Preparation method of molybdenum-doped nickel cobaltate porous egg yolk-shell structure material
A technology of nickel cobalt oxide and shell structure, which is applied in the direction of structural parts, active material electrodes, electrical components, etc., can solve the problems of nickel cobalt oxide electrochemical performance needs to be improved, difficult to form defect sites, cumbersome and complex synthesis process, etc., to achieve Improved electrochemical performance, reduced energy consumption, and strong operability
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[0058] The third embodiment of the present invention provides an application of the molybdenum-doped nickel cobaltate porous yolk-shell structure material as a negative electrode material for a lithium-ion battery and / or in the preparation of a lithium-ion battery.
[0059] The present invention adopts the molybdenum-doped nickel cobaltate porous yolk-shell structure material as the negative electrode of lithium-ion batteries and / or to prepare lithium-ion batteries, and has more excellent electrochemical performance.
[0060] The fourth embodiment of the present invention provides a lithium-ion battery negative electrode, including a current collector, a binder, and an active component, and the active component is the above-mentioned molybdenum-doped nickel cobaltate porous egg yolk-shell structure material.
[0061] A fifth embodiment of the present invention provides a lithium-ion battery, including a lithium-ion positive electrode, an electrolyte, and the above-mentioned neg...
Embodiment 1
[0065] Place a 100mL beaker on a magnetic stirrer, add 30mL of N,N-dimethylformamide and 15mL of glycerol, and add 0.055g of Ni(NO 3 ) 3 ·6H 2 O, 0.110g Co(NO 3 ) 2 ·6H 2 O, 0.050gH 24 Mo 7 N 6 o 24 4H 2 O, after the solution was stirred for 30 minutes, 0.199 g of terephthalic acid was added, and the stirring was continued for 1.5 hours until it was completely dissolved, forming a pink solution. The obtained pink solution was transferred to a 100 mL reaction kettle, and solvothermally reacted at 180° C. for 6 h. After cooling, the purple solution was centrifuged and washed. The washed precipitate was dried at 70 °C for 12 h, and the dried precipitate was ground and calcined at 350 °C for 1 h to obtain Mo-doped NiCo 2 o 4 Material.
[0066] The Mo-doped NiCo obtained in this example 2 o 4 The shape of the material is as figure 1 shown, to show that the prepared Mo-doped NiCo 2 o 4 The material is a porous spherical structure.
Embodiment 2
[0068] Place a 100mL beaker on a magnetic stirrer, add 30mL of N,N-dimethylformamide and 15mL of glycerol, and add 0.055g of Ni(NO 3 ) 3 ·6H 2 O, 0.110g Co(NO 3 ) 2 ·6H 2 O, 0.050gH 24 Mo 7 N 6 o 24 4H 2 O, after the solution was stirred for 30 min, 0.199 g of terephthalic acid was added, and the stirring was continued for 1.5 h until it was completely dissolved, forming a pink solution. The obtained pink solution was transferred to a 100 mL reaction kettle, and solvothermally reacted at 180° C. for 6 h. After cooling, the purple solution was centrifuged and washed. The washed precipitate was dried at 70 °C for 12 h, and the dried precipitate was ground and calcined at 500 °C for 1 h to obtain Mo-doped NiCo 2 o 4 Material.
[0069] The Mo-doped NiCo obtained in this example 2 o 4 The shape of the material is as Figure 2~3 , indicating that the prepared Mo-doped NiCo 2 o 4 The material is a porous egg yolk-shell structure, the diameter of the yolk-shell struc...
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