INDUSTRY COMPONENT

Current Collectors

Current collectors are conductive components in batteries that collect and distribute electrical current between electrodes and external circuits.

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Component Specifications

Definition
Current collectors are essential components in electrochemical cells, particularly in batteries and fuel cells, that serve as conductive substrates for electrode materials. They facilitate the collection and distribution of electrical current generated during electrochemical reactions, ensuring efficient electron transfer between active materials and external terminals. Typically made from highly conductive metals or alloys, they must exhibit excellent electrical conductivity, corrosion resistance, and mechanical stability under operating conditions.
Working Principle
Current collectors operate on the principle of electrical conduction, providing a low-resistance path for electrons to flow between electrode active materials and external circuits. During battery operation, they collect electrons from the anode during discharge and distribute them to the cathode during charging, maintaining uniform current density across electrode surfaces to prevent localized heating and degradation.
Materials
Aluminum foil (cathode side, 10-20μm thickness), Copper foil (anode side, 6-12μm thickness), Nickel foam or mesh (for specific applications), Aluminum alloys with corrosion-resistant coatings, Carbon-coated metals for enhanced performance
Technical Parameters
  • Purity >99.5% for aluminum, >99.9% for copper
  • Thickness 6-20 μm
  • Tensile Strength 150-300 MPa
  • Surface Roughness Ra 0.1-0.5 μm
  • Electrical Conductivity >58 MS/m for copper, >35 MS/m for aluminum
Standards
ISO 15156, IEC 62660, ASTM B479, DIN EN 1652

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Current Collectors.

current collector battery component electrode assembly aluminum foil current collector copper foil battery conductive substrate electrochemical cell Current Collectors Current Collectors in Electrical Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Electrode Assembly

A critical component within a solid-state cell module that facilitates electrochemical reactions by providing conductive pathways for electron and ion transfer.

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Engineering Analysis

Risks & Mitigation
  • Corrosion in electrolyte environments
  • Delamination from electrode materials
  • Mechanical fatigue from cycling
  • Increased internal resistance from oxidation
FMEA Triads
Trigger: Electrolyte contamination or moisture ingress
Failure: Corrosion and increased resistance
Mitigation: Apply protective coatings, maintain dry assembly environments, use corrosion-resistant alloys
Trigger: Poor adhesion between collector and active material
Failure: Delamination and capacity fade
Mitigation: Optimize surface treatments, use appropriate binders, implement quality control for coating processes

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
±2% thickness variation, ±0.5mm width tolerance
Test Method
Four-point probe for conductivity, SEM for surface analysis, peel strength testing for adhesion, corrosion testing per ASTM G31

Buyer Feedback

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Frequently Asked Questions

Why are different metals used for anode and cathode current collectors?

Aluminum is used for cathodes because it forms a protective oxide layer that prevents corrosion in high-voltage environments, while copper is used for anodes because it remains stable at lower potentials and doesn't form lithium alloys that could degrade performance.

How does current collector thickness affect battery performance?

Thinner collectors reduce battery weight and volume, improving energy density, but must maintain sufficient mechanical strength and conductivity. Optimal thickness balances these factors for specific applications.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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