Rechargeable battery

A rechargeable battery, comprising:

• a first electrode, a second electrode, a separator, and electrolyte, wherein the first electrode, the second electrode, and the separator are planar structures, and the separator is sandwiched between the first electrode and the second electrode;
• the first electrode comprising a first supercapacitor electrode, a first battery electrode, a first current collector, and a first connector, wherein the first supercapacitor electrode, the first battery electrode, and the first current collector are planar structures, the first battery electrode is sandwiched between the first supercapacitor electrode and the first current collector, the first supercapacitor electrode comprises a first surface and a second surface opposite to the first surface, and the second surface is adjacent to and parallel with the first battery electrode;
• the first current collector comprises a third surface and a fourth surface opposite to the third surface, and the third surface is adjacent to and parallel with the first battery electrode;
• the first supercapacitor electrode is adjacent to the separator, and the first supercapacitor electrode and the first current collector are electrically connected via the first connector, the first connector is in direct contact with at least one part of the first surface that is parallel with the first battery electrode;
• and
• the second electrode comprising a second supercapacitor electrode, and a second battery electrode, wherein the second supercapacitor electrode and the first battery electrode are planar structures, and the second supercapacitor electrode is adjacent to the separator.