Flexible electrode assembly and electrochemical device having the electrode assembly

An electrochemical device comprising:

• an electrode assembly;
• an electrolyte;
• and
• an exterior member which contains the electrode assembly and the electrolyte,
• wherein the electrode assembly comprises:
• an electrode stack structure comprising:
• a first electrode assembly sheet having flexibility;
• and
• a second electrode assembly sheet having flexibility, wherein
• the first and second electrode assembly sheets are alternately disposed one on another;
• and
• a binding unit which binds a portion of the electrode stack structure,
• wherein the first electrode assembly sheet comprises:
• a first separator film;
• a second separator film disposed opposite to the first separator film;
• a first electrode sheet disposed between the first and second separator films, wherein the first electrode sheet comprises a first electrode collector and a first active material layer;
• and
• a first confining unit which restricts a movement of the first electrode sheet with respect to the first and second separator films.