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Electrolyte for aluminum alloy anode material and slow release agent of electrolyte

A technology of anode material and electrolyte, which is applied in the field of electrolyte for aluminum alloy anode materials and its slow-release agent, can solve the problems of reduced battery life and difficulty in shedding, and achieves extended battery life, high safety, and improved discharge performance Effect

Pending Publication Date: 2022-05-27
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the corrosion product of aluminum alloy anode is flocculent Al(OH) 3 , it is very difficult to fall off from the surface of the anode, and it is easy to form product accumulation, which seriously reduces the service life of the battery

Method used

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  • Electrolyte for aluminum alloy anode material and slow release agent of electrolyte
  • Electrolyte for aluminum alloy anode material and slow release agent of electrolyte
  • Electrolyte for aluminum alloy anode material and slow release agent of electrolyte

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Electrolyte composition: matrix composition is 3.5% NaCl; sustained release agent is 0.5mol / L KOH.

[0033] The utilization rate and specific energy of aluminum alloy anode in the above electrolyte were tested by electronic load, and the current density was 1 mA / cm 2 , the cut-off voltage is 0.3V, and the results are shown in Table 1.

Embodiment 2

[0035] Electrolyte composition: matrix composition is 3.5%NaCl; sustained release agent is 0.6mol / LNa 2 SnO 3 .

[0036] The utilization rate and specific energy of aluminum alloy anode in the above electrolyte were tested by electronic load, and the current density was 1 mA / cm 2 , the cut-off voltage is 0.3V, and the results are shown in Table 1.

Embodiment 3

[0038] Electrolyte composition: the matrix composition is 3.5% NaCl; the slow release agent is 0.8mol / LZnO.

[0039] The utilization rate and specific energy of aluminum alloy anode in the above electrolyte were tested by electronic load, and the current density was 1 mA / cm 2 , the cut-off voltage is 0.3V, and the results are shown in Table 1.

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Abstract

The invention discloses an electrolyte for an aluminum alloy anode material and a slow release agent of the electrolyte, and belongs to the field of metal-air batteries. The electrolyte system is composed of a matrix component and a slow release agent. The matrix component is one or two of NaCl and KCl, and the concentration of the matrix component is 1%-10%. The slow-release agent is one or more than two of KOH, NaOH, Na2SnO3 or ZnO, and the total concentration range of the added slow-release agent is 0.05 mol / L to 2 mol / L. The electrolyte and the slow release agent thereof can effectively improve the product state of an aluminum alloy anode material in the neutral electrolyte, and flocculent precipitates which are difficult to fall off are converted into fine particles; the aluminum alloy anode hydrogen evolution corrosion rate is reduced, the service life of the aluminum alloy anode is prolonged, and the anode utilization rate is increased. And on the other hand, the discharge voltage of the aluminum alloy anode in the electrolyte system is improved, and the electrochemical activity is enhanced. The electrolyte system disclosed by the invention has the advantages of low cost, high safety, simplicity in operation, environment friendliness and the like, and has important significance on prolonging the service life of the battery and improving the discharge performance.

Description

technical field [0001] The invention belongs to the field of metal-air batteries, and particularly relates to an electrolyte for an aluminum alloy anode material and a sustained release agent thereof. Background technique [0002] Aluminum as a battery anode material has the following unique advantages: (1) high electrochemical equivalent (2980Ah / kg), which can provide high-power discharge; (2) the electrode potential is relatively negative, and the standard electrode potential is -1.66V vs. SCE. For anode materials, the electrode potential is about negative, which can provide higher discharge voltage for batteries; (3) abundant resources and low price; (4) aluminum is an amphoteric metal, which can be used in neutral and alkaline batteries. Wide range. In conclusion, aluminum alloy anode is a promising battery anode material. [0003] In the neutral electrolyte system, the dense oxide film on the surface of the aluminum alloy anode causes the actual electrode potential to...

Claims

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Application Information

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IPC IPC(8): H01M6/04H01M12/06
CPCH01M6/045H01M12/06H01M2004/027H01M2300/0002H01M2300/0014H01M2300/0088Y02E60/10
Inventor 王二东高山山高建新孙公权
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI