초록 ▼

An electrochemical cell comprising an electrode assembly in which overlayed electrodes are wound together in a bi-directional fashion yielding a high energy density cell stack with low internal impedance is described. The overlayed electrodes are such that either a single cathode is paired with two

An electrochemical cell comprising an electrode assembly in which overlayed electrodes are wound together in a bi-directional fashion yielding a high energy density cell stack with low internal impedance is described. The overlayed electrodes are such that either a single cathode is paired with two anodes or a single anode is paired with two cathodes prior to winding of the cell stack assembly. For example, the electrode assembly is formed by overlapping the two anode electrodes on opposite sides of the cathode electrode across a midportion and then winding the electrode strips bi-directionally about the midportion.

대표청구항 ▼

1. An electrode assembly, comprising:a) a first electrode strip having a midportion and a predetermined first length; b) at least two second electrode strips having a second length shorter than the first length, wherein the at least two second electrode strips are disposed on opposite sides of the f

1. An electrode assembly, comprising:a) a first electrode strip having a midportion and a predetermined first length; b) at least two second electrode strips having a second length shorter than the first length, wherein the at least two second electrode strips are disposed on opposite sides of the first electrode strip and in an overlapping fashion along the midportion of the first electrode strip, and c) a separator material disposed between the first electrode strip and the at least two second electrode strips, wherein the first electrode strip and the at least two second electrode strips bi-directionally foldable about the midportion of the first electrode strip such that a wound cell stack is formed.