Electrodes for primary or secondary cells, comprises (A) an active material and (B) a support in the form of an electrically conductive open network structure interspersed as a skeleton in material (A). Network (B) contains (b1) matrix fibres consisting of polyester fibre with a Tg of at least 90 deg C and (b2) reinforcing polymer fibres with Tg and m.pt. above that of (b1).
