Preparation method and application of MOF modified zinc negative electrode material
A technology of zinc anode and MOF, which is applied in the field of preparation of MOF-modified zinc anode materials, can solve the problems of battery puncture, short circuit, and shortened battery life, and achieve the effects of controllable structure, simple preparation process, and adjustable morphology
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Embodiment 1
[0026] (1) Sand the 0.08mm thick zinc foil repeatedly with 200-grit sandpaper until it is smooth, and rinse it with deionized water and ethanol until it is clean;
[0027] (2) At room temperature, add 16.42 g of dimethylimidazole to 40 mL of methanol, mix evenly under magnetic stirring for 1 min, add the above zinc foil and react at 25 °C for 16 h, after the reaction, rinse with methanol for 3 times ; The resulting product was dried at 60 °C for 5 h to prepare a ZIF-8 / Zn material, a MOF-modified zinc anode material; the SEM images of the ZIF-8 / Zn material at different magnifications are shown in figure 1 Shown; The XRD spectrum of this ZIF-8 / Zn material is as figure 2 shown;
[0028] Select the sample in this embodiment to characterize and analyze, and the results are as follows: image 3 with Figure 4 As shown, the test results are as follows: ZIF-8 / Zn materials were assembled into symmetrical batteries, and the prepared symmetrical batteries had excellent cycle stabilit...
Embodiment 2
[0032] (1) Sand the 0.05mm thick zinc foil repeatedly with 200-grit sandpaper until it is smooth, and rinse it with deionized water and ethanol until it is clean;
[0033] (2) At room temperature, add 0.3284 g of dimethylimidazole to 40 mL of methanol, mix well under magnetic stirring for 1 min, add the above-mentioned zinc foil and react at 20 °C for 3 h, after the reaction is completed, rinse with methanol for 3 times; The obtained product was dried at 55 °C for 4 hours to prepare ZIF-8 / Zn material, MOF modified zinc anode material;
[0034] The samples in this example were selected for characterization and analysis, and the test results are as follows: ZIF-8 / Zn materials were assembled into symmetrical batteries, and the prepared symmetrical batteries had excellent cycle stability. The current density is 1 mA cm -2 、1 mAh cm -2 Under the test conditions, the cycle time is 200 h.
Embodiment 3
[0036] (1) Grind the 0.1mm thick zinc foil repeatedly with 200-grit sandpaper until it is smooth, and rinse it with deionized water and ethanol until it is clean;
[0037] (2) At room temperature, add 328.4 g of dimethylimidazole to 40 mL of methanol, mix evenly under magnetic stirring for 1 min, add the above-mentioned zinc foil and react at 60 °C for 30 h, after the reaction, rinse with methanol for 3 times; The obtained product was dried at 65 °C for 6 hours to obtain a ZIF-8 / Zn material, which is a MOF-modified zinc anode material;
[0038] The samples in this example were selected for characterization and analysis, and the test results are as follows: ZIF-8 / Zn materials were assembled into symmetrical batteries, and the prepared symmetrical batteries had excellent cycle stability. The current density is 1 mA cm -2 、1 mAh cm -2 Under the test conditions, the cycle time is 300 h.
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