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.

Product Specifications

Technical details and manufacturing context for Supercapacitor

Definition
Supercapacitors, also known as electric double-layer capacitors (EDLCs), are energy storage components used in applications requiring high power density, long cycle life, and rapid energy capture/release. Typical uses include regenerative braking, uninterruptible power supplies (UPS), 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. For procurement, verify model-specific values against the manufacturer's datasheet and relevant standards such as IEC 62391-1. The directory provides reference ranges; actual performance must be confirmed with the legal manufacturer or supplier.
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
ParameterTypical rangeNotes & selection driver
Capacitance1–5000 FRated capacitance at 25°C, measured at 1 kHz.IEC 62391-1
Rated Voltage2.5–3.0 VMaximum continuous DC voltage.IEC 62391-1
ESR (Equivalent Series Resistance)0.5–50 mΩMeasured at 1 kHz, affects power delivery efficiency.IEC 62391-1
Operating Temperature Range-40 to +70 °CExtended range up to 85°C for some grades.IEC 62391-1
Cycle Life500,000–1,000,000 cyclesTo 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 Current0.5–5 mAAfter 72h at rated voltage, 25°C.IEC 62391-1
Energy Density5–10 Wh/kgGravimetric energy density for commercial cells.
Power Density10,000–15,000 W/kgGravimetric power density, discharge to half rated voltage.
Self-Discharge Rate5–20 %/dayVoltage drop per day at 25°C, varies with temperature.
Dimensions (Cylindrical)8×20 to 35×60 mmDiameter × height, typical cell sizes.
Termination TypeRadial, axial, screw, or tabDepends on cell construction and application.
RoHS ComplianceYesLead-free and hazardous substance free.EU Directive 2011/65/EU
CertificationUL, CE, RoHSTypical 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.

Components / BOM
  • Carbon Electrodes
    Nanoporous electrodes whose surface area sets the capacitance.
  • Electrolyte
    Supplies the ions that adsorb at the electrode interface.
Technical documentation
Request current drawings, revision history, and a signed specification sheet.
Manufacturing capability
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Inspection readiness
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Supplier transparency
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Manufacturers of Supercapacitor

8 companies list this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

Nantong Jianghai Capacitor Co., Ltd.
Nantong, Jiangsu, CN
Founded 1958
Stated by the company · profile compiled by CNFX from public sources
EDATEC
Shanghai, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “Supercapacitor Safe Shutdown Issue”
View source page ↗ edatec.cn · checked 2026-09-02
Kintek Solution
Zhengzhou, Henan, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “Supercapacitor Equipment”
View source page ↗ kinteksolution.com · checked 2026-09-07
Shenzhen Meirui Zhida Technology Co., Ltd.
Shenzhen, Guangdong, CN
Also makes: Drying Oven
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “Supercapacitor Machine”
View source page ↗ szmrbest.com · checked 2026-09-05
TG-EP
Shenzhen, Guangdong, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “Supercapacitor UPS Learn More”
View source page ↗ tg-ep.com · checked 2026-08-22
UF Capacitors Factory Co., LTD
Dongguan, Guangdong, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “Supercapacitor”
View source page ↗ ufcapacitors.com · checked 2026-09-04
Xiamen Tmax Battery Equipments Limited
Xiamen, Fujian, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “Supercapacitor Lab Plant”
View source page ↗ tmaxcn.com · checked 2026-09-10
XIAMEN TOB NEW ENERGY TECHNOLOGY CO., LTD.
Xiamen, Fujian, CN
Listed on the company's own website · profile compiled by CNFX from public sources
Listed there as: “Supercapacitor Materials”
View source page ↗ tobmachine.com · checked 2026-09-04

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Frequently Asked Questions

What are the typical capacitance and voltage ranges for supercapacitors?

According to the directory, capacitance ranges from 1 to 5000 F, and rated voltage from 2.5 to 3.0 V. These are reference ranges; actual values depend on the specific model and must be confirmed with the manufacturer.

What standards apply to supercapacitors?

Relevant standards include IEC 62391-1, IEC 62576, GB/T 34870-2017, and UL 810A. These are procurement references; compliance must be verified with the supplier.

What is the typical cycle life of a supercapacitor?

The directory lists a cycle life of 500,000 to 1,000,000 cycles to 80% initial capacitance at rated voltage and 25°C. This is a reference range; actual endurance depends on operating conditions.

How should I select a supercapacitor for my application?

Consider required capacitance, voltage, ESR, energy/power density, operating temperature, and cycle life. Also evaluate construction type and termination. Always verify model-specific parameters with the manufacturer.

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Supercapacitor.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

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