Li-ion batteries used in automobiles typically use a LiMn₂O₄ cathode in place of the LiCoO₂ cathode found in most Li-ion
batteries.

(a) Calculate the mass percent lithium in each electrode material?

(b) Which material has a higher percentage of lithium? Does this help to explain why batteries made with LiMn₂O₄ cathodes deliver less power on discharging?

(c) 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?