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Paper-based aluminum air battery with liquid alloy modified anode and preparation method

A liquid alloy, air battery technology, applied in the electrode of primary battery, fuel cell type half cell and primary battery type half cell, etc., can solve the research of aluminum anode surface modification of aluminum air battery, neutral electrolyte discharge Insufficient power and insufficient utilization of aluminum anodes can meet the needs of low-power market applications, achieve miniaturization and light weight, and long discharge time.

Active Publication Date: 2020-09-15
JILIN UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] Due to the high energy density, low cost, and environmental protection of paper-based aluminum-air batteries, people have paid attention to them. At present, the research on paper-based aluminum-air batteries mainly focuses on the parameter optimization of paper thickness, electrolyte type and concentration, and cathode side activity. , no one has directly studied the surface modification of aluminum anodes for aluminum-air batteries
At the same time, the paper-based aluminum-air batteries currently produced generally have problems such as short discharge time, insufficient utilization of aluminum anodes, and insufficient discharge power of neutral electrolytes.

Method used

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  • Paper-based aluminum air battery with liquid alloy modified anode and preparation method

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preparation example Construction

[0050] A method for preparing a paper-based aluminum-air battery with a liquid alloy modified anode, comprising the following steps:

[0051] S1. After choosing two or more of Ga, In, Sn, Zn, and Bi according to the ratio, heat and keep it in an inert gas atmosphere at a temperature 100°C higher than the melting point of the selected element, and it is worth liquid alloy ;

[0052] S2. Alloying the liquid alloy prepared in step S1 at room temperature for 10-24h;

[0053] S3. Mix liquid alloy, surfactant, and solvent according to the ratio of 0.01-10g: 0.01-20g: 10-100ml, and ultrasonically stir for 20-40min to prepare liquid alloy particles;

[0054] S4. Loading the liquid alloy particles on the surface of the aluminum anode;

[0055] S5. The aluminum anode loaded with liquid alloy particles, the paper base, and the air electrode are sequentially superimposed to obtain a paper-based aluminum-air battery, and the low-power discharge can be realized by adding electrolyte to th...

Embodiment 1

[0057] The air electrode is a commercially available air electrode; the paper base is filter paper, and the filter paper is folded to a thickness of 1mm; the aluminum anode is made of a purity of 99%, a thickness of 0.2mm, and an area of ​​1cm 2 aluminum foil; the liquid alloy is 74.5% Ga25.5% In binary alloy, the loading capacity is 50ug / cm 2 ; The electrolyte is 2M NaCl solution.

[0058]1. Preparation of liquid alloy: Weigh Ga and In according to the mass fraction of 74.5% Ga and 25.5% In respectively, put the weighed metal in a high-temperature furnace under nitrogen protection, sinter at 250°C, and sinter at 250°C Heat and keep warm for 1.5 hours. Cool to room temperature after heat preservation, and alloy the obtained liquid alloy at room temperature for 20 hours.

[0059] 2. Preparation of liquid alloy particles: Mix the alloyed liquid alloy with sodium dodecyl sulfate (SDS) and N-methylpyrrolidone (NMP) at a ratio of 2g:1g:20ml, and stir ultrasonically for 30min to o...

Embodiment 2

[0065] The air electrode is a commercially available air electrode; the paper base is filter paper, and the filter paper is folded to a thickness of 0.5mm; the aluminum anode is 99% pure and 0.5mm thick, with an area of ​​1cm 2 aluminum foil; the liquid alloy is 66%Ga13.5%In20.5%Sn ternary alloy, the loading capacity is 10ug / cm 2 ; The electrolyte is 2M NaCl solution.

[0066] 1. Preparation of liquid alloy: Weigh Ga, In and Sn respectively according to the mass fraction of 66% Ga, 13.5% In, and 20.5% Sn, and place the weighed metal in a high-temperature furnace under nitrogen protection at 250°C Sinter, and heat and hold at 250°C for 1.5 hours. Cool to room temperature after heat preservation, and alloy the obtained liquid alloy at room temperature for 24 hours.

[0067] 2. Preparation of liquid alloy particles: Mix the alloyed liquid alloy with sodium dodecyl sulfate (SDS) and N-methylpyrrolidone (NMP) at a ratio of 2g:1g:20ml, and stir ultrasonically for 30min to obtain ...

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Abstract

The invention discloses a paper-based aluminum-air battery with a liquid alloy modified anode, which is composed of three layers of structures, specifically an aluminum anode, a paper base and an airelectrode which are stacked in sequence. Liquid alloy particles are loaded on the surface of the aluminum anode. The liquid alloy particles are composed of two or more of Ga, In, Sn, Bi and Zn and arein a liquid state at the working temperature of the aluminum-air battery. The liquid alloy particles loaded on the surface of the aluminum anode can well activate the aluminum anode, have good discharge performance in a neutral electrolyte and long discharge time, and can meet low-power market application. The invention discloses a preparation method of a paper-based aluminum air battery with a liquid alloy modified anode.

Description

technical field [0001] The invention belongs to the field of metal-air batteries, and relates to a cheap green novel paper-based aluminum-air battery, in particular to a paper-based aluminum-air battery with a liquid alloy modified anode and a preparation method thereof. Background technique [0002] Primary batteries are used as a one-time power source and are usually used when charging is not possible or unnecessary. At present, a variety of small power devices (such as healthcare biosensors, medical diagnostic analysis, wearable electronics, smart packaging, etc.) have emerged in the market and occupy a considerable market share. Most of these devices are cheap and only consume mW or even uW power, and are discarded after use. Therefore, a low-cost, light, portable and green power supply is needed to match it. [0003] Metal-air batteries use different metal materials as anodes, and the air cathode directly uses oxygen in the air, making it have a higher energy density. ...

Claims

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Application Information

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IPC IPC(8): H01M4/06H01M4/08H01M12/06
CPCH01M4/06H01M4/08H01M12/06Y02E60/10
Inventor 高钱王宏超
Owner JILIN UNIV
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