Typical compositions of nickelmetal hydride (NiMH) batteries are shown below: (a) Write equations to show the processes

Question:

Typical compositions of nickel–metal hydride (NiMH) batteries are shown below:

(a) Write equations to show the processes at the anode and cathode during charging and discharging a NiMH cell.

(b) What is the overall cell reaction? Confirm that the changes in oxidation states for reduction and oxidation reactions balance.

(d) Why is Fe needed in the battery?

(e) During battery recycling, suggest a method of recovering Co and Ni.

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Inorganic Chemistry

ISBN: 9781292134147

5th Edition

Authors: Catherine Housecroft

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Question Posted: Jul 23, 2023 03:47 AM

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Typical compositions of nickelmetal hydride (NiMH) batteries are shown below: (a) Write equations to show the processes

Question:

Component Ni Fe Co La, Ce, Nd, Pr Graphite K H/O Plastics Other Button cell / % by mass 29-39 31-47 2-3 6-8 2-3 1-2 8-10 1-2 2-3 Cylindrical cell / % by mass 36-42 22-25 3-4 8-10 <1 1-2 15-17 3-4 2-3

Step by Step Answer:

a Equations for processes at the anode and cathode during charging and discharging a NiMH cell Charging Anode oxidation MH metal hydride OH M metal H2O e Cathode reduction NiOOH H2O e NiOH2 OH Dischar...View the full answer

Inorganic Chemistry

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