Inorganic si-zno-li composite material, preparation method and application in lithium metal batteries
A technology of lithium metal batteries and composite materials, which is applied in the field of energy storage system device materials, can solve problems such as the inability to overcome the infinite volume change of lithium metal negative electrodes, and achieve good lithium affinity and mechanical strength, good electrochemical performance, and reaction conditions easy effect
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Embodiment 1
[0034] A preparation method of an inorganic Si-ZnO-Li composite material applied to a negative electrode of a lithium metal battery, the specific steps of the method are as follows:
[0035] (1) Preparation of Si-ZnO-Li molten mixture: silicon powder and zinc oxide nanoparticles were mixed with lithium flakes in a mass ratio of 1:1:2, placed in a crucible, heated to 300 °C, and stirred for 30 min to obtain a molten mixture ;
[0036] (2) Si-ZnO-Li composite material: the Si-ZnO-Li molten mixture obtained in step (1) is cooled to room temperature, and then mechanically pressed into a composite material with uniform thickness.
[0037] Due to the insufficient amount of Li metal, the composite material prepared in this example could not be pressed into an electrode sheet. The digital photo after cooling is shown in figure 1 (a).
Embodiment 2
[0039] A preparation method of an inorganic Si-ZnO-Li composite material applied to a negative electrode of a lithium metal battery, the specific steps of the method are as follows:
[0040](1) Preparation of Si-ZnO-Li molten mixture: silicon powder and zinc oxide nanoparticles were mixed with lithium flakes in a mass ratio of 1.5:1.5:6, placed in a crucible, heated to 300 °C, and stirred for 30 min to obtain a molten mixture ;
[0041] (2) Si-ZnO-Li composite material: Cool the Si-ZnO-Li molten mixture obtained in step (1) to room temperature, and then mechanically press it into a composite material with a thickness of 50-500 μm, denoted as Li1S1Z.
Embodiment 3
[0043] A preparation method of an inorganic Si-ZnO-Li composite material applied to a negative electrode of a lithium metal battery, the specific steps of the method are as follows:
[0044] (1) Preparation of Si-ZnO-Li molten mixture: silicon powder and zinc oxide nanoparticles were mixed with lithium flakes in a mass ratio of 1:2:6, placed in a crucible, heated to 300 °C, and stirred for 30 min to obtain a molten mixture ;
[0045] (2) Si-ZnO-Li composite material: Cool the Si-ZnO-Li molten mixture obtained in step (1) to room temperature, and then mechanically press it into a composite material with a uniform thickness, denoted as Li1S2Z.
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