Abstract: The present invention relates to a single-phase lithium-deficient lithium multicomponent transition metal oxide having a layered crystal structure represented by the formula Li1-aM11-x-y-zM2xM3yM4zO2, wherein M1 is one or more transition metals having an oxidation number of +3; M2 is one or more transition metals having an oxidation number of +4; M3 is one or more transition metals having an oxidation number of +5; M4 is one or more elements having an oxidation number of +2; x+2y?z>0; x+y+z<1; 0<a<1; 0<x<0.75; 0?y<0.6; and 0?z<0.3.

Abstract: The invention provides an anion-deficient lithium transition-metal phosphate as an electrode-active material, which is represented by the chemical formula Li1?xM(PO4)1?y (0?x?0.15, 0?y?0.05). The invention provides a method for preparing said Li1?xM(PO4)1?y, which comprises preparing a precursor of lithium transition-metal phosphate; mixing said precursor with water under reaction conditions of 200˜700 and 180˜550 bar to produce an anion-deficient lithium transition-metal phosphate; and calcining, or granulating and calcining the resultant compound. The invention also provides electrochemical devices employing said Li1?xM(PO4)1?y as an electrode-active material.

Abstract: The invention provides an anion-deficient non-stoichiometric lithium iron phosphate as an electrode-active material, which is represented by the formula Li1?xFe(PO4)1?y, wherein 0<x?0.15 and 0<y?0.05. The invention provides a method for preparing said Li1?xFe(PO4)1?y, which comprises preparing a precursor of lithium iron phosphate; mixing said precursor with water under reaction conditions of 200˜700° C. and 180˜550 bar to produce lithium iron phosphate; and calcining, or granulating and calcining the resultant compound. The invention also provides electrochemical devices employing said Li1?xFe(PO4)1?y as an electrode-active material.

Abstract: The invention provides an anion-deficient non-stoichiometric lithium iron phosphate as an electrode-active material, which is represented by the formula Li1?xFe(PO4)1?y, wherein 0<x?0.15 and 0<y?0.05. The invention provides a method for preparing said Li1?xFe(PO4)1?y, which comprises preparing a precursor of lithium iron phosphate; mixing said precursor with water under reaction conditions of 200˜700° C. and 180˜550 bar to produce lithium iron phosphate; and calcining, or granulating and calcining the resultant compound. The invention also provides electrochemical devices employing said Li1?xFe(PO4)1?y, as an electrode-active material.

Abstract: A blended solution is made by melting LiOH.H2O into distilled water, and then, Co metallic powders are added into the blended solution to make a reactive solution. The reactive solution is charged into an autoclave, and held at a predetermined temperature. Then, a pair of platinum electrodes are set into the reactive solution, and a given voltage is applied between the pair of platinum electrode. As a result, a compound thin film, made of crystal LiCoO2 including Li element of the blended solution and Co element of the Co metallic powders, is synthesized on the platinum electrode constituting the anode electrode.

Abstract: A first reactive solution is made of a water solution composed of LiOH.7H2O melted in distilled water, and a second reactive solution is made of a water solution composed of CoSO4.7H2O melted in distilled water. Then, the first and the second reactive solutions are put in a flow-type reactor with a pair of electrodes and a porous base material provided in between the pair of electrodes therein. The first reactive solution is flown in between one electrode and the porous base material at its given flow rate, and the second reactive solution is flown in between the other electrode and the porous base material at its given flow rate. Then, a given voltage is applied between the pair of electrodes to synthesize a compound thin film including the components of the first and the second reactive solutions directly on the porous base material.

Abstract: A blended solution is made by melting LiOH•H2O into distilled water, and then, Co metallic powders are added into the blended solution to make a reactive solution. The reactive solution is charged into an autoclave, and held at a predetermined temperature. Then, a pair of platinum electrodes are set into the reactive solution, and a given voltage is applied between the pair of platinum electrode. As a result, a compound thin film, made of crystal LiCoO2 including Li element of the blended solution and Co element of the Co metallic powders, is synthesized on the platinum electrode constituting the anode electrode.

Abstract: A first reactive solution is made of a water solution composed of LiOH.7H2O melted in distilled water, and a second reactive solution is made of a water solution composed of CoSO4.7H2O melted in distilled water. Then, the first and the second reactive solutions are put in a flow-type reactor with a pair of electrodes and a porous base material provided in between the pair of electrodes therein. The first reactive solution is flown in between one electrode and the porous base material at its given flow rate, and the second reactive solution is flown in between the other electrode and the porous base material at its given flow rate. Then, a given voltage is applied between the pair of electrodes to synthesize a compound thin film including the components of the first and the second reactive solutions directly on the porous base material.

Abstract: In the formation of a double oxide film of Li element and a metal element other than Li element, a metal body of the metal element selected from the group consisting of Ni, Co, V, Fe, Cr and Al is immersed in an alkaline solution containing Li ion to conduct a hydrothermal reaction between the metal body and Li ion, whereby a double oxide film is formed on the surface of the metal body.