Energy density and transport balancing of the cathode. After examination of the initial capacity retention (Figure ) and the rate capability (Figure ), cathode composites are now evaluated regarding their (rate dependent) gravimetric energy density. In agreement with the discussion of the rate capability, the energy density is calculated from the average capacities of five cycles at a certain current density step, and the average and standard deviation of triplicates (with that relating to the data depicted Figure ). Furthermore, only the mass of the cathode, the In/LiIn and the separator are considered for calculation of the gravimetric energy density. The latter two are constant for all investigated cathodes.