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Metal-air battery cathode material and one-step synthesis method thereof

A metal-air battery and cathode material technology, applied in the field of electrochemistry, can solve the problems of poor high rate performance, poor cycle performance, serious electrochemical polarization, etc., and achieve the effects of increasing specific capacity, reducing load, and reducing overpotential

Active Publication Date: 2016-09-21
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to solve the problems of poor high-rate performance, poor cycle performance, and severe electrochemical polarization during charging and discharging in existing metal-air batteries, the present invention provides a metal-air battery cathode material and a one-step synthesis method thereof

Method used

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  • Metal-air battery cathode material and one-step synthesis method thereof
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  • Metal-air battery cathode material and one-step synthesis method thereof

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specific Embodiment approach 1

[0027] Embodiment 1: The structure of the metal-air battery cathode material in this embodiment includes porous carbon and amorphous metal cluster catalyst particles embedded on the surface of the porous carbon. The particle size of the catalyst particles is 1nm-2nm, and the porous carbon has Uniform and ordered ultra-thin macroporous structure, the macropore diameter is 250nm-300nm, there are extremely short mesopore channels on the ultra-thin pore wall, the length of the mesopore channel is 4nm-5nm, and the thickness of the pore wall is 4nm- 5nm.

specific Embodiment approach 2

[0028] Embodiment 2: The one-step synthesis method of the metal-air battery cathode material as described in Embodiment 1 is carried out in the following steps:

[0029] 1. Prepare the solution: Mix 8-10mL of ammonia water with a mass fraction of 28%, 15-20mL of ethanol and 20-25mL of water to obtain solution A; then take 4-5mL of tetraethyl orthosilicate and mix with 40-45mL of ethanol with magnetic stirring Evenly, solution B is obtained;

[0030] 2. Add solution B to A, and after 2-5 minutes, reduce the stirring speed and continue stirring; seal the reaction container mouth with a parafilm, and continue to react for 2-2.5 hours at room temperature; centrifuge, first wash with deionized water for 3 -5 times, then washed 3-5 times with ethanol; the rotating speed is 8000-9000r / min, centrifuged for 3-5 minutes each time; Place in an oven at ℃ for at least 24 hours to obtain silica spheres;

[0031] 3. Preparation of phenolic resin / ethanol solution: First, weigh 4.0-5.0g of p...

specific Embodiment approach 3

[0033] Embodiment 3: This embodiment is different from Embodiment 2 in that the mass fraction of ethanol is 98%-99.9%. Other steps and parameters are the same as those in the second embodiment.

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Abstract

The invention discloses a metal-air battery cathode material and a one-step synthesis method thereof, belongs to the field of electrochemical technique, and particularly relates to a metal-air battery electrode material and a one-step synthesis method thereof. The problems of low high-rate performance, low cycle performance, serious electrochemical polarization in charging and discharging process and the like existing in an existing metal-air battery are solved. The metal-air battery cathode material disclosed by the invention is prepared from a uniformly ordered ultrathin hole wall, a macroporous structure and amorphous metal cluster catalyst particles embedded in the surface of porous carbon. The one-step synthesis method of the metal-air battery cathode material disclosed by the invention comprises the following steps: firstly, preparing a solution; secondly, mixing the prepared solution; thirdly, preparing a phenolic resin / ethanol solution; and fourthly, mixing a metal salt solution and the obtained mixed solution with silicon dioxide balls prepared in the second step to obtain the metal-air battery cathode material obtained through a series of reactions. The metal-air battery cathode material disclosed by the invention is used for battery field.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry, in particular to a metal-air battery electrode material and a one-step synthesis method thereof. Background technique [0002] Metal fuel cells use oxygen in the air as the positive electrode active material in the battery, and metal materials as the negative electrode active material. Since the positive electrode active material comes from oxygen in the air, the theory is endless. The thickness of this electrode is between 0.12-0.5mm. Until 1967, someone improved the above electrode and added a layer of polytetrafluoroethylene to make a waterproof and breathable membrane to form a gas diffusion air electrode with a fixed reaction layer. Work under normal pressure. By the end of the 1960s, high-efficiency zinc-air batteries entered the stage of industrial production and were widely used in many aspects. In the 1970s, due to the successful application of fuel cells in spaceflight and th...

Claims

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Application Information

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IPC IPC(8): H01M4/86H01M4/88H01M4/90H01M12/00
CPCH01M4/86H01M4/88H01M4/90H01M12/00
Inventor 杜春雨杨文存尹鸽平钱正义左朋建程新群马玉林高云智
Owner HARBIN INST OF TECH
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