Electric Double Layer Capacitors (EDLC), Supercapacitors

Image Part Number Description / PDF Quantity Rfq
BZ15FB153ZNB

BZ15FB153ZNB

Elco (AVX)

BESTCAP

0

SCMR22J105SRBA0

SCMR22J105SRBA0

Elco (AVX)

CAP 1F -10% +30% 8.1V T/H

1610

SCCY68B407SSB

SCCY68B407SSB

Elco (AVX)

CAPACITOR 400F -10% +30% 2.7V TH

182

BZ01KB682ZSB

BZ01KB682ZSB

Elco (AVX)

BESTCAP

0

SCCS30B106PRBLE

SCCS30B106PRBLE

Elco (AVX)

SUPERCAP CYLINDRICAL

0

BZ154B473ZSB

BZ154B473ZSB

Elco (AVX)

BESTCAP

0

SCMR18G604SRBA0

SCMR18G604SRBA0

Elco (AVX)

CAP 600MF -10% +30% 7.5V T/H

681

SCCY71B407SLBLE

SCCY71B407SLBLE

Elco (AVX)

CAP 400F -10% +30% 2.7V CHAS MT

0

BZ013A703ZSB

BZ013A703ZSB

Elco (AVX)

CAP 70MF -20% +80% 3.6V SMD

91

BZ055B153ZSB

BZ055B153ZSB

Elco (AVX)

CAP 15MF -20% +80% 5.5V SMD

1550400

SCMR18H105PSBB0

SCMR18H105PSBB0

Elco (AVX)

CAP 1F 0% +100% 6V T/H

2281620

BZ019B223ZSB

BZ019B223ZSB

Elco (AVX)

CAP 22MF -20% +80% 9V SMD

233

BZ015B603ZAB

BZ015B603ZAB

Elco (AVX)

CAPACITOR 60MF -20% +80% 5.5V TH

519

BZ023A284ZAB

BZ023A284ZAB

Elco (AVX)

CAP 280MF -20% +80% 3.6V T/H

0

SCCT20E106SRB

SCCT20E106SRB

Elco (AVX)

CAPACITOR 10F -10% +30% 3V T/H

1258

BZ014B333ZSB

BZ014B333ZSB

Elco (AVX)

CAP 33MF -20% +80% 4.5V SMD

665

BZ013B503ZSBBJ

BZ013B503ZSBBJ

Elco (AVX)

BESTCAP

0

BZ055B333ZSBA1

BZ055B333ZSBA1

Elco (AVX)

BESTCAP

0

SCCZ1EB308SCB

SCCZ1EB308SCB

Elco (AVX)

CAP 3000F -10% +30% 2.7V CHAS MT

31120

BZ01GB682ZSB

BZ01GB682ZSB

Elco (AVX)

BESTCAP

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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