| 摘要 |
In a sodium sulphur cell having a cathode electrode comprising a porous carbon material between a solid electrolyte 12 and a cathode current collector 14, to prevent or reduce corrosion of the current collector, the porous carbon material comprises a main body of first material 19 with a bulk electronic resistivity not exceeding 20 ohm cm measured in the direction across the cathodic region between the electrolyte 12 and the current collector 14 together with a second material of at least twice the conductivity of the first material and extending not more than 25% of the distance from the current collector to the electrolyte. <IMAGE> |
