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Separators & Current Collectors

ATOMFAIR® High-Performance Current Collectors and Separators: Designed for liquid, semi-solid, and all-solid-state batteries, our solutions span from traditional electrolytic copper/aluminum foils to functional coated/composite foils and next-generation 3D carbon nanotube networks. Leveraging precision electrodeposition, interface engineering, and nanoparticle tuning, we deliver thicknesses from 3μm to 105μm and tensile strengths from 200MPa to >900MPa to suppress dendrites, improve Coulombic efficiency >99.8%, reduce thermal runaway risk by 90%, and boost energy density by 5–10%.

Show Specification Data

I. CURRENT COLLECTOR SPECIFICATIONS MATRIX

Category Product Series Specifications Range Core Advantages
Copper Foil Lithium Battery Copper Foil (Electrolytic) 3–12μm (Thinnest 99.8% Low areal density deviation (<1g/m²), Single roll length ≤40,000m; Options for double-sided glossy/matte, high elongation, high tensile, micro-porous, high corrosion resistance.
Electronic Circuit Copper Foil 9–105μm, Tensile Strength ≥206MPa, Peel Strength 0.5–2.85kg/cm Ra 0.38–0.43μm, Rz 5.5–15μm; Capable of producing RTF, HVLP, and embedded resistor copper foil.
Ultra-Thin Copper Foil Down to 3μm, Controllable Tensile Strength 300–800MPa Extremely thin profile with precisely controllable mechanical strength thresholds.
Al & Ni Foil Battery Aluminum Foil 7–20μm, Width 200–1700mm, Tensile Strength 190–260MPa, Elongation 1.5–4% Available in multiple grades: Standard strength, Medium-strength high-elongation, High-strength high-elongation, and Ultra-thin.
Nickel Foil Tensile Strength >1000MPa, Ultra-thin design architecture High mechanical strength boundaries paired with exceptional high-temperature resilience.
Carbon Coated / Composite Carbon-Coated Aluminum Foil (Multi-Scenario) Aluminum foil base: 9–20μm, Coating thickness: 0.5–1μm, Areal density: 0.4–0.7g/m², Dyne value ≥56 Reduces contact resistance by 30–50%; Options for acid/alkali/solvent/water resistance, Graphene coating, or Carbon Nanotube (CNT) coating.
Composite Foil (Copper / Aluminum) Copper-based: PET/PI + Copper Plating + Carbon Coating;
Aluminum-based: Vapor-deposited Aluminum		 Copper-based: Reductions in structural specific gravity by 1/2–2/3, localized puncture insulation; Aluminum-based: Significantly thinner and lighter profiles.
Functional Coating Current Collector Copper foil base: 6–8μm, Coating thickness: 0.5–1μm, Areal density: 0.4–0.6g/m²; Nanoparticle regulation tracking Suppresses lithium/sodium dendrite propagation, elevates Coulombic efficiency to >99.8%; Integrates ZnO/SnO₂ nucleation seed layers.
Solid-State Dedicated Dry-Process Electrode Adhesive-Coated Foil Aluminum foil base: 22±2μm, Single-sided density: 2.5±0.3g/m², Tensile Strength >130kg/cm Exclusively optimized for solvent-free dry electrode processes; decreases structural matrix porosity while maximizing volumetric energy density.
CNTp-3D Current Collector Porosity ≥93%, Micron-scale pore sizing, Areal density ≤2g/m², Lithium storage capacity 30 Ah/g, Sodium storage capacity 20 Ah/g Three-dimensional carbon nanotube network architecture delivering ultra-high electrical and thermal conductivity; provides 3D spatial confinement to actively suppress dendrite growth.

II. BATTERY SEPARATOR SPECIFICATIONS MATRIX

ATOMFAIR® provides a comprehensive array of separator solutions covering liquid, semi-solid, and all-solid-state battery configurations. Leveraging industrial-grade coating and film production lines, we support precision customization with controlled thicknesses from 2 to 70 μm and porosities from 30% to 70% to achieve high-temperature resilience (≤180°C), superior bonding strength, and exceptional ionic conductivity.

Substrate / Material Covered Product Types Primary Applications Core Characteristics (Thickness & Key Performance Metrics)
PE Wet-process base membranes, dry-process separators, ceramic coatings, polymer coatings, hybrid coatings, high-wettability coatings, nanofiber coatings, solid-state electrolyte coatings, ultra-high temperature resistant functional membranes, ultra-high porosity ion membranes (CW series), etc. High energy density, fast charging, high power, energy storage, power batteries, solid-state/semi-solid-state batteries, filtration, fresh air systems. Thickness 2–70μm, porosity 30–70%, air permeability (Gurley) 15–500 s/100mL, puncture resistance 100–2700gf, tensile strength 500–22200 kgf/cm², thermal shrinkage ≤1–5%. Can be coated with multiple functional layers (Al₂O₃/PVDF/PMMA/COF/LLZTO, etc.), heat resistance 150–180°C, bonding strength 2–7N/m, compressibility >50%.
PI Nanofiber chopped fibers, nanofiber framework membranes. Solid-state electrolyte toughening, micro-cracking mitigation. Fiber diameter 0.5–1.5μm, aspect ratio >200, mechanical strength >0.5GPa, modulus >5GPa, membrane porosity 70–90%, temperature resistance >500°C, ultra-lightweight features.
Substrate-Free PVDF+LLZTO/COF composite solid-state electrolyte membranes. Self-supporting solid-state batteries. Thickness 5–40μm, tensile threshold >10MPa, elongation at break >50%, ionic conductivity >0.5mS/cm, electrochemical stability window up to 4.5V.

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