Assembly for electrochemical system, stack and electrochemical system

The invention relates to an assembly (50) for an electrochemical system (1), comprising a separator (2) having at least one layer (2a) and a membrane electrode assembly MEA (10), the MEA (10) having: an electrochemically active region; a frame-like reinforcement layer (15), which surrounds the electrochemically active region; and at least one tab (30) for positioning the MEA (10) relative to the separator (2) and/or for fastening the MEA (10) to the separator (2), in which the layer (2a) has a first flat side (71a) and a second flat side (72a) opposite the first flat side (71a), in which the tab (30) is connected on one side to the frame-like reinforcement layer (15) and the free end (35) of the tab is arranged on the side of the second flat side (72a) of the layer (2a), a frame-like reinforcing layer (15) is arranged on the first flat side (71a) of the layer (2a). 本发明涉及一种用于电化学系统(1)的组件(50)，包括具有至少一个层(2a)的隔板(2)和膜电极组件MEA(10)，该MEA(10)具有：电化学活性区域；框架状加强层(15)，该框架状加强层(15)围绕电化学活性区域；以及至少一个凸片(30)，凸片(30)用于将MEA(10)相对于隔板(2)