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Aqueous Lithium-Air Battery Quiz

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Questions and Answers

What is the main advantage of lithium air batteries?

High theoretical specific energy of lithium (correct)
High conductivity of the electrolyte
Low weight of lithium
High specific energy of oxygen

How is the lithium electrode protected in lithium air batteries?

By a porous membrane
By a layer of lithium hydroxide
By a layer of lithium oxide
By a solid electrolyte interphase (SEI) (correct)

What are the proposed main discharge products in non-aqueous lithium air batteries?

Li2CO3 and LiOH
LiOH and H2O
Li2CO3 and Li2O
Li2O2 and Li2O (correct)

Why does the oxygen electrode need to be porous in lithium air batteries?

To allow the transport of gases (D) Signup and view all the answers

In the case of aqueous lithium–oxygen batteries, what are the theoretical specific energies like compared to non-aqueous lithium air batteries?

Lower (B) Signup and view all the answers

What happens when sunlight is incident on silicon solar cells?

Photon strikes on p-n junction, creating electron hole pair which diffuses towards respective layers based on affinity (D) Signup and view all the answers

What is the main reason for low efficiencies in two-component organic photovoltaics (OPV) initially?

Reliance on bilayer cells made exciton dissociation and diffusion challenging (B) Signup and view all the answers

What is the role of the acceptor in organic photovoltaics (OPV)?

To assist in dissociating excitons and accepting electrons (C) Signup and view all the answers

What is the approximate distance excitons can diffuse in organic photovoltaics (OPV)?

Approximately 10nm (A) Signup and view all the answers

What happens when electron hole pair diffuses towards the n-type layer in silicon solar cells?

Current is generated in the externally connected circuit (A) Signup and view all the answers