(c) Will the lithium cobalt oxide cathode expand or contract as lithium ions are inserted?

Question

Accepted Answer

everyone in this example we have the following statement which says that the lithium cobalt oxide in a discharging lithium ion battery is blank for every lithium ion inserted. So we should recall that for lithium cobalt oxide. We have the following ions which would be R. L. I. Plus one ion. And then we would recall that cobalt because it's a transition metal occurs in the D. Block and has multiple ions. Being our Ceo three plus. Sorry that should be c. 0. 3 plus caddy on. And our Ceo four plus cat ion. And so because we have cat ions with a positive charge, we would say that therefore the electrode replace our lithium cobalt oxide in is placed in the cathode, which we recall occurs with a positive charge. So we can say that overall as lithium ions are inserted in the cathode, smaller Cobalt four plus ions are reduced. Two larger Cobalt three plus ions which ultimately expands our lithium cobalt oxide. And so to complete this example based on what we've outlined below, we can agree that the proper answer choice would be choice a where we would fill in saying that the lithium cobalt oxide in a discharging lithium ion battery expands for every lithium ion inserted. So I hope that everything I explained was clear. If you have any questions, please leave them down below and I will see everyone in the next practice video

(c) Will the lithium cobalt oxide cathode expand or contract as lithium ions are inserted?

Verified Solution

Key Concepts

Lithium Ion Insertion

Structural Changes in Cathodes

Volume Change and Battery Performance