Current Collectors: Thickness 6-20 μm

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

Parameter	Typical range	Notes & selection driver
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

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 15156, IEC 62660, ASTM B479, DIN EN 1652

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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Battery Cell/Module

The fundamental electrochemical unit or assembled group of cells that stores and releases electrical energy within a battery bank.

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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

Typical Suppliers & Equivalents

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

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

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Manufacturers of Current Collectors

Manufacturer profiles associated with Current Collectors.

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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.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Current Collectors