Abstract:
PURPOSE: A negative electrode for lithium ion secondary battery, a manufacturing method thereof and a lithium-ion secondary battery adopting the same are provided to simplify manufacturing process and to improve charging and discharging properties. CONSTITUTION: A manufacturing method of lithium ion secondary battery having an amorphous silicon oxide thin film includes a step of forming a SiOx thin film. Here, 0.3
Abstract:
The present invention relates to a negative active material including a silicon oxide based particle and a carbon coating layer formed on the surface of the silicon oxide based particle; a manufacturing method thereof using a one-step, and a secondary battery using the negative electrode active material.
Abstract:
The present invention relates to a cathode active material comprising silicon nanoparticles and a siloxane layer formed on the surface of the silicon nanoparticles, to a method for manufacturing the same, and a secondary battery using the cathode active material. The cathode active material according to the present invention has the siloxane layer on the surface of the silicon nanoparticles, to prevent the capacity drop of the battery to improve the charge and discharge properties and lifetime properties of the battery, moreover, to have an excellent dispersibility to be uniformly dispersed during manufacturing a cathode to improve the workability.
Abstract:
The present invention provides a method of manufacturing silicon nanopowders for an anode material of a lithium secondary battery comprising: a step of providing lithium powers and silica powders (SiO2); a step of forming silicon (Si) nanopowders by performing oxygen single displacement for delivering the oxygen of silica to the lithium powders while the lithium powers and silica powders pass through a ball mill; and a step of separating and purifying the silicon nanopowders from lithium oxides, and the silicon nanopowders manufactured thereby. The silicon nanopowders manufactured according to the present invention are economical by using low-priced silica and controls physico-chemical properties such as particle size, surface area, pore degree, nanostructure etc, thereby being suitable for materials used in an anode for a secondary battery