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Double-electrolyte aluminum air battery

A technology for electrolyte aluminum and air batteries, which can be applied to aqueous electrolyte batteries, fuel cells, electrical components, etc., and can solve problems such as increasing the cost of aluminum-air batteries

Inactive Publication Date: 2019-09-13
JIANGSU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, alloys also add to the cost of aluminum-air batteries

Method used

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Examples

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Effect test

Embodiment 1

[0034] Mix sodium hydroxide with deionized water to prepare 1 mol / L NaOH aqueous solution as catholyte; mix potassium chloride with deionized water to prepare 1 mol / L KCl aqueous solution as anolyte, use polymer cation exchange membrane. Such as figure 2 shown at 0.5 mA / cm 2 Under constant current discharge, the voltage platform is 0.58V, and the specific capacity can reach 2500 mAh / g.

Embodiment 2

[0036] Mix ammonia gas with deionized water to prepare 1 mol / L ammonia water as catholyte; mix sodium chloride with deionized water to prepare 3 mol / L NaCl aqueous solution as anolyte, using polymer cation exchange membrane. Such as image 3 shown at 0.5 mA / cm 2 Under constant current discharge, the voltage platform is 0.65V, and the specific capacity can reach 2400 mAh / g.

Embodiment 3

[0038] Mix lithium hydroxide, sodium hydroxide and deionized water to prepare a mixed aqueous solution of 1 mol / L LiOH and 0.5 mol / L NaOH as the catholyte; mix ammonium chloride with deionized water to prepare 8 mol / L L N 4Cl aqueous solution, as the anolyte, using a solid ceramic membrane. Such as Figure 4 shown at 0.5 mA / cm 2 Under constant current discharge, the voltage platform is 0.63V, and the specific capacity can reach 2500 mAh / g.

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Abstract

The invention relates to the field of aluminum air batteries, and discloses a double-electrolyte aluminum air battery. The double-electrolyte aluminum air battery comprises an aluminum anode (8), an anode reaction room (7), a diaphragm (6), a cathode reaction room (5) and an air cathode (4), wherein the cathode reaction room (5) and the anode reaction room (7) are separated by the diaphragm (6); electrolyte channels are arranged on the reaction rooms; electrolyte filling can be performed outside; and a cathode electrolyte and an anode electrolyte can enter the cathode reaction room (5) and theanode reaction room (7) from the respective electrolyte channels to participate in reaction. According to the double-electrolyte aluminum air battery, self-corrosion of the aluminum anode of the aluminum air battery in a high-concentration strong-basicity solution can be effectively avoided; high oxygen reduction reaction activity of the air cathode can be ensured; and the double-electrolyte aluminum air battery has the biggest characteristic that a common aluminum sheet can serve as the aluminum anode without a special alloy. Compared with a single-electrolyte neutral solution, the double-electrolyte aluminum air battery avoids a defect of electrode and reaction room blocking caused by quick sediment generation.

Description

technical field [0001] The invention relates to the field of aluminum-air batteries, in particular to a double-electrolyte aluminum-air battery. Background technique [0002] Nowadays, with the depletion of fossil energy and the serious environmental load it brings. Therefore, automobiles are tending to be electrified, and the use of rechargeable batteries, metal fuel cells, and hydrogen fuel cells as new power sources for automobiles is being extensively researched and developed. [0003] Aluminum-air battery is a metal fuel cell, which uses aluminum as the anode, oxygen as the cathode, and alkaline or neutral solution as the electrolyte. Compared with other batteries, aluminum-air batteries have superior battery life. The theoretical specific energy value of aluminum-air batteries is 8100 wh / kg, but in practical applications it can only reach up to 350 wh / kg, so there is still a lot of room for improvement in its specific energy. [0004] However, aluminum has a serious...

Claims

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Application Information

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IPC IPC(8): H01M12/06H01M8/083H01M6/04
CPCH01M6/045H01M8/083H01M12/065Y02E60/50
Inventor 陈荣华杨建红温合静刘钟升乔佳赵睿杰谢佳栋
Owner JIANGSU UNIV
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