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Zinc Air Batteries: Construction and Components

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Zinc Air Batteries: Construction and Components

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Questions and Answers

What is the primary component of the anode in a zinc air battery?

Nickel wire mesh
Zinc granules (correct)
MnO2
Carbon

What is the purpose of the gelling agent in the anode?

To reduce the electrolyte amount
To immobilize the composite (correct)
To increase the surface area
To enhance the reaction rate

What is the role of the air access holes in the cathode?

To increase the surface area of the cathode
To reduce the voltage of the battery
To allow oxygen to enter the battery (correct)
To provide a pathway for electrolyte to flow

What is the primary function of the separator in a zinc air battery?

To prevent mixing of the anode and cathode materials (B) Signup and view all the answers

What is the overall reaction that occurs in a zinc air battery?

Zn + 1/2O2 → ZnO + H2O + 2e- (A) Signup and view all the answers

What is the advantage of a zinc air battery in terms of energy storage?

High energy density (C) Signup and view all the answers

What is a disadvantage of zinc air batteries?

Limited power output (D) Signup and view all the answers

What is the purpose of the MnO2 in the cathode?

To act as a catalyst (D) Signup and view all the answers

What is the electrochemical reaction that occurs at the anode?

Zn → Zn2+ + 2e- (B) Signup and view all the answers

What is the voltage of a zinc air battery?

1.4 V (A) Signup and view all the answers