Li-ion batteries used in automobiles typically use a LiMn2O4 cathode in place of the LiCoO2 cathode found in most Li-ion batteries.
In a battery that uses a LiCoO2 cathode approximately 50% of the lithium migrates from the cathode to the anode on charging. In a battery that uses a LiMn2O4 cathode what fraction of the lithium in LiMn2O4 would need to migrate out of the cathode to deliver the same amount of lithium to the graphite anode?
In this problem, we are asked to find the fraction of the lithium in LiMn2O4 that would need to migrate out of the cathode to deliver the same amount of lithium to the graphite anode.
Recall that a battery is a portable, self-contained electrochemical power source that consists of one or more voltaic cells.
To solve this problem:
Step 1. Find the percent of Lithium in each cathode.
Step 2. Compare the percent of lithium content of the two cathodes.
Step 3. Determine the fraction or percent needed.