How does supercapacitor energy density compare to batteries?

Supercapacitors: 1–15 Wh/kg. Li-ion batteries: 150–250 Wh/kg. Supercapacitors have 10–100x lower energy density but 10–100x higher power density (1,000–10,000 W/kg) for instantaneous high-power bursts.

What is the cycle life of a supercapacitor?

Supercapacitors tolerate 500,000–1,000,000+ charge/discharge cycles with minimal degradation. Li-ion batteries: 500–2,000 cycles. This makes supercapacitors ideal for high-cycling applications.

Are hybrid supercapacitor-battery systems used commercially?

Yes — hybrid systems combine supercapacitors for peak power demands with batteries for energy storage. Used in regenerative braking systems, grid frequency regulation, and EV fast charging buffers.

Supercapacitor vs Battery Energy Density Calculator

Compare supercapacitor (EDLC) and lithium-ion battery energy density, power density, cycle life, and total cost of ownership for high-power applications.

2D stress state at a point. All stresses in MPa.

σx — Normal Stress X (MPa)

σy — Normal Stress Y (MPa)

τxy — Shear Stress (MPa)

⚙ Mechanical Note: Results are based on standard textbook formulas and ISO/AASHTO references. Always verify critical designs with applicable codes (ISO 898, AASHTO 1993, AISC, Eurocode 3) and a qualified engineer.

How to Use

Enter the values for the patient or scenario you are assessing. Compare supercapacitor (EDLC) and lithium-ion battery energy density, power density, cycle life, and total cost of ownership for high-power applications. Use the supercapacitor vs battery result to inform your clinical assessment.

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