Clad foil-free bipolar solid-state battery cell

A bipolar battery cell comprising:

• a first cathode electrode comprising a cathode active material layer arranged on a cathode current collector;
• a first separator arranged adjacent to the first cathode electrode;
• N units, arranged adjacent to the first separator, comprising:
• a first anode/bipolar current collector comprising an aluminum foil layer, wherein a first side of the aluminum foil layer includes lithium-aluminum alloy and a second side includes unreacted aluminum;
• a cathode active material layer arranged adjacent to the first anode/bipolar current collector;
• and
• a second separator including a first side arranged adjacent to the cathode active material layer;
• and
• a second anode/bipolar current collector arranged adjacent to a last one of the N units,
• wherein N is an integer greater than zero.

A bipolar battery cell comprising:

• a first cathode electrode comprising a cathode active material layer arranged on a cathode current collector;
• N units, arranged adjacent to the first cathode electrode, comprising:
• a first separator arranged adjacent to the first cathode electrode;
• a first anode/bipolar current collector comprising an aluminum foil layer, wherein a first side of the aluminum foil layer is arranged adjacent to the first separator and includes lithium-aluminum alloy and a second side includes unreacted aluminum;
• and
• a cathode active material layer arranged adjacent to the second side of the first anode/bipolar current collector;
• a second separator including a first side arranged adjacent to the cathode active material layer of a last one of the N units;
• and
• a second anode/bipolar current collector arranged adjacent to the second separator,
• wherein N is an integer greater than zero.