Abstract
Twelve different carbons having a large variation in physical properties such as particle size, BET surface area, density, and electrical conductivity were evaluated as cathodes for 
hermetic D cells. The particle size, BET surface area, and density did not affect the performance of the cells in terms of delivered energy density except in extreme cases such as graphite, the particle size of which is larger by three orders of magnitude. At least five different types of carbon were found to be as good as Shawinigan Black at high rates.