A lithium-ion couple pairs an iron-phosphate cathode ( )

PHYSICS · Multi-part · Fermi University Physics · Earth, Climate & Energy Physics · Energy systems, storage and demand · Energy systems, storage and demand

Energy from Physics, Ch Storing energy: cells, rotors, air, heat and hydrogen

Problem

A lithium-ion couple pairs an iron-phosphate cathode (LiFePO4\mathrm{LiFePO_4}), of theoretical capacity 170 mAh g−1170\,\mathrm{mAh\,g^{-1}}, against a graphite anode of theoretical capacity 372 mAh g−1372\,\mathrm{mAh\,g^{-1}}. The cell's terminal voltage is 3.3 V3.3\,\mathrm{V}. ((a)) Find the couple's specific capacity, combining the two electrodes as capacities in series (equal charge through unequal masses). ((b)) Find the theoretical specific energy of the couple, per kilogram of active material.

Browse the problem library