Electric Double Layer Capacitors (EDLC), Supercapacitors

Part Number	Description / PDF	Quantity
257DER2R5SDP Cornell Dubilier Electronics	CAP 250F -20% +50% 2.5V T/H	0
EDC474Z5R5H Cornell Dubilier Electronics	CAP 470MF -20% +80% 5.5V T/H	3633500
EDC105Z5R5H Cornell Dubilier Electronics	CAP 1F -20% +80% 5.5V T/H	0
VPF127M3R8 Cornell Dubilier Electronics	CAP EDLC LITH 3.8V 120F 12.5X25	400400
305DER2R5SFU Cornell Dubilier Electronics	CAP 3F -20% +50% 2.5V T/H	0
EDLNF474B5R5C Cornell Dubilier Electronics	CAP 470MF 5.5V T/H	9
DGH305Q2R7 Cornell Dubilier Electronics	CAPACITOR 3F -10% +30% 2.7V TH	17348
DSF506Q3R0 Cornell Dubilier Electronics	50F 3.0V 18*40	249
EDC224Z5R5H Cornell Dubilier Electronics	CAP 220MF -20% +80% 5.5V T/H	6884000
207DER2R5SDH Cornell Dubilier Electronics	CAP 200F -20% +50% 2.5V T/H	0
155DCN5R5M Cornell Dubilier Electronics	CAP 1.5F 20% 5.5V T/H	0
506DCN2R7Q Cornell Dubilier Electronics	CAP 50F -10%, +30% 2.7V T/H	2714
106DCN2R7M Cornell Dubilier Electronics	CAP 10F 20% 2.7V T/H	22045800
DGH355Q5R5 Cornell Dubilier Electronics	CAPACITOR 3.5F -10% +30% 5.5V TH	735
305DCN2R7Q Cornell Dubilier Electronics	CAP 3F -10% +30% 2.7V T/H	0
105DER2R5SFN Cornell Dubilier Electronics	CAP 1F -20%, +50% 2.5V T/H	0
357DER2R5SEZ Cornell Dubilier Electronics	CAP 350F -20% +50% 2.5V T/H	0
DGH155Q5R5 Cornell Dubilier Electronics	CAPACITOR 1.5F -10% +30% 5.5V TH	3712
DSF117Q3R0 Cornell Dubilier Electronics	110F 3.0V 10*60	177800
205DER2R5SFQ Cornell Dubilier Electronics	CAP 2F -20% +50% 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.