Sodium-ion battery negative electrode material, preparation method thereof and sodium-ion battery
A sodium-ion battery and negative electrode material technology, which is applied in electrode manufacturing, battery electrode, chemical electrode manufacturing, etc., can solve the problem of battery first-time coulombic efficiency reduction, achieve the effect of reducing specific surface area and improving first-time coulombic efficiency
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[0036] Based on the foregoing, the present invention discloses a negative electrode material for a sodium ion battery, a preparation method thereof, and a sodium ion battery, including:
[0037] S1. Dissolve glucose and graphene oxide in deionized water for hydrothermal reaction to obtain hydrothermal products; the experimental performance is that when graphene is not added, the glucose hydrothermal products are isolated carbon spheres; add After graphene oxide, the hydrothermal product exhibits a three-dimensional carbon sheet structure. During the hydrothermal reaction, the addition of graphene oxide changed the morphology of the product on the one hand, and on the other hand removed a part of N and O elements, thereby effectively reducing the specific surface area of the product.
[0038] In a specific implementation manner, the step S1 specifically includes:
[0039] S11, fully mixing glucose and graphene oxide with a concentration of 2 mg / mL, wherein the mass ratio of ...
Embodiment 1
[0060] Glucose was added to deionized water, and the hydrothermal reaction was carried out at 180°C for 8 hours to obtain the hydrothermal product; the hydrothermal product was centrifuged in a centrifuge with a centrifugal speed of 8000rpm for 5min, then washed, placed in Freeze-dry in a freeze-drying box for 48 hours to obtain a dried product, and finally heat the dried product to 1500° C. in an atmosphere of nitrogen with a purity of 99.99%, and keep it warm for 2 hours to obtain the sodium ion negative electrode material. The sodium ion negative electrode material field emission scanning electron microscope figure 1 shown.
Embodiment 2
[0062] Fully mix glucose with a mass ratio of 400:1 and graphene oxide (concentration: 2mg / mL), add the mixed material into deionized water, and perform a hydrothermal reaction at 180°C for 8h to obtain the hydrothermal product; The hydrothermal product is centrifuged in a centrifuge with a centrifugal speed of 8000rpm for 5 minutes, then washed, placed in a freeze-drying box and freeze-dried for 48 hours to obtain a dried product, and finally the dried product is purified at a purity of 99.99%. Heated to 800° C. under an atmosphere of nitrogen gas and kept for 2 hours to obtain the sodium ion negative electrode material. The field emission scanning electron microscope image of the sodium ion negative electrode material is as follows figure 2 shown.
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