Carbon cloth-based potassium metal composite electrode as well as preparation method and application thereof
A metal composite and carbon cloth-based technology, applied in the field of electrochemistry, can solve the problems of poor rate performance and cycle stability of negative electrode materials, and achieve excellent rate and cycle stability, excellent electrochemical performance, and simple raw materials.
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[0037] In order to solve the above problems, combined with figure 1 As shown, the embodiment of the present invention provides a method for preparing a carbon cloth-based potassium metal composite electrode, comprising the following steps:
[0038] A preparation method of a carbon cloth-based potassium metal composite electrode, comprising the steps of:
[0039] S1. Dissolving anhydrous stannous chloride in N,N-dimethylformamide solution, stirring evenly, adding terephthalic acid and polyvinylpyrrolidone in turn to obtain a mixed solution;
[0040] S2. Arrange the carbon into the mixed liquid, let it stand for reaction under preset conditions, and then take out the carbon cloth, wash and dry it to obtain the precursor;
[0041] S3. Calcining the precursor in a muffle furnace to obtain the carbon cloth-based potassium-philic framework material CC@SnO 2 ;
[0042] S4. Immerse the carbon cloth-based potassium-friendly framework material into the metal potassium melt to obtain ...
Embodiment 1
[0059] This embodiment provides a method for preparing a carbon cloth-based potassium metal composite electrode, comprising the following steps:
[0060] 1) Dissolve 0.12g of anhydrous stannous chloride in 70ml of N,N-dimethylformamide solution, fully stir until completely dissolved, add 0.12g of terephthalic acid, fully stir until clear, then add 0.1g of poly Vinylpyrrolidone (K30), stirred until completely dissolved;
[0061] 2) Add 5cm*5cm commercial carbon cloth to the mixture obtained in step 1), transfer the solution to a 100ml reaction kettle, put it in an oven at 180°C for 12 hours, take out the carbon cloth, rinse it with absolute ethanol three times, and then dry it. get the precursor;
[0062] 3) Calcining the precursor in a muffle furnace at 450°C for 3 hours to obtain 2 Modified carbon cloth-based potassium-philic framework material CC@SnO 2 ;
[0063] 4) After heating and melting the potassium block in the glove box, the CC@SnO 2 Immersion in molten potassiu...
Embodiment 2
[0075] This embodiment provides a method for preparing a carbon cloth-based potassium metal composite electrode, the difference from Embodiment 1 is:
[0076] In step 1), 0.12g of anhydrous stannous chloride was dissolved in 35ml of N,N-dimethylformamide solution, fully stirred until completely dissolved;
[0077] All the other steps and parameters are the same as in Example 1.
[0078] The K-CC@SnO prepared in Example 2 2 The composite electrode is used as the negative electrode material of the potassium ion battery, and is assembled into a full battery according to the method described above, and the electrochemical performance test is carried out. When the current density is 50mA / g, the capacity is still 125mAh / g, and when the current density is 100mA / g, the capacity can reach 88mAh / g after 1000 cycles.
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