 보다 단순화된 공정으로 제조할 수 있는 방법이 제공된다.