Cell Design and Materials: Li-Ion
Page 331 · 35 of 63Sources and links on page 331 (10)
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- https://www.semcorp.com/en/news/company-news/46
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Text on page 331
Technology Trends INDUSTRIALIZED SEPARATOR TECHNOLOGIES Layer
Separator Type
Material
Advantages
Base Layer
Dry-Process Polyolefin
Polypropylene or Polyethylene
Wet-Process Polyolefin
Coating
EMERGING TECHNOLOGIES What
Why
Strength, Lowest cost
Aramid nanofiber composite coatings
Facilitates safety, higher performance than existing ceramic
Polyethylene
Low thickness, electrolyte wetting, low cost vs non-polyolefin options
Flame retardant separator technology
Enhances safety from reduced risk of fire
Nonwoven Fabric
Nonwoven materials made of synthetic fibers: Polyethylene terephthalate (PET), Polyimide (PI)
Porosity, Electrolyte absorption, thermal stability
Solvent-free and water-based PVDF binders
Provides ability to laminate multiple electrode layers together, dimensional stability, safety
Glass Fiber
Often composed of polyethylene or polypropylene with added fillers or ceramic coatings
Thermal Stability, Ionic Conductivity
PVDF coatings with solvent-free and/or PFAS-free processes
Eliminates of potentially harmful chemicals from process
Ceramic Coatings
Alumina, boehmite, silica
Thermal stability, reduced shrink
High-modulus separator designed to withstand Si swelling stress
Allows higher Si content in anode by withstanding swelling stresses
Adhesive Coatings
Poly(vinylidene difluoride) (PVDF), optionally modified (PVDF-HFP)
Adhesion, electrolyte wetting, chemical resistance
Non-woven separators for ESS
Claims improved cycle life, safety, electrolyte wetting
Fiber-Reinforced Coatings
Hybrid coatings combining high-strength fibers (e.g., aramid) with polymer binders.
Strength, thermal stability, reduced shrink
Fully-inorganic separator and electrolyte battery
Enables liquid-free solid-state,adds safety and flammability performance
High-temperature Polymers
Aramids, Polyimides, Polymers of Intrinsic Microporosity (PIM)
Thermal stability, strength, ion selectivity
Ion selective polymer separators, polymers of intrinsic microporosity (PIM)
Reduces weight, improves energy density, helps reduce impact of transition metals
Source: Royal Society of Chemistry, Renewable and Sustainable Energy News
Who
Extracted from the PDF; charts and images may read imperfectly.
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