5 results about "Cobalt salt" patented technology

The invention discloses a lithium air battery catalyst based on metal organic frameworks (MOFs), and a method for preparing the lithium air battery catalyst. The catalyst consists of a transition metal complex and MOFs carriers, wherein the transition metal complex is obtained by reacting cobalt salt or manganese salt with a nitrogen-containing ligand. After being applied to a lithium air battery, the catalyst is high in catalytic activity and high in stability. By using the low-cost nitrogen-containing ligand as a raw material, the catalyst has the advantages of simple preparation process, low preparation cost and the like.

The invention provides a preparation method of a radial structure spherical NCM811 type ternary positive electrode material. The preparation method comprises the following steps: preparing a nickel salt, cobalt salt and manganese salt solution used as a solution 1, wherein a molar ratio of Ni:Co:Mn is 8:1:1; taking a precipitant, and preparing a solution 2; taking a complexing agent, and preparinga solution 3; adding the complexing agent solution into a reaction kettle as a base solution; adding the solution 1, the solution 2, and the solution 3 into the reaction kettle, introducing an inertgas to carry out protection, controlling the total ammonia concentration of the reaction system to be 0.5-1.5 mol/L, and performing aging under a pH value of 11.3-11.7 at a temperature of 45-55 DEG Cfor 5-15 h; washing the obtained reaction product, performing suction filtration, and drying the reaction product to prepare a precursor; grinding and uniformly mixing the precursor and a lithium saltwhich are used as raw materials; placing and sintering the obtained mixture in a muffle furnace in an oxygen atmosphere, wherein the sintering process comprises sintering at 400-500 DEG C for 4-8 h,and sintering at 700-780 DEG C for 10-15 h; and cooling the sintered mixture to room temperature to prepare the positive electrode material. The material obtained by the invention has the advantages of stable structure, excellent electrochemical performances, and reduction of the industrialization cost.