A kind of composite corrosion inhibitor and its alkaline electrolyte and aluminum-air battery added with the composite corrosion inhibitor

Abstract

The invention belongs to the technical field of fuel cells and particularly discloses an electrolyte composite corrosion inhibitor comprising an alkyl glycoside and a tin source. The invention also includes the application of the composite corrosion inhibitor for the preparation of an alkaline electrolyte for a metal air fuel cell. The present invention also provides the alkaline electrolyte comprising the composite corrosion inhibitor and an aluminum air battery containing the electrolyte. The alkyl glycoside and the tin source of the invention have a synergistic effect, the hydrogen evolution can be effectively inhibited, the self-discharge of the battery can be greatly reduced, at the same time, the voltage of the battery can be raised to a certain extent. The electrolyte with the bestproportioning additive is used in the aluminum air battery, the corrosion inhibition efficiency can reach 94.14%, and the life of a battery with the electrolyte formula is extended by more than threetimes compared with that of a battery with an electrolyte without the additive.

Description

technical field

[0001] The invention relates to an electrolyte composite corrosion inhibitor, an aluminum-air battery electrolyte and a preparation method thereof, and an aluminum-air battery, belonging to the field of aluminum-air batteries. Background technique

[0002] Metal-air fuel cells are electrochemical energy conversion devices that directly convert chemical energy stored in metals (such as Mg, Al or Zn) into electrical energy. In recent years, metal-air fuel cells have attracted considerable attention because of their many unique advantages, such as their environmental friendliness and wide-ranging sources. Aluminum air fuel cell due to its high theoretical energy density (8100Whkg -1 ), mechanically rechargeable and recyclable products (i.e. Al(OH) 3 ) and is considered to be an attractive next-generation new battery. Furthermore, aluminum, the most geologically abundant metal, has a very negative thermodynamic electrode potential in alkaline media. These adv...

Examples

Embodiment 1

[0046] The electrolyte composite corrosion inhibitor of this embodiment is composed of potassium stannate and aminoglycoside; wherein the molar ratio of potassium stannate and aminoglycoside APG0810 is 25:1.

[0047] The aluminum-air battery electrolyte of the present embodiment includes KOH, potassium stannate, alkyl glycoside, and water; the concentration of alkyl glycoside in the electrolyte is 2mmol / L, the concentration of potassium stannate is 0.05mol / L, and the concentration of KOH is 5mol / L.

[0048] The preparation method of the aluminum-air battery electrolyte of the present embodiment comprises the following steps:

[0049] Preparation concentration is the potassium hydroxide solution of 5mol / L, cools down to room temperature, then adds the potassium stannate of formula quantity in potassium hydroxide solution, stirs, dissolves completely; Potassium in potassium hydroxide solution, stirring to dissolve.

[0050] The aluminum-air battery of this embodiment uses the ...

Embodiment 2

[0052] The electrolyte composite corrosion inhibitor of this embodiment is composed of potassium stannate and alkyl glycoside; wherein the molar ratio of potassium stannate and alkyl glycoside APG0810 is 500:8.

[0053] The aluminum-air battery electrolyte of this embodiment includes KOH, alkyl glycosides, potassium stannate, and water; the concentration of alkyl glycosides in the electrolyte is 0.8mmol / L, the concentration of potassium stannate is 0.05mol / L, KOH The concentration is 5mol / L.

[0054] The preparation method of the aluminum-air battery electrolyte of the present embodiment comprises the following steps:

[0055] Preparation concentration is the potassium hydroxide solution of 5mol / L, cools down to room temperature, then adds the potassium stannate of formula quantity in potassium hydroxide solution, stirs, dissolves completely; Potassium in potassium hydroxide solution, stirring to dissolve.

[0056] The aluminum-air battery of this embodiment uses the above-m...

Embodiment 3

[0058] The electrolyte composite corrosion inhibitor of this embodiment is composed of potassium stannate and alkyl glycoside; wherein the molar ratio of potassium stannate and alkyl glycoside APG1214 is 70:1.

[0059] The aluminum-air battery electrolyte of the present embodiment includes KOH, potassium stannate, alkyl glycoside and water; the concentration of alkyl glycoside in the electrolyte is 1mmol / L, the concentration of potassium stannate is 0.07mol / L, and the concentration of KOH The concentration is 6mol / L.

