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PRIONE

ENG
KOR

BEST VALUE INNOVATION

Materials
Organic-Inorganic Composite Separator

Hybrid Membrane

  • Limitations of Conventional
    NASICON Separator

    Low Mechanical Stability

    Limited Electrochemical Performance

    → Next-generation separator technology required
  • Performance Improvement Points
    Thickness reduced to about 80%

    Improved Flexibility

    Reduced Stack Resistance

    → Improved Cell Efficiency
  • Key Technology Elements

    Maintains Na⁺ selectivity during charging

    Higher performance than conventional
    with improved stability

  • Technical Significance

    Overcomes the structural and performance limits of the 1st-generation separator

    Na⁺ selectivity + stability

    Improved productivity and applicability to
    next-generation seawater batteries

1st-generation seawater battery

2nd-generation seawater battery

Hybrid Membrane

  • 80% thickness reduction versus conventional separators
  • Reduced resistance and homogeneity across the electrode-catalyst junction
  • Minimized interfacial resistance
  • Separator Durability

    Brittle
    Low durability

    Flexible
    Various shapes

  • Mass Production of Cells

    Brittle
    Continuous process not possible

    Flexible
    Continuous process possible
    (Roll to Roll)

  • Applicability to various cell structures

    Brittle
    Fixed shape

    Flexible
    Various shapes

  • Poor bonding with pouch or case

    Ceramic material
    Low adhesion to pouch

    Polymer material
    High adhesion to pouch

Development of proprietary organic-inorganic composite separator technology that blocks water transport within the cathode while enabling selective Na⁺ transport

Hybrid Membrane

  • Minimizes the sodium-ion pathway through MEA integration
  • Lowers cell resistance while enhancing performance and stability
  • Roll to Roll adoption enables continuous, rapid product manufacturing
  • Constant pressure maintains uniform thickness, ensuring stable performance

MEA & Cell Structure

Double-side electrode structure

High energy density achieved using a double-side electrode structure

Adhesion and sealing structure between pouch film and separator

PRIONE's proprietary adhesion and sealing structure that blocks moisture penetration

PBA Surface Technology

SURFACE MODIFICATION OF PRUSSIAN BLUE ANALOGUE (PBA) NANOPARTICLES

Na⁺ selectivity and ionic conductivity are controlled through the porous lattice structure and surface modification of PBA.

PBA Surface Technology

NASICON + Porous Cathode

NASICON Porous Cathode

PBA Membrane + Porous Cathode

PBA Membrane Porous Cathode

  • Selective Na⁺ Transport
  • Fast Ion Path
  • Low Interfacial Resistance

Performance Comparison

  • High specific surface area delivers strong
    power characteristics, suited to ESS

  • High capacity and cycle-life stability
    provide outstanding power efficiency

  • Capacity retention at high current density and
    excellent stability enable use across
    a wide range of applications

  • Compared with the Hard Carbon used in 1st-generation seawater batteries
  • The developed PRIONE anode material addresses the shortcomings of the Hard Carbon used in 1st-generation seawater batteries (low power characteristics and capacity)
  • Replacing the NASICON separator used in 1st-generation seawater batteries with the polymer separator under development delivers high ionic conductivity while reinforcing the physical strength that becomes an issue during mass production