Self-supporting spinning sulfur positive electrode host material uniformly loaded with small-size catalyst as well as preparation method and application of self-supporting spinning sulfur positive electrode host material
A host material and uniform loading technology, applied in battery electrodes, structural parts, electrical components, etc., can solve problems such as high cost of use and complex process, and achieve the goals of alleviating the shuttle effect, high-efficiency catalytic performance, excellent capacity performance and Coulombic efficiency Effect
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Embodiment 1
[0055] In this example, the self-supporting spinning sulfur cathode host material uniformly loaded with small-sized catalysts includes self-supporting spinning carbon nanofibers (CNF) and nickel-loaded nitrogen-doped carbon quantum fibers uniformly distributed in the self-supporting spinning carbon nanofibers dots (Ni@NCDs), in the nickel-supported nitrogen-doped carbon quantum dots, Ni-N bonds exist between nickel and nitrogen-doped carbon quantum dots (NCDs).
[0056] The preparation method of the self-supporting spinning sulfur cathode host material uniformly loaded with small-sized catalysts in this embodiment comprises the following steps:
[0057] (1) Preparation of nitrogen-doped carbon quantum dots (NCDs)
[0058] Nitrogen-doped carbon quantum dots were prepared by a bottom-up hydrothermal method: First, weigh 4.8 g of anhydrous citric acid, dissolve it completely in 50 ml of deionized water, and then pipette 1.675 mL of ethylenediamine into the Water citric acid solu...
Embodiment 2
[0065] In this example, the self-supporting spinning sulfur cathode host material uniformly loaded with small-sized catalysts was prepared by a method comprising the following steps:
[0066] (1) Preparation of nitrogen-doped carbon quantum dots (NCDs)
[0067] Nitrogen-doped carbon quantum dots were prepared by a bottom-up hydrothermal method: First, weigh 3.0 g of anhydrous citric acid, dissolve it completely in 50 ml of deionized water, and then pipette 1.675 mL of ethylenediamine into the Water citric acid solution, after stirring evenly, transfer the mixed solution to a 100mL polytetrafluoroethylene-lined reactor, heat it in water at 180°C for 8 hours, cool the reacted solution to room temperature naturally, concentrate it with a vacuum rotary evaporator, and place Freeze in the refrigerator for 12 hours, and then freeze-dry to obtain a dark reddish-brown powder sample, which is nitrogen-doped carbon quantum dots (NCDs).
[0068] (2) Preparation of nickel-supported nitro...
Embodiment 3
[0074] In this example, the self-supporting spinning sulfur cathode host material uniformly loaded with small-sized catalysts was prepared by a method comprising the following steps:
[0075] (1) Preparation of nitrogen-doped carbon quantum dots (NCDs)
[0076] Nitrogen-doped carbon quantum dots were prepared by a bottom-up hydrothermal method: first, weigh 6.0 g of anhydrous citric acid, dissolve it completely in 50 ml of deionized water, and then pipette 1.675 mL of ethylenediamine into the Water citric acid solution, after stirring evenly, transfer the mixed solution to a 100mL polytetrafluoroethylene-lined reaction kettle, heat it in water at 220°C for 3h, cool the reacted solution to room temperature naturally, concentrate it with a vacuum rotary evaporator, and place Freeze in the refrigerator for 12 hours, and then freeze-dry to obtain a dark reddish-brown powder sample, which is nitrogen-doped carbon quantum dots (NCDs).
[0077] (2) Preparation of nickel-supported ni...
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