Electrode assembly including electrode units having the same width and different lengths, and battery cell and device including the electrode assembly

An electrode assembly comprising a combination of two or more electrode units having the same width and different lengths,

• wherein the electrode units are stacked so that a stepped portion is formed between the electrode units,
• a positive electrode and a negative electrode face each other at an interface between the electrode units, and the electrode assembly satisfies Formula 1-1:
• 1≦Nn/Pn≦Nn/Pn+1 Formula 1-1:
• where n denotes an integer equal to or greater than 1,
• Nn denotes reversible capacity per unit area of a negative electrode of the nth longest electrode unit,
• Pn denotes reversible capacity per unit area of a positive electrode of the nth longest electrode unit, and
• Pn+1 denotes reversible capacity per unit area of a positive electrode of the (n+1)th longest electrode unit.