Electric Double Layer Capacitors (EDLC), Supercapacitors

Image Part Number Description / PDF Quantity Rfq
SCCY85B607SLBLE

SCCY85B607SLBLE

Elco (AVX)

CAP 600F -10% +30% 2.7V CHAS MT

0

SCCT47B406SRB

SCCT47B406SRB

Elco (AVX)

SUPERCAP CYLINDRICAL

0

SCCU30B356SRB

SCCU30B356SRB

Elco (AVX)

CAP 35F -10% +30% 2.7V T/H

197

BZ155B473ZSBA2

BZ155B473ZSBA2

Elco (AVX)

BESTCAP

0

SCMS22F255PRBA0

SCMS22F255PRBA0

Elco (AVX)

CAP 2.5F 0% +100% 5.5V T/H

1994

SCCW45B107SSB

SCCW45B107SSB

Elco (AVX)

CAPACITOR 100F -10% +30% 2.7V TH

89

BZ015A104ZSB

BZ015A104ZSB

Elco (AVX)

CAP 100MF -20% +80% 5.5V SMD

505

BZ015A104ZSBDZ

BZ015A104ZSBDZ

Elco (AVX)

BESTCAP

0

SCMS22D255PRBB0

SCMS22D255PRBB0

Elco (AVX)

CAP 2.5F 0% +100% 5.4V T/H

0

SCCU30E356SRB

SCCU30E356SRB

Elco (AVX)

CAP 35F -10% +30% 3V T/H

600

SCCT35B226SRB

SCCT35B226SRB

Elco (AVX)

SUPERCAP CYLINDRICAL

960

SCMR14L334SRBB0

SCMR14L334SRBB0

Elco (AVX)

CAP 330MF -10% +30% 9V T/H

0

SCMT22F505PRBA0

SCMT22F505PRBA0

Elco (AVX)

CAP 5F 0% +100% 5.5V T/H

868

SCMR22H155PRBB0

SCMR22H155PRBB0

Elco (AVX)

CAP 1.5F 0% +100% 6V T/H

1732

SCCQ12E105PRB

SCCQ12E105PRB

Elco (AVX)

CAPACITOR 1F 0% +100% 3V T/H

3016

SCMT22C505PRBA0

SCMT22C505PRBA0

Elco (AVX)

CAP 5F 0% +100% 5V T/H

638

BZ12GA124ZABA2

BZ12GA124ZABA2

Elco (AVX)

BESTCAP

0

BZ115B104ZABA3

BZ115B104ZABA3

Elco (AVX)

BESTCAP

0

BZ01CB153ZSB

BZ01CB153ZSB

Elco (AVX)

CAP 15MF -20% +80% 12V SMD

309

SCMR18J604SRBB0

SCMR18J604SRBB0

Elco (AVX)

CAP 600MF -10% +30% 8.1V T/H

1380

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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