Editorial Technical Reference

Supercapacitor

This page explains how Supercapacitor is classified within Computer, Electronic and Optical Product Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.

Technical Definition & Core Assembly

A high-capacity electrochemical capacitor that stores energy through ion adsorption, delivering rapid charge/discharge for power backup and peak power applications.

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Product Specifications

Technical details and manufacturing context for Supercapacitor

Definition

Supercapacitors, also known as electric double-layer capacitors (EDLCs), are used in applications requiring high power density, long cycle life, and rapid energy capture/release, such as regenerative braking, UPS systems, and grid stabilization. They are specified by capacitance (F), voltage rating (V), equivalent series resistance (ESR), and energy/power density. Grades differ by electrode material (activated carbon, graphene, carbon nanotubes), electrolyte type (aqueous, organic, ionic liquid), and construction (cylindrical, pouch, module). Higher-grade devices offer lower ESR, higher operating temperature, and longer lifespan.

Working Principle

Supercapacitors store energy electrostatically via ion adsorption at the electrode-electrolyte interface, forming an electric double layer. No chemical reactions occur, enabling extremely fast charge/discharge and virtually unlimited cycle life. The capacitance is proportional to the electrode surface area and dielectric constant of the double layer, with nanoscale pores in carbon electrodes maximizing surface area.

Common Materials

Activated carbon, Graphene, Carbon nanotubes, Organic electrolyte (e.g., acetonitrile, propylene carbonate), Aluminum foil current collectors, Polymer separator (e.g., polypropylene), Aluminum or plastic casing

Technical Parameters

Parameter	Typical range	Notes & selection driver
Capacitance	1–5000 F	Rated capacitance at 25°C, measured at 1 kHz.IEC 62391-1
Rated Voltage	2.5–3.0 V	Maximum continuous DC voltage.IEC 62391-1
ESR (Equivalent Series Resistance)	0.5–50 mΩ	Measured at 1 kHz, affects power delivery efficiency.IEC 62391-1
Operating Temperature Range	-40 to +70 °C	Extended range up to 85°C for some grades.IEC 62391-1
Cycle Life	500,000–1,000,000 cycles	To 80% initial capacitance at rated voltage and 25°C.IEC 62391-1
Capacitance Tolerance	-10 to +30 %	Typical tolerance for EDLCs.IEC 62391-1
Leakage Current	0.5–5 mA	After 72h at rated voltage, 25°C.IEC 62391-1
Energy Density	5–10 Wh/kg	Gravimetric energy density for commercial cells.
Power Density	10,000–15,000 W/kg	Gravimetric power density, discharge to half rated voltage.
Self-Discharge Rate	5–20 %/day	Voltage drop per day at 25°C, varies with temperature.
Dimensions (Cylindrical)	8×20 to 35×60 mm	Diameter × height, typical cell sizes.
Termination Type	Radial, axial, screw, or tab	Depends on cell construction and application.
RoHS Compliance	Yes	Lead-free and hazardous substance free.EU Directive 2011/65/EU
Certification	UL, CE, RoHS	Typical certifications for market access.UL 810A, CE, RoHS

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Supercapacitor.

Published Manufacturer Relationships

Source-reviewed profile relationships currently associated with Supercapacitor

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Data Basis

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