Battery cell with a tabless electrode

A method of preparing a rolled electrode, comprising:

• providing an electrode layer comprising an active material disposed over a foil;
• forming a series of flags in the foil to form a flagged electrode;
• winding the flagged electrode to form an electrode roll comprising a series of rolled flags;
• and
• folding the rolled flags to form folded rolled flags, wherein each flag of the folded flags is directed into a substantially interleaved configuration.

A method of preparing a rolled electrode, comprising:

• providing an electrode layer comprising an active material disposed over a foil;
• forming a series of flags in the foil to form a flagged electrode;
• folding the flags to produce a folded flagged electrode comprising a series of folded flags;
• and
• winding the folded flagged electrode to form an electrode roll, wherein as the folded flags are wound each flag of the folded flags is directed into a substantially interleaved configuration.

An interleaved flagged electrode, comprising:

• a wound flagged electrode layer comprising an active material disposed over a foil;
• wherein the foil comprises a series of flags;
• and
• wherein each of the series of flags are folded and in a substantially interleaved configuration.