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Overview

VINATech has been committed to pursuing research in the area of carbon materials and development of nano-composite technologies. We have developed efficient solutions for fuel cells and deodorizing filter.

VINATech developed the original technology involving CNF (Carbon Nano Fiber) through independent research projects, in 2002. Subsequent development includes different carbon solutions including activating carbons, controlling the shape, composite and metal impregnated activation.

The application range of VINATech's carbon solutions includes CNF, catalyst support for fuel cells, MEA (Membrane Electrode Assembly), and electrode and filter materials.

In particular, we lead the world in production of catalyst support, catalyst for fuel cell and MEA.

VINATech Carbon Nano Fiber Technologies

Carbon Nano Fiber(CNF) is a fiber-type carbon with a nano-sized(5 - 350 nm) and high crystallinity(d002 : 3.36 - 3.5Å) that is divided into Platelet type, Herringbone type, and Tubular type, according to the array shape of Graphene layers. Platelet type comes in where the graphene layers are arranged vertical to the direction of fibers and Herringbone type involves lamination with a specific inclination. Tubular type fiber is generated in parallel with the direction of other fibers.

VINATech develops Carbon Nano Fiber products with Herringbone type less than 10nm diameter, Platelet type with high crystalline properties(3.38Å or less), and VINATech can control the material properties.

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Type Products Fiber stems(nm) Crystalline property
(d002 : Å)
Diameter of crystals
(Lc002 : nm)
Platelet type PCNF 80~350 3.36 30
Herring bone type PCNF 10~80 3.4~3.5 1~5
Tubular type TCNF 5~50 3.4~3.5 2~5

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Type Microscopic pictures Forming structures Surface Edges
PCNF

Perpendicular to the fiber axis

Diameter : 80~350 nm

d002 : 3.36Å

Lc002 : 30 nm

HCNF

Symmetrically angled to the fiber axis

Diameter : 10~80 nm

d002 : 3.4~3.5Å

Lc002 : 1~5 nm

TCNF

Parallel to the fiber axis hollow

Diameter : 5~50 nm

d002 : 3.4~3.5Å

Lc002 : 2~5 nm

VINATech Carbon Control Technologies

VINATech has a shape controlling technology that boosts the crystalline property through a physical process applied to the CNF surface and by high-temp thermal processing; the process changes the surface property by rearranging the edges. We also have a complex solution which improves the conductivity of electricity, radiation properties, dispensability, and specific surface area by combining the strengths of each component material.

VINATech's CNF is characterized by its excellent corrosion resistance developed through edge arrangement, dispensability secured by modification of surface properties, and great electricity conductivity and radiation effects ensured by complexation.

We have secured CNF fuel materials and can produce any CNF products with properties such as surface adhesion, distance between layers, and ion's interposing between layers optimized to the customer's application requirements.

[ VINATech Carbon Surface Control Technologies ]

[ VINATech Carbon Complexation Technologies ]

[ Carbon Activation Technology : Specific surface area ]

VINATech's patents in carbon materials

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Patent No. Patent Title Year of application
IPC B82B-003/00 10-0483803-0000 Fiber form nano carbon composition formula 2002
PCT/KR2003/002180 US7470418 B2 Ultra-fine Fibrous Carbon And Preparation Method Thereof 2003
PCT/KR2005/004596 US20090004095 A1 Porous Filamentous Nano Carbon And Method Of Forming The Same 2005
10-1774706 Manufacturing method of catalyst support and fuel cell catalyst including the same 2017
US 10,511,029 B2 Method for Manufacturing Catalyst Support and Catalyst for Fuel Cell 2019

Fuel Cell Components

VINATech is the only producer in the world of catalyst support and catalysts for fuel cells and MEA (Membrane Electrode Assembly).All of these products are based on the company's patented CNF materials technology

VINATech supplies catalysts and MEA having an excellent corrosion resisting property. These properties improve the life cycle of fuel cells by using crystalline carbons as a catalyst support.

We produce catalyst support divided into three types based on the corrosion resistance and shape, Two types of catalyst products classified by the catalyst support and two types of MEA products using our catalyst solutions which can be expanded to 300 cm2.

Fuel Cell Overview

Fuel Cell is a device that changes chemical energy to electrical energy and a system that generates energy continuously unless the fuel supply stops. It has the capabilities of both power generator and battery. Fuel Cell uses hydrogen and oxygen as its fuel. It is a clean energy source that discharges only water through a chemical process.

Fuel cell products are classified by the type of their electrolytes. The fuel cell products we are currently developing include PEMFC (Proton Exchange Membrane FC), DMFC (Direct Methanol FC), MCFC (Molten Carbonate FC), and SOFC (Solid Oxide FC).

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Type Electrolytes Operating temperatures(℃) Application areas
Proton Exchange Membrane FC(PEMFC) Proton Exchange Membrane 50~80 Transportation, Fixed type for in-building application
Direct Methanol FC(DMFC) Proton Exchange Membrane 50~80 Portable backup power supply unit for mobile devices
Molten Carbonate FC(MCFC) Molten Carbonate(Li2CO3 + K2CO3) ~650 for the distributed generation Fixed type
Solid Oxide FC(SOFC) Ceramic(ZrO2 / Y2O3) ~1000 for distributed generation in buildings Fixed type

VINATech’s Fuel Cell Catalyst Support

VINATech have developed and produced in-house Catalyst Support and Membrane Electrode Assembly having an excellent corrosion resisting characteristics. VINATech has improved the fuel cell’s life cycle by using crystalline carbon as a catalyst support.

Fuel cells require micro catalyst particles of 2nm to 3nm, to improve their catalytic performance. Small particles cannot be created only with catalysts. Catalysts must be distributed on catalyst support. VINATech’s fuel cell catalyst supports are Carbon Nanofiber or High crystalline carbon-black products which are designed to minimize the shortening of catalysts' life cycle due to corrosion.

  • - Fibrous carbon & spherical : High crystallinity & high surface
  • - High electrical conductivity by high crystallinity
  • - High anti-corrosion
  • - Catalyst on edge : Fibrous carbon
  • - VINATech independently develops and produces carbon supports (US 15/366,440, JP 4819061 )

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Product Name *BET(m2/g) *XRD(d002)(nm) Fe content(ppm) type
VFS-PL0100 60~70 0.336~0.380 <200 Platelet
VFS-HE0150 100~150 0.340~0.345 <200 Herringbone
VFS-SP0450 400~500 0.345~0.450 <100 Carbon black

*1. BET: Specific surface area in accordance with the theories of Brunauer-Emmett-Teller

*2. XRD(d002): X-Ray Diffraction, inter-layer distance generated by diffraction of X-ray

[ Corrosion of carbon at 1.2V or above ]

VINATech's fuel cell catalyst support showed strong corrosion resistance in a carbon corrosion test based on electrochemical analysis. Corrosion resistance analyses per catalyst supports are as follows.

VINATech’s Fuel Cell Catalyst

VINATech’s fuel cell catalysts are made of platinum, forming 2.5 to 3.0nm particles that are characterized by broad reaction areas and excellent corrosion resistance, which is suitable for applications that improve fuel cell’s performance and life cycle.
VINATech’s fuel cell catalyst products proved to be highly resistant to corrosion in a holding test satisfying carbon corrosion conditions. VINATech’s fuel cell catalyst also demonstrated a low decrement of reaction area.

  • - High durability with VINATech’s in-house developed Catalyst Support
  • - High anti-corrosion
  • - High conductivity
  • - Highly stable : Platinum on edge

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Division Pt content (%) ECSA(m2/g) Particle size(nm) Support type
VFC-HE 20~60 30~45 2.5~2.8 Herringbone
VFC-SP 50~60 2.5~3.0 Carbon black

*ECSA : Electrochemical Surface Area

Highly Reliable Catalyst compared with commercial based on DOE Standard
Based on Design of Experiments, Half Cell Catalyst before and after deterioration test of 30,000 cycles

  • Commercial

  • VINATech

AST Protocol

CV sweep profile : 0.6 V (3 s) ↔ 0.95 V (3 s)

30,000 Cycles

  • Division Commercial VINA
    Loss 30k -42.71% -14.54%
  • Division Ref VINA
    Loss 30k -28.18% -17.10%

VINATech’s fuel cell MEA

The characteristics of VINATech’s fuel cell Membrane Electrode Assembly proved to be excellent performance in discharging generated water, applied with our less-than 100nm electrode porosity controlling technology. VINATech MEA is suitable for improving the performance and life cycle of fuel cells.

Since 2002, VINATech started development for catalyst for fuel cell based on carbon technology and then expanded to Membrane Electrode Assembly products. VINATech Fuel Cell Product line-up is from Catalyst Support to Pt Catalyst and Membrane Electrode Assembly. VINATech’s R&D team developed VINATech’s own Membrane Electrode Assembly to be applied with Hydrogen fuel cell. Especially VFM-DM is developed for Direct Methanol Fuel Cell and VMF-PM can be applied with Polymer Electrolyte Membrane Fuel Cell.

  • - High durability with Superior anti-corrosion ability by catalyst support
  • - Customized size and performance for Membrane Electrode Assembly
  • - Low humidity

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Product Performance Application Size Remark
VFM PM 1.5A/cm2 @0.6V, 60℃ Transportation,
Stationary
Customization
Available
CCM
5 layer,
7layer
DM 200mA/cm2 @ 0.45V, 65℃ Potable
Back-up power
CCG
5layer

VINATech Fuel Cell Components Application

VINATech offers combined solutions including fuel cell catalyst support, catalyst and Membrane Electrode Assembly(MEA), optimized to the customer’s application area and specifications. In particular, VINATech offers MEA with customized catalyst support and catalysts according to your applications and requirements.

Low Humidity Condition Test – VINATech MEA vs Commercial

Test Condition

T Cell : 60°C

P Cell : An / Ca = 1 bara / 1bara

Flow : H2 / Air = ×1.5 / ×2.0

RH : An / Ca = 100% / 100%
0% / 50%

Items Before mV @ 250 mA/㎠ mV @ 1,000 mA/㎠ mV @ 1,500 mA/㎠
VINATech 100-100 806 1.4 %↓ 689 3.2 %↓ 628 8.0 %↓
0-50 795 667 578
Commercial 100-100 794 2.1%↓ 667 5.3%↓ 565 13.2%↓
0-50 778 632 496

Acceleration Stress Test (AST) – VINATech MEA vs Commercial

AST Protocol

T Cell : 60°C

P Cell : An / Ca = 1 bar / 1 bar

Flow : H2 / N2 = 200cc / 600cc

RH : An / Ca = 100% / 100% Cycle : 500 mV/s (1.5 – 1.0V)

Deodorizing filter

VINATech develops deodorizing filter based on their active carbon pre-treatment technology and supplies refrigerator deodorizing filter to a major white goods company.

VINATech offers their customised deodorizing filter which is equipped with VINATech’s activated carbon self absorption and metal catalyst impregnation technologies.

The deodorizing filter solution is using activated carbon and activated carbon fiber’s absorption function with pre-treatment technology which is specialized for the carbon absorption material, ensuring the VINATech deodorizing filter solution shows superior performance and long life span.

VINATech MEA products guarantee the very best performance along with the outstanding capability to combine with wide ranging applications even including low humidification environments.

  • Item pore Diameter(nm)
    BLACK Macro-pore > 50
    BLUE Meso-pore 2 - 50
    RED Micro-pore < 2

VINATech's activated carbon filter

VINATech has developed a block-shape refrigerator deodorizing filter which uses activated carbon with high specific surface area. The filter is currently supplied to large Korean enterprises. The filter helps maintain fresh and clean air inside refrigeration units by eliminating major culprits of odor in refrigerators including Methyl Mercaptan, Hydrogen Sulphide, and Trimethylamine. We are also committed to developing filtering solutions to clean the cabin of cars as well as water purifiers and air cleaners, on the basis of our impregnating technology and by using metal catalysts optimized to each type of gas.

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Items Specifications Refrigerator deodorizing filters
Type Carbon-block
Metal catalysts Copper 3 wt%
Binders Polyethylene sphere binder 10 wt%
Specific surface area 600 m2/g or above
Pore Volume 0.28 cc/g or above
Tap density 0.5 g/cc or above
Methyl Mercaptan destruction time 1500 - 2000 min.
Deodorