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Biomass carbon material derived transition metal-based catalyst, preparation method and application thereof, and solid-state zinc-air battery

A technology of transition metals and biomass carbon, applied in fuel cell half-cells and primary battery half-cells, battery electrodes, circuits, etc., can solve problems that limit the popularization and application of zinc-air batteries

Active Publication Date: 2021-10-29
YUNNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, in the current research work, the actual energy density of solid-state zinc-air batteries cannot be achieved far exceeding that of lithium-ion batteries, which also limits the further popularization and application of zinc-air batteries.

Method used

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  • Biomass carbon material derived transition metal-based catalyst, preparation method and application thereof, and solid-state zinc-air battery
  • Biomass carbon material derived transition metal-based catalyst, preparation method and application thereof, and solid-state zinc-air battery
  • Biomass carbon material derived transition metal-based catalyst, preparation method and application thereof, and solid-state zinc-air battery

Examples

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preparation example Construction

[0031] The invention provides a method for preparing a transition metal-based catalyst derived from a biomass carbon material, comprising the following steps:

[0032] The mushroom spores are pre-carbonized and carbonized in sequence to obtain carbonized products;

[0033] mixing the carbonized product with an activator for activation to obtain a catalyst carrier;

[0034] Mixing the catalyst carrier, transition metal precursor and organic solvent, and calcining to obtain a transition metal-based catalyst derived from a biomass carbon material;

[0035] The transition metal precursor includes m-tetraphenylporphyrin ferric chloride, 5,10,15,20-tetrakis(4-methoxyphenyl)-21H,23H-porphine cobalt or nickel salt.

[0036] In the present invention, unless otherwise specified, the required preparation materials are commercially available products well known to those skilled in the art.

[0037] In the invention, the mushroom spores are pre-carbonized and carbonized in sequence to ob...

Embodiment 1

[0060] Place the mushroom spores in a tube furnace for pre-carbonization at 300°C for 120 min with a heating rate of 1°C / min, and continue to carbonize the resulting product in a tube furnace at 800°C for 2 h in a nitrogen atmosphere at a heating rate of 5°C / min. min, get the carbonized product;

[0061] 90 mg of the carbonized product and 180 mg of potassium hydroxide were mixed and ground with a mortar until the mixture was powdery, and the ground mixture was activated in a tube furnace at 800 ° C for 2 h under a nitrogen atmosphere at a heating rate of 5 ° C / min, the resulting product was centrifuged with ethanol and ultrapure water until the solution was neutral, and then dried in an oven at 60°C to obtain a catalyst carrier;

[0062] Dissolve 10mg m-tetraphenylporphyrin iron (III) chloride in 20mL tetrahydrofuran, place in a fume hood and stir at room temperature for 30min, take 80mg of the above catalyst carrier and disperse it in 40mL tetrahydrofuran, place in a fume ...

Embodiment 2

[0064] The only difference between this example and Example 1 is that the transition metal precursor is replaced with 6.65 mg of 5,10,15,20-tetrakis(4-methoxyphenyl)-21H,23H-porphine cobalt(II), and Tetrahydrofuran was replaced by ethanol, and the mass of the catalyst carrier was replaced by 50 mg. Others were the same as in Example 1. The loading amount of Co atoms on the catalyst carrier was 0.98 wt%, and the obtained catalyst was recorded as Co@CS-8.8.

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Abstract

The invention provides a biomass carbon material derived transition metal-based catalyst, a preparation method and application thereof, and a solid-state zinc air battery, and belongs to the technical field of zinc air batteries. According to the invention, mushroom spores are used as a carbon source, and the mushroom spores mainly contain C, N and O, so that the determination of active sites of the catalyst is not influenced. Moreover, the mushroom spores show a porous characteristic after being carbonized and activated, so that loading of a metal precursor and exposure of active sites are facilitated, and the overall catalytic activity of the catalyst is effectively improved. The transition metal precursor is subjected to heat preservation to form a single metal atom supported catalyst, transition metal atoms are uniformly dispersed on the catalyst carrier, and the catalytic activity of the catalyst can be remarkably improved. When the single metal atom supported catalyst is used for the solid-state zinc-air battery, the discharge potential of the battery can be remarkably improved, that is, the power density of the battery is improved.

Description

technical field [0001] The invention relates to the technical field of zinc-air batteries, in particular to a transition metal-based catalyst derived from biomass carbon materials, a preparation method and application thereof, and a solid-state zinc-air battery. Background technique [0002] Zinc-air batteries are divided into liquid zinc-air batteries and solid-state zinc-air batteries. Compared with liquid zinc-air batteries, solid-state zinc-air batteries are more suitable for some portable or wearable devices. At present, the layered sandwich structure is the main configuration of solid-state zinc-air batteries, mainly composed of zinc electrodes, air electrodes and an electrolyte membrane in the middle. However, liquid zinc-air batteries are prone to leakage, which will affect the efficiency of the battery. In addition, the liquid alkaline electrolyte is easier to react with the CO in the air 2 In the reaction, insoluble carbonate by-products are generated on the surf...

Claims

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Application Information

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IPC IPC(8): H01M4/90H01M4/88H01M12/06
CPCH01M4/9083H01M4/9041H01M4/8878H01M12/06
Inventor 张龙舟苏家楠
Owner YUNNAN UNIV
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