Multistage ordered macroporous/mesoporous carbon-metal carbide composite material as well as preparation method and application thereof
A technology of metal carbides and composite materials, applied in the direction of active material electrodes, electrochemical generators, structural parts, etc., can solve the problems of uneven deposition of lithium metal, insufficient space for volume expansion of lithium metal, and poor lithium affinity. Achieve the effects of ensuring uniform deposition, improving affinity, and strong universality
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Embodiment 1
[0060] Add 1.5g of F127, 0.1g of resole phenolic resin, and 3.0g of 0.1M titanium citrate aqueous solution to 16mL of ethanol solution in sequence. After stirring at room temperature for 30 min, a clear and transparent solution was obtained, and the obtained solution was transferred to a weighing bottle containing polystyrene microsphere photonic crystals. It was evaporated and dried at 80°C for 24 hours to obtain a pale yellow solid. The light yellow solid was placed in a tube furnace under a nitrogen atmosphere and calcined at 1000°C for 2h to obtain a multi-level ordered macroporous / mesoporous carbon-titanium carbide composite. The heating rate during the roasting process was set at 5 °C min -1 .
[0061] See figure 1 , in this embodiment, the surfactant Pluronic F127 (EO106-PO70-EO106) and polystyrene microsphere photonic crystal are used as soft template and hard template respectively, titanium citrate is used as titanium source, and resole phenolic resin is used as ca...
Embodiment 2
[0069] Add 1.5g F127, 0.1g resole phenolic resin, and 0.02g molybdenum acetylacetonate to 16mL ethanol solution in sequence. After stirring at room temperature for 30 min, a clear and transparent solution was obtained, and the obtained solution was transferred to a weighing bottle containing polystyrene microsphere photonic crystals. It was evaporated and dried at 80°C for 24 hours to obtain a pale yellow solid. The light yellow solid was placed in a tube furnace in a nitrogen atmosphere and calcined at 1200° C. for 2 hours to obtain the multi-level ordered macroporous / mesoporous carbon-molybdenum carbide composite material. The heating rate during the roasting process was set at 5 °C min -1 .
[0070] See Figure 9 , Figure 9 Transmission electron microscope images show that the obtained material has both macropores and mesopores, and the pore diameters of the macropores and mesopores are ~500nm and 5nm, respectively.
Embodiment 3
[0072] Add 1.5g of F127, 0.1g of resole phenolic resin, and 0.02g of tungsten acetylacetonate into 16mL of ethanol solution in sequence. After stirring at room temperature for 30 min, a clear and transparent solution was obtained, and the obtained solution was transferred to a weighing bottle containing polystyrene microsphere photonic crystals. It was evaporated and dried at 80°C for 24 hours to obtain a pale yellow solid. The light yellow solid was placed in a tube furnace in a nitrogen atmosphere and calcined at 1200° C. for 2 hours to obtain the multi-level ordered macroporous / mesoporous carbon-tungsten carbide composite material. The heating rate during the roasting process was set at 5 °C min -1 .
[0073] See Figure 10 , Figure 10 Transmission electron microscope images show that the obtained material has both macropores and mesopores, and the pore diameters of the macropores and mesopores are ~500nm and 5nm, respectively.
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