Electric Double Layer Capacitors (EDLC), Supercapacitors

Image Part Number Description / PDF Quantity Rfq
JJL0E268MSEGBB

JJL0E268MSEGBB

Nichicon

CAP 2600F 20% 2.5V CHASSIS MOUNT

0

357DCN2R7M

357DCN2R7M

Cornell Dubilier Electronics

CAP 350F 20% 2.7V T/H

0

BZ129A224ZABA3

BZ129A224ZABA3

Elco (AVX)

BESTCAP

0

TPL-60/18X40F

TPL-60/18X40F

Tecate Group

CAP 60F -10% +20% 2.7V T/H

11

SKELCAP SCA3200

SKELCAP SCA3200

Skeleton Technologies

SKELCAP ULTRACAPACITOR 3200F 2.8

8

MAL223531013E3

MAL223531013E3

Vishay BC Components/Beyshlag/Draloric

CAP ALUM 10F 3V 1000H

0

MAL222551004E3

MAL222551004E3

Vishay BC Components/Beyshlag/Draloric

CAP ALUM 25F 2.7V 2000H

0

MAL222591007E3

MAL222591007E3

Vishay BC Components/Beyshlag/Draloric

CAP 30F -20% +50% 2.7V T/H

0

SCCV40E606MRB

SCCV40E606MRB

Elco (AVX)

SUPERCAP CYLINDRICAL

600

BZ15CA223ZSB

BZ15CA223ZSB

Elco (AVX)

BESTCAP

0

M0510-2R5204-R

M0510-2R5204-R

PowerStor (Eaton)

CAP 200MF -20% +80% 2.5V T/H

62

LP12352R7206

LP12352R7206

TAIYO YUDEN

SUPERCAPACITOR 20F 2.7V

300

SM0006-170-NB

SM0006-170-NB

LICAP Technologies

6F, 180V, NO BALANCE

0

BZ05FB6828NBDD

BZ05FB6828NBDD

Elco (AVX)

BESTCAP

0

SCAP,PBL-1.65/5.4

SCAP,PBL-1.65/5.4

Tecate Group

CAP 1.65F 5.4V T/H UCAP PACK

0

CPM3225A

CPM3225A

Seiko Instruments, Inc.

DOUBLE LAYER ELECTRIC CAPACITOR,

0

KR-5R5C224-R

KR-5R5C224-R

PowerStor (Eaton)

CAP 220MF -20% +80% 5.5V T/H

236

SCAP,PBLS-2.0/13.5

SCAP,PBLS-2.0/13.5

Tecate Group

CAP 2F -10% +20% 13.5V UCAP PACK

179

BZ05FB642KNBDV

BZ05FB642KNBDV

Elco (AVX)

BESTCAP

0

JJC0E566MELB

JJC0E566MELB

Nichicon

CAP 56F 20% 2.5V T/H

0

Electric Double Layer Capacitors (EDLC), Supercapacitors

1. Overview

Electric Double Layer Capacitors (EDLC), commonly referred to as supercapacitors, are electrochemical energy storage devices that bridge the gap between conventional capacitors and batteries. They store energy through electrostatic charge separation at the electrode-electrolyte interface, offering high power density, rapid charge/discharge cycles, and exceptional cycle life (up to 1 million cycles). Their importance in modern technology lies in enabling energy-efficient systems for applications requiring burst power, energy recovery, and backup power solutions.

2. Main Types and Functional Classification

Type Functional Features Application Examples
EDLC (Carbon-based) High power density, long cycle life, low energy density Regenerative braking systems, UPS
Pseudocapacitors Higher energy density via redox reactions, moderate cycle life Portable electronics, grid energy storage
Hybrid Supercapacitors Combines EDLC and battery materials for balanced energy/power density Electric vehicles, renewable energy systems

3. Structure and Composition

A typical supercapacitor consists of two activated carbon electrodes separated by a porous membrane, immersed in an electrolyte (aqueous, organic, or ionic liquid). The electrodes are coated on current collectors (usually aluminum foil), and the entire assembly is enclosed in a hermetically sealed metal or polymer casing. Advanced designs incorporate graphene or carbon nanotubes to enhance surface area and conductivity.

4. Key Technical Specifications

Parameter Description & Importance
Capacitance (F) Determines charge storage capacity (range: 1 F to 5000 F)
Rated Voltage (V) Limits operational voltage (2.5 V 3.0 V per cell)
Equivalent Series Resistance (ESR) Affects power delivery efficiency (low ESR enables high pulse currents)
Energy Density (Wh/kg) Typical range: 5 50 Wh/kg
Power Density (kW/kg) Typical range: 1 10 kW/kg
Cycle Life Exceeds 100,000 cycles with minimal degradation

5. Application Fields

  • Consumer Electronics: Smart meters, LED flashlights
  • Automotive: Start-stop systems, kinetic energy recovery systems (KERS)
  • Industrial: Robotics, backup power for PLCs
  • Renewable Energy: Solar/wind energy storage, grid frequency regulation
  • Transportation: Trams, buses, and hybrid vehicles

6. Leading Manufacturers and Representative Products

Manufacturer Product Series Key Specifications
Maxwell Technologies (Tesla) BoostCap BC Series 10 F 3400 F, 2.7 V, ESR < 0.5 m
Panasonic Gold Capacitor Series 5 F 1000 F, 3.0 V, 10-year lifespan
Skeleton Technologies SkelCap Series 1200 F 5000 F, 2.85 V, 40 kW/kg power density
Samsung SDI
Supercapacitor Modules 50 F 2000 F, automotive-grade durability

7. Selection Recommendations

Key considerations include:

  • Application Requirements: Prioritize power density for pulse applications or energy density for long-duration backup
  • Voltage Matching: Use cell-balancing circuits for multi-cell stacks
  • Operating Environment: Select electrolytes suitable for temperature extremes (e.g., ionic liquids for -40 C to 85 C)
  • Lifetime Cost: Evaluate cycle life versus initial cost (e.g., EDLCs outlast batteries in cycling applications)

 

Industry Trends and Future Outlook

Emerging trends include:

  • Development of graphene-based electrodes to double energy density
  • Integration with IoT devices for smart energy management
  • Growth in automotive applications driven by EV and 48V micro-hybrid systems
  • Adoption of aqueous electrolytes for safer, low-cost energy storage
  • Hybrid supercapacitor-battery systems for renewable energy grids

The global supercapacitor market is projected to grow at 20% CAGR (2023 2030), driven by demand in transportation and renewable energy sectors.

 

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