摘要:
Disclosed are a silicon nanostructured material with theoretical storage capacity of energy resulting from electrochemical reaction with lithium improved more than 10 times as compared to the existing graphite material and having superior output characteristics, an electrode including the same, and a secondary battery and an electrochemical capacitor including the electrode as a negative electrode. The physical stability of the electrode active material is improved and an electrode with high performance can be obtained. Since more energy can be stored as compared to the graphite material of the same thickness and high-output performance can be achieved through the nanostructure, energy density can be remarkably improved as compared to the existing lithium-ion battery by about 2 times. An asymmetric lithium-ion secondary battery including the electrode active material is applicable to storage of renewable energy, ubiquitous power source, power supply for machinery and vehicles, or the like.
摘要:
Disclosed is an electrode coated with a metal-doped carbon film.A metal-doped carbon film covers the interface of an electrode active material where it contacts an electrolyte. Such an artificial interface improves ion and electrical conductivity of the electrode interface and prevents pass of water or electrolyte during electrochemical reactions, thereby preventing undesired reactions.
摘要:
The present invention relates to a process of preparing zinc-tin composite transparent conductive oxide films ZnxSnyOz superior in light transmission, interfacial adhesion strength and electric conductivity by an organic chemical deposition method by using an electron cyclotron resonance (ECR).Zinc-tin oxide film composite ZnxSnyOz (x=1, y=8.7, Z=12) stably prepared by an electron-cyclotron chemical vapor deposition according to the present invention is superior to ZnSnO3 and Zn2SnO4 prepared by a physical deposition method in electric conductivity, thereby being applicable in a wide range of electric appliances including a heating element.
摘要:
The present invention relates to a method of preparing a porous silicon nanorod structure composed of columnar bundles having a diameter of 50-100 nm and a length of 2-5 μm, and a lithium secondary cell using the porous silicon nanorod structure as an anode active material. The present invention provides a high-capacity and high-efficiency anode active material for lithium secondary cells, which can overcome the low conductivity of silicon and improve the electrode deterioration attributable to volume expansion because it is prepared by electrodepositing the surface of silicon powder with metal and simultaneously etching the silicon powder partially using hydrofluoric acid.
摘要:
Disclosed are a carbon nanotube-coated silicon/metal composite particle, a preparation method thereof, an anode for a secondary battery comprising the carbon nanotube-coated silicon/metal composite particle, and a secondary battery comprising the anode, wherein the carbon nanotube-coated silicon/metal composite particle characterized in comprising: a composite particle of silicon and metal; and a carbon nanotube coated on the surface of the composite particle of silicon and metal, wherein the carbon nanotube-coated silicon/metal composite particle may be prepared by preparing composite particle of silicon and metal, followed by treating the composite particles of silicon and metal with heat under a mixed gas atmosphere of an inert gas and a hydrocarbon gas.