Abstract: A cylindrical secondary battery including a battery unit including a wound first electrode plate, separator, and second electrode plate, and first and second electrode tabs respectively protruding from the first and second electrode plates; a can for accommodating the battery unit; a cap assembly for sealing an opening of the can; and a first insulation plate in the can and on an upper portion of the battery unit, the first insulation plate being configured to prevent a short between the first electrode tab and the second electrode plate having different polarities, wherein the first insulation plate includes a linear small aperture through which the first electrode tab extends and a circular small aperture for injection of an electrolyte, and the linear and circular small apertures are disposed in a region equal to or less than 50% of the first insulation plate.

Abstract: Electric field driven devices and methods of operation are provided. Each device use one or more doped conducting polymers to provide multifunctional responses to applied electric field. The device includes an electrically conductive layer operative to provide a gate contact for the device; a conducting polymer layer operative to provide source and drain contacts for the device, and an active layer; and an insulating polymer layer formed between the electrically conductive layer and the conducting polymer layer, wherein the layers in combination allow the device to be operative to perform at least two of a plurality of response functions.