To compare the influence of pressure to a non-pressurized condition, a cell which was based on was based on BaSnF4 as the electrolyte, a BiF3/CNF/BaSnF4 composite as the cathode and a mixture of Sn/CNF/BaSnF4 as the anode was cycled in a stainless-steel based Swagelok cell, as described elsewhere (see Figure )). This cell shows strong capacity fading from 1 st discharging capacity about 203 mAh/g to below 40 mAh/g on 10 th cycle, and the cell only delivered around 45 % energy efficiency during these cycles (see Figure )).