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An electrochemical actuator forms a sealed gas space inside of which there are a plurality of cells. Each cell has a solid electrode made from an electrochemically reversibly oxidizable material and a counter electrode. By applying a reversible direct current, an electrochemical reaction is initiate

An electrochemical actuator forms a sealed gas space inside of which there are a plurality of cells. Each cell has a solid electrode made from an electrochemically reversibly oxidizable material and a counter electrode. By applying a reversible direct current, an electrochemical reaction is initiated which results in a pressure increase or decrease in the gas space that can be used for generating movement. The manufacture of the actuator is simplified and manufacturing costs are lowered by providing a stackable spacer frame for each cell which is constructed of a material that is a relatively good heat conductor and an electric isolator. The rim of a metallic cell cup is attached to the spacer frame and a matrix soaked with an electrolyte is placed inside the cup. Each cell further has a solid electrode, a separator and a counter electrode which, together with the spacer frame, are assembled into a cell. When the cells are stacked, the counter electrode of each cell is placed against the cell cup of the adjoining cell.

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An electrochemical actuator with a sealed gas space and a plurality of cells each including a solid body electrode made of an electrochemically reversibly oxidizable material and a counter electrode, wherein a reversible electrochemical reaction initiated by a D.C. current causes a pressure increase

An electrochemical actuator with a sealed gas space and a plurality of cells each including a solid body electrode made of an electrochemically reversibly oxidizable material and a counter electrode, wherein a reversible electrochemical reaction initiated by a D.C. current causes a pressure increase or a pressure decrease in the gas space which can be transformed into motion, characterized in that each cell is defined by a stackable, frame-shaped spacer constructed of a material which is an electric isolator and has good heat conducting characteristics, the spacer receiving a rim of a metal cell cup (13) holding a matrix (15) soaked with an electrolyte, a solid body electrode (16), a separator (17) and a counter electrode (18), and wherein in a stack the counter electrode (18) of each cell (7) engages the cell cup (13) of the adjacent cell (7).