The company ZPower is promoting its silver–zinc batteries as replacements for lithium-ion batteries in laptops and cell phones.
- a. What advantages do silver–zinc batteries have over current Li-ion batteries?
- b. Write the
oxidation and reduction half-reactions for ZPower’s proposed battery using this overall cell equation as a guide. Indicate which reactant gets oxidized and which gets reduced.
(a)
Interpretation:
The advantages of Silver-zinc batteries over lithium-ion batteries have to be explained.
Concept introduction:
In any electrochemical reaction, an electron goes from one substance to another substance driven by the oxidation-reduction reaction. Electrochemical cells have two conducting electrodes, called the anode and cathode. The anode is defined as the electrode where oxidation occurs. The cathode is the electrode where reduction takes place. Standard electrode potential
Explanation of Solution
Lithium-ion battery is best choice than the Silver-zinc battery, because ZPower is taking the leading role in launching the next generation of rechargeable, silver-zinc battery for microbattery applications. This advantage battery offers superior performance over traditional technologies delivering
Further the ZPower batteries also offer a green solution since
The mercury-free design is inherently safe due to it is water based electrolyte which is not susceptible to thermal runway.
(b)
Interpretation:
The given overall cell equation which is undergoes for oxidation and reduction reaction has to be identified.
Concept introduction:
Oxidation half-reaction: The oxidation half-reaction is the part of a redox reaction that shows only for the oxidized species with the transferred electrons and its oxidation state increases with the loss of electrons.
Reduction half-reaction: The reduction half-reaction is also the part of a redox reaction (the counter part of oxidation half-reaction) that shows only for the reduced species with the transferred electrons and its oxidation state decreases with the gain of electrons.
Overall reaction: It is combining of two molecules in together.
Example: Hydrogen and oxygen to form water, the cell provides a drinking water supply for the astronauts as well as the electricity for the lights, computer, etc., on the board.
Explanation of Solution
Given overall reaction is,
Solve the oxidation half-reaction:
The given overall equation
This reaction is oxidation half reaction, because the reactant zinc
Solve the Reduction half-reaction:
The given overall equation
This reaction is a reduction half reaction, because the two electrons are on the reactants side, then the reactant
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