摘要:
A method for synthesizing lithium titanium oxide-based anode active material nanoparticles, and more particularly, a method for synthesizing lithium titanium oxide-based anode active material nanoparticles using a supercritical fluid condition is disclosed herein. The method may include (a) preparing a lithium precursor solution and a titanium precursor solution, (b) forming lithium titanium oxide-based anode active material nanoparticles by introducing the lithium precursor solution and titanium precursor solution into an reactor at a supercritical fluid condition, and (c) cleaning and drying the nanoparticles, and may further include (d) calcinating the nanoparticles at 500-1000° C. for 10 minutes to 24 hours after the step (c).
摘要:
Disclosed is a method of preparing a positive active material for a lithium battery. The method comprises: depositing a positive active material on an electrode on a substrate (1); and putting metal chips on a metal oxides target and performing a sputtering process, thereby depositing mixed metal-oxides on the positive active material (2). In another aspect, the method comprises: preparing an electrode active material; preparing a precursor solution including the electrode active material; and printing the precursor solution on the substrate, and evaporating a solvent at a temperature of 80-120° C.
摘要:
Disclosed is a method for preparing a cathode active material represented by Li2MSiO4 (M=transition metal) for a lithium secondary battery using microwaves, including: 1) dispersing a silicon compound in a solvent; 2) mixing a lithium salt and a transition metal salt in the resulting dispersion and then adding a chelating agent to form complex ions: and 3) treating the mixture with microwaves for gelation. The prepared cathode active material represented by Li2MSiO4 (M=transition metal) for a lithium secondary battery has homogeneous composition and superior characteristics. Further, since the preparation process is simple, the production efficiency is good.
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.
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.