[0060] The preparation method of the aluminum-air battery electrolyte of the present embodiment comprises the following steps:

[0061] The preparation concentration is the potassium hydroxide solution of 6mol / L, cools down to room temperature, then adds the alkyl glucoside of formula quantity in potassium hydroxide solution, stirs, dissolves completely; In the potassium hydroxide solution of the glycoside, stir to dissolve.

[0062] The aluminum-air battery o...

technical field

[0001] The invention relates to an electrolyte composite corrosion inhibitor, an aluminum-air battery electrolyte and a preparation method thereof, and an aluminum-air battery, belonging to the field of aluminum-air batteries. Background technique

[0002] Metal-air fuel cells are electrochemical energy conversion devices that directly convert chemical energy stored in metals (such as Mg, Al or Zn) into electrical energy. In recent years, metal-air fuel cells have attracted considerable attention because of their many unique advantages, such as their environmental friendliness and wide-ranging sources. Aluminum air fuel cell due to its high theoretical energy density (8100Whkg -1 ), mechanically rechargeable and recyclable products (i.e. Al(OH) 3 ) and is considered to be an attractive next-generation new battery. Furthermore, aluminum, the most geologically abundant metal, has a very negative thermodynamic electrode potential in alkaline media. These adv...

Examples

Embodiment 1

[0046] The electrolyte composite corrosion inhibitor of this embodiment is composed of potassium stannate and aminoglycoside; wherein the molar ratio of potassium stannate and aminoglycoside APG0810 is 25:1.

[0047] The aluminum-air battery electrolyte of the present embodiment includes KOH, potassium stannate, alkyl glycoside, and water; the concentration of alkyl glycoside in the electrolyte is 2mmol / L, the concentration of potassium stannate is 0.05mol / L, and the concentration of KOH is 5mol / L.

[0048] The preparation method of the aluminum-air battery electrolyte of the present embodiment comprises the following steps:

[0049] Preparation concentration is the potassium hydroxide solution of 5mol / L, cools down to room temperature, then adds the potassium stannate of formula quantity in potassium hydroxide solution, stirs, dissolves completely; Potassium in potassium hydroxide solution, stirring to dissolve.

[0050] The aluminum-air battery of this embodiment uses the ...

Embodiment 2

[0052] The electrolyte composite corrosion inhibitor of this embodiment is composed of potassium stannate and alkyl glycoside; wherein the molar ratio of potassium stannate and alkyl glycoside APG0810 is 500:8.

[0053] The aluminum-air battery electrolyte of this embodiment includes KOH, alkyl glycosides, potassium stannate, and water; the concentration of alkyl glycosides in the electrolyte is 0.8mmol / L, the concentration of potassium stannate is 0.05mol / L, KOH The concentration is 5mol / L.

[0054] The preparation method of the aluminum-air battery electrolyte of the present embodiment comprises the following steps:

[0055] Preparation concentration is the potassium hydroxide solution of 5mol / L, cools down to room temperature, then adds the potassium stannate of formula quantity in potassium hydroxide solution, stirs, dissolves completely; Potassium in potassium hydroxide solution, stirring to dissolve.

[0056] The aluminum-air battery of this embodiment uses the above-m...

Embodiment 3

[0058] The electrolyte composite corrosion inhibitor of this embodiment is composed of potassium stannate and alkyl glycoside; wherein the molar ratio of potassium stannate and alkyl glycoside APG1214 is 70:1.

[0059] The aluminum-air battery electrolyte of the present embodiment includes KOH, potassium stannate, alkyl glycoside and water; the concentration of alkyl glycoside in the electrolyte is 1mmol / L, the concentration of potassium stannate is 0.07mol / L, and the concentration of KOH The concentration is 6mol / L.

[0060] The preparation method of the aluminum-air battery electrolyte of the present embodiment comprises the following steps:

[0061] The preparation concentration is the potassium hydroxide solution of 6mol / L, cools down to room temperature, then adds the alkyl glucoside of formula quantity in potassium hydroxide solution, stirs, dissolves completely; In the potassium hydroxide solution of the glycoside, stir to dissolve.

[0062] The aluminum-air battery o...

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