Abstract:
The present invention relates to a negative electrode for a lithium secondary battery that can ensure a high energy density, a long-life characteristic, and stability by forming a film on a negative electrode for a lithium secondary battery and thus suppressing dendrites during electrodeposition, a method of manufacturing the same, and a lithium secondary battery using the same. The method of manufacturing the negative electrode for a lithium secondary battery according to the present invention includes preparing a sulfur dioxide-based sodium molten salt and forming a protective layer on the surface of a current collector by immersing the current collector in the sulfur dioxide-based sodium molten salt.
Abstract:
The present invention relates to an electrolyte solution containing an iodide additive, and a sulfur dioxide-based secondary battery including the same. An electrolyte solution for a sulfur dioxide-based secondary battery according to the present invention includes sulfur dioxide (SO2), an alkali metal salt, and an iodide additive. An iodide additive is added to an electrolyte solution, and thus energy efficiency, a long-life characteristic, and stability of a negative electrode of a sulfur dioxide-based secondary battery can be improved.
Abstract:
The present invention relates to a positive electrode containing a metal chloride and an alkali metal chloride and an alkali metal-ion secondary battery including the same. The alkali metal-ion secondary battery according to the present invention includes a negative electrode, a positive electrode containing a metal chloride and an alkali metal chloride, and a sulfur dioxide-based inorganic electrolyte solution containing an inorganic electrolyte including sulfur dioxide (SO2) and an alkali metal salt. As the alkali metal-ion secondary battery according to the present invention uses a mixture of the metal chloride and the alkali metal chloride as a positive electrode material, and an alkali-ion electrolyte as a sulfur dioxide-based inorganic electrolyte, compared to the conventional sodium-ion secondary battery, the alkali metal-ion secondary battery can be used at room temperature and pre-charged, and have improved energy density and power density.
Abstract:
The present invention relates to a cathode material for a nonaqueous lithium secondary battery using spherical cobalt hydroxide to inhibit the structural collapse of a final cathode material at a high voltage by preparing spherical cobalt hydroxide in which a dissimilar metal is uniformly substituted by using a precipitation reaction in a liquid phase, thereby improving lifetime characteristics even under high voltage charge/discharge conditions of 4.5 V. According to the present invention, it is possible to prepare spherical cobalt hydroxide having a particle size of 15-30 μm by precipitating a cobalt material, a hydroxyl group material, a dissimilar metal material for substitution and an amine-based material so as to have a composition represented by Co1-xMx(OH)2 (0.00≦x≦0.10, M=Al, Mg, Ti, and the like). Also, it is possible to prepare spherical cobalt oxide having a particle size of 10-25 μm by heat-treating the prepared cobalt hydroxide at 500-800° C.
Abstract:
The described technology relates to an electrolyte solution comprising a sulfur dioxide-based ionic liquid electrolyte, and a sodium-sulfur dioxide (Na—SO2) secondary battery having same, one purpose of the described technology being to enhance the storage characteristics of sulfur dioxide gas in an electrolyte solution. The sodium-sulfur dioxide secondary battery includes a negative electrode which is formed from an inorganic material and which contains sodium. The battery also includes a positive electrode which is formed from a carbon material and a sulfur dioxide-based inorganic electrolyte solution. Here, the electrolyte solution contains a sulfur dioxide-based ionic liquid electrolyte prepared by injecting SO2 gas in an ionic liquid.
Abstract:
The present invention relates to a non-aqueous cathode material for lithium secondary batteries using a spherical transition metal complex carbonate, and a method for preparing same. According to the present invention, since the surface of a spherical transition metal complex carbonate, which is prepared by using a cobalt material, nickel material, manganese material, carboxyl group material, and ammonia material, is coated with titanium dioxide. In addition, by mixing the prepared, surface-coated transition metal complex carbonate with a lithium material and heat-treating the resultant material, it is possible to prepare a spherical Li-rich cathode material having a primary particle size of 200 nm or more, and a 0.1C capacity of 250 mAh/g or more, and capable of implementing 96% or more of the initial capacity in a full cell after charging and discharging 60 times.