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Condensateur à charbon super actif

Buy Super Capacitor Activated Carbon

Activated carbon (AC) is the most used electrode material in commercial Electric Double-Layer Capacitors (EDLCs), which are the most widely used supercapacitors. AC serves an important function:
 
High Surface Area: AC has a truly high specific surface area with an enormous surface where electrostatic charges can be stored at the electrode-electrolyte interface (EDLC).
Charge storage: AC physically adsorbs the electrolyte ions to its enormous internal surface to store charge without any chemical reaction.
 
Power delivery: The porous structure allows for rapid ion adsorption/desorption, providing very high power density and very fast charge/discharge rates.
 
Stability & Long Life: The electrostatic charge storage mechanism, and the innate stability of carbon, can give excellent cycle life and reliability.
 
Conductivity: While it requires conductive additives, AC can provide a conductive carbon framework for electron transport.
 
The capacity of AC is based on the ability to easily tune its pore structure (ion accessibility) and surface chemistry. In summary, AC delivers the central supercapacitor benefits of high power, long cycle life, and wide operating temperature limits. It is a critical component for applications requiring short bursts of rapid energy or continuous cycling.
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Industry Challenges for Activated Carbon in Supercapacitors

Activated carbon (AC) has several distinct challenges when used in supercapacitors:

Limites de la densité énergétique

  • AC offers terrific power density and long cycle life but has an inevitable disadvantage in storing less energy per unit volume/weight than battery technologies. Therefore, increasing energy density without diminishing power or lifetime constraint is indeed challenging.

Consistency & Sourcing

  • Achieving reproducibility in AC properties throughout a large batch (surface area, pore structure distribution) from precursor materials that are derived from nature can be quite difficult. Deviations in batch variations will affect the predictability of the voltage response and cannot be assumed the same.

Electrode Processing and Fabrication

  • The complexity of integrating high-surface-area AC powders into structurally robust and conductive electrodes with acceptable accessibility of enough electrolyte, involves complex slurry processing and coating techniques. It is also difficult to ensure sufficient adhesion in an electrode with a large thickness, as well as avoiding cracking.

Performance Compromises

  • Often, optimizing pore size for maximal ion movement (power), conflicts with maximizing surface area in order to maximize charge storage (energy). Striking a compromise between the two competing designs for specific applications is not a trivial exercise.

Environmental & Processing Implications

  • When producing high-performance AC, the synthesis often involves energy-intensive processes or use of environmental contaminants. Managing waste streams from AC production processes, and developing true sustainable, scalable production routes from waste products are significant ongoing implications.

Recyclability

  • Recovering and reusing AC out of end-of-life supercapacitors is complicated by logistical and technical challenges.

types de charbon actif apparentés

颗粒活性炭（granular activated carbon）

Charbon actif en grains (CAG)

  • Valeur en iode : 600-1200
  • Taille des mailles : 1×4/4×8/8×16/8×30/12×40/20×40/20×50/30×60/40×70 (autres tailles sur demande)
  • Densité apparente : 400-700
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Charbon actif à piliers

Charbon actif en pastilles

  • Valeur de l'iode : 500-1300
  • Taille des mailles : 0,9-1mm/1,5-2mm/3-4mm/6mm/8mm(autres tailles sur demande)
  • Densité apparente : 450-600
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粉末活性炭（Poudre de charbon actif）

Charbon actif en poudre

  • Valeur de l'iode : 500-1300
  • Maillage : 150/200/300/350 (autres dimensions sur demande)
  • Densité apparente : 450 - 550
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蜂窝活性炭（Charbon actif en nid d'abeille）

Charbon actif en nid d'abeille

  • Valeur en iode : 400-800
  • Taille des mailles : 100×100×100mm/100×100×50mm (densité cellulaire personnalisée sur demande)
  • Densité apparente : 350-450
  • Diamètre de l'alésage：1.5-8mm
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Charbon actif en coquille de noix de coco

  • Indice d'iode : 700-1200 mg/g
  • Surface : 700-1200 m²/g
  • Densité apparente : 320-550 kg/m³
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Charbon actif en coque de noix

  • Indice d'iode : 700-1200 mg/g
  • Surface : 700-1200 m²/g
  • Densité apparente : 320-550 kg/m³
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Charbon actif à base de charbon

Charbon actif à base de charbon

  • Indice d'iode : 700-1200 mg/g
  • Surface : 700-1200 m²/g
  • Densité apparente : 300-650 kg/m³
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Charbon actif à base de bois

  • Indice d'iode : 700-1200 mg/g
  • Surface : 700-1200 m²/g
  • Densité apparente : 320-550 kg/m³
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Carbone physiquement activé

  • Méthode d'activation : Activation par vapeur/gaz à haute température
  • Structure des pores : Dominée par les micropores, distribution uniforme des pores
  • Profil environnemental : Sans produits chimiques, faible teneur en cendres
  • Applications principales : Adsorption en phase gazeuse, purification de l'eau potable
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Carbone activé chimiquement

  • Méthode d'activation : Activation chimique (par exemple, H₃PO₄/ZnCl₂) à des températures modérées.
  • Structure des pores : Riche en mésopores, surface plus élevée
  • Efficacité du processus : Temps d'activation plus court, rendement plus élevé 30-50%
  • Post-traitement : Lavage à l'acide nécessaire pour éliminer les résidus
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Charbon actif imprégné

  • Fonctionnalisation : Chargé d'agents actifs (par exemple, I₂/Ag/KOH)
  • Adsorption ciblée : Amélioration de la capture de polluants spécifiques (par exemple, Hg⁰/H₂S/gaz acides).
  • Personnalisation : Optimisation chimique pour les contaminants ciblés
  • Applications principales : Traitement des gaz industriels, protection CBRN
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Pourquoi utiliser notre charbon actif

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Exceptional Material Consistency:

Our stringent manufacturing controls guarantee the uniformity of surface area, pore size distribution, and particle morphology from batch-to-batch. As a result, we offer predictable electrode performance, and easier integration into existing manufacturing systems.

Enhanced Electrochemical Performance:

Our engineered dual hierarchical porosity (micro-meso-macro pores) maximize the ion-accessible surface area while supporting fast ion diffusion, providing our electrodes with very high power density and energy density.

Improved Long-Term Stability:

By using advanced surface purification, we minimize the unstable oxygen functional groups and metallic impurities on our surface to minimize gas evolution during cycling, thus improving device lifetime, and operational safety.

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Customized Application Solutions:

Our surface chemistry and pore structures can be tuned and customized for specific electrolyte compatibility and to target performance measures (e.g., high power vs. high energy focus).

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Sustainable and Scalable Copying Supply:

We use reliable precursors and optimized activation conditions to ensure our practice is environmentally responsible and offers reliable quality at scale and reasonable costs.

Processus et technologie

1. Primary Electrode Material in EDLC Supercapacitors

Activated carbon (AC) serves as the foundational electrode material in commercial Electrical Double-Layer Capacitors (EDLCs), leveraging its porous structure for electrostatic charge storage.

Aperçu de la solution

Upon AC electrodes, charge is stored physically due to the mechanism of ion adsorption at the electrode/electrolyte interface. AC electrodes have high surface area and tunable pore subnetworks (micro/mesopores) which could help with the number of accessible ions as well as the overall charge storage capacity.

Principaux avantages

  • High surface area enables massive charge storage capacity through double-layer formation.
  • Rapid ion adsorption/desorption supports ultrafast charge/discharge cycles and high power density.
  • Physical charge storage ensures exceptional cycling stability and longevity.
  • Broad operating temperature range suits diverse environmental conditions.

2. Biomass-Derived Sustainable Electrodes

Agricultural waste (e.g., banana peels, coconut shells, pine needles) is converted into high-performance AC, aligning with circular economy principles.
 

Aperçu de la solution

Biomass precursors undergo carbonization and chemical activation (e.g., KOH, self-activation) to produce AC with tailored pore hierarchies and heteroatom doping (O, N). This enhances conductivity and pseudocapacitance.

Principaux avantages

  • Waste valorization reduces environmental impact and raw material costs.
  • Self-doped heteroatoms (e.g., N/O from biomass) improve wettability and introduce pseudocapacitance.
  • Hierarchical pores (macro/meso/micropores) facilitate ion buffering and rapid diffusion.
  • Lower activation temperatures in some methods reduce energy consumption.

3. Composite Electrodes with Transition Metal Hydroxides

Hybrid electrodes combine AC with transition metal hydroxides (e.g., Ni(OH)₂, Co(OH)₂) to synergize EDLC and pseudocapacitive storage.

Aperçu de la solution

AC acts as a conductive scaffold for metal hydroxides, mitigating their poor conductivity and stacking issues. The composite leverages both double-layer capacitance (AC) and reversible faradaic reactions (hydroxides).

Principaux avantages

  • Energy density boost via combined charge storage mechanisms.
  • Enhanced conductivity from the AC framework enables efficient electron transport.
  • Suppressed electrode stacking exposes more active sites for redox reactions.
  • Improved cycle life due to structural stability from AC support.

4. Post-Filling for High Volumetric Performance

Low density of porous AC limits volumetric energy density. Post-filling strategies address this by densifying pore structures.

Aperçu de la solution

Macro/mesopores in AC are filled with carbonizable agents (e.g., tannic acid), followed by carbonization. This increases density while preserving microporous charge storage sites.

Principaux avantages

  • Higher electrode density elevates volumetric capacity without sacrificing porosity.
  • Retained rate capability ensures performance under high current loads.
  • Optimized pore utilization balances ion diffusion and charge storage.

5. Surface Functional Group Engineering for Gas Suppression

Unstable oxygen functional groups on AC cause gas evolution (e.g., O₂) during cycling, leading to supercapacitor swelling.

Aperçu de la solution

High-temperature treatment removes surface groups (e.g., carboxyl, quinone). Mixed-acid purification further reduces impurities (e.g., Fe), minimizing gas generation.

Principaux avantages

  • Reduced gas evolution extends device lifespan and safety.
  • Higher purity lowers internal resistance and improves conductivity.
  • Stabilized electrochemical interface enhances cycling reliability.

Blog connexe

Le rôle du charbon actif dans les supercondensateurs
Le rôle du charbon actif dans les supercondensateurs
Super Capacitor activated carbon boosts energy storage, fast charging, and long cycle life, making supercapacitors...
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