Product Information
  1. Corporate Profile
  2. Product Information
    1. Foil Products
      1. Applications
      2. Each product (Electrical machinery and apparatus)
        1. TOYAL-CARBO®
        3. TOYAL PASS®
        4. E-FOIL
        5. Ranafoil™
        6. Etching circuit foil
        7. Precision etched circuit products "CUME®"
      3. Each product (Foodstuffs, pharmaceuticals and industrial materials)
        1. TOYAL LOTUS®
        2. Toyal Dry™
        3. READ-MAX®
        4. Child resistant PTP - Child Proof™
        5. Hairline
        6. Alnoble®ZR
        7. Vacuum insulation materials
      4. Production bases
        1. Yao Works
        2. Kanbara Works
        3. Chiba Works
        4. Gunma Plant
        5. Chigasaki Plant
        6. Shonan Yabata Plant
    2. Powder Products
      1. Each product
        1. Aluminium alloy powder
        2. Aluminium nitride
        3. Aluminium powder for fillers
        4. High-purity spherical aluminium powder
        5. Brazing paste (Brazing filler metal pastes)
      2. Production bases
        1. Hino Works
    3. Paste Products
      1. Each application
        1. Automobiles
        2. Household electrical products and digital appliances
        3. Printing inks (Packaging materials, containers, cloth, etc.)
        4. Construction, machinery and heavy-duty anticorrosion
        5. Heat resistance and thermal insulation
        6. Powders and PCM (Pre-coated metal)
        7. Cosmetics
        8. Resins and films
        9. Electronics products
      2. Each product
        1. Leafing Alpaste®
        2. Non-leafing Alpaste®
        3. High-gloss Alpaste®
        4. TD Series (for printing inks)
        5. Resin coated Alpaste®
        6. Alpaste® for water based coating
        7. Colored Alpaste® "FRIEND COLOR"
        8. Interference color aluminium pigment "CHROMASHINE®"
        9. Interference color aluminium pigment "Cosmicolor®"
        10. Aluminium flakes for powder coating
        11. Stainless steel flakes
        12. Metallic compounds "METAX®"
        13. Aluminium thermal conductive filler
        14. Aluminium electrically conductive filler for firing
        15. Metal coated electrically conductive filler
        16. Dummy balls
      3. Catalog [PDF]
      4. Core competencies
        1. Flaking technologies (Shape control, fine powder pulverization)
        2. Surface treatment technologies
        3. Powder plating technologies
        4. Hybrid technologies
        5. Solvent substitution technologies
        6. Blending technologies
      5. Production bases
        1. Shinjo Works
      6. Troubleshooting Guide
        1. For Better Use Of ALPASTE
        2. For Safe Use Of ALPASTE
        3. Problems Resulted From ALPASTE In The Paint System (1)
        4. Problems Resulted From ALPASTE In The Paint System (2)
        5. Recommendation To Treated Type
    4. Solar Cell Related Products
      1. Each product
        1. Toyal Solar®
        2. ALSOLAR®
      2. Production bases
        1. Yao Works
        2. Hino Works
  3. Financial Information
  4. Environmental measures
  5. Research & Development
  6. Toyal Technical Report
  7. Group Company


The goals of development

The development of high output capacitors for EVs and current collectors for batteries

"TOYAL-CARBO®" is composite material for electrodes that has carbon particles attached to the surface of the aluminium foil without any binders. It is produced by applying Toyo Aluminium's unique technologies for creating whiskers. Through the development of this material, we are aiming to extend our business into the field of electrode materials, where high capacitance and low resistance are required.


Aluminium has conventionally been used on electrode current collectors for lithium ion secondary batteries and capacitors due to its corrosion resistance, electrical conductivity, workability, light weight, and low cost. In particular, there are expectations for the selection of this high capacitance and low resistance electrode material in order to realize capacitors and secondary lithium ion batteries for EVs and HEVs, where high outputs are required.


When aluminium foil is used as the current collector on electrodes for batteries and capacitors, an oxide film is essential to improve the corrosion resistance of the electrode plates. However, oxide films have the disadvantage that they block the flow of electric currents. In order to improve electrical conductivity, it is general practice to attach carbon to the electrode plates using binders (a type of adhesive). However, these binders not only increase the resistance of the electrode plates, they can also cause problems if they are used in high temperature ranges.
TOYAL-CARBO® uses whiskers instead of binders to bond carbon to the aluminium foil, so low resistance is achieved in all environments.

Features The whiskers generated on the surface of the aluminium foil measure about 20 to 30 nm in diameter and are composed of aluminium carbide (Al4C3). These nanoscale whiskers serve as binders to bond carbon to the surface of the aluminium foil.


Electrodes and current collectors for capacitors and secondary lithium-ion batteries for EVs and HEVs
Electrodes for functional solid polymer capacitors
Electrodes for aluminium electrolytic capacitors

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