METHOD FOR PREPARING FREE-STANDING ELECTRODE MEMBRANE AND FREE-STANDING ELECTRODE MEMBRANE PREPARED THEREBY

In an embodiment a method for preparing a free-standing electrode membrane includes preparing a composition for forming an electrode, the composition including an electrode active material, a conductive material, a solid electrolyte, and a binder, first mixing the composition in a first mixer to form a first mixture, pressing the first mixture to form a membrane-shaped aggregate, second mixing the aggregate in a second mixer to form a second mixture and pressing the second mixture to prepare the free-standing electrode membrane.