During the discharge of SOCl2/Li batteries, the LiCl deposits mainly at the entrance of the widest pores. C/Ni/PTFE cathodes were prepared with 12 varieties of carbon materials. The discharge is strongly depending upon the carbon used. The capacity of the battery is mainly correlated to the pore volume of the cathode. However, for cathodes with a significant pore volume, the capacity is also correlated to the specific surface area.