Abstract:
PURPOSE: A positive electrode active material for a lithium secondary battery is provided to minimize the side reaction of a positive electrode active material and electrolyte and to suppress the elution of manganese and degradation at charging and discharging. CONSTITUTION: A positive electrode active material for a lithium secondary battery includes a lithium metal composite oxide core represented by chemical formula 1, Li_wNi_xCo_yMn_(1-x-y-z)M_zO_2; and a coating layer containing fluorine compounds on the lithium metal composite oxide core. In chemical formula 1, 1.2
Abstract:
PURPOSE: A positive electrode material is provided to reduce the diffusion distance of lithium or sodium ion, to have electrochemical activity which can be used as a positive electrode, and to make ion intercalation and deintercalation of lithium or sodium ion. CONSTITUTION: A positive electrode material has a particle size of 1-100 nm and a voltage flat plane of 3.7-4.0 V by discharging, is coated with carbon to increase conductivity, and comprises a compound indicated in chemical formula A_xMnPO_4F, where A is Li or Na or a mixture thereof, and 0
Abstract:
PURPOSE: Spherical molybdenum dioxide is provided to ensure high discharge capacity, excellent cycleability, and low explosion danger, and to improve a rechargeable property, output characteristic and lifetime property. CONSTITUTION: A method for preparing molybdenum dioxide for a secondary battery comprises the steps of: supplying a mixed solution in which carbon source is added to an organic acid salt solution including molybdenum, to a sonicator(30); producing micro droplets from the mixed solution through the sonicator; transporting the micro droplets to a furnace(40) using carrier gas in an inert or reducing atmosphere; and heat treating the micro droplets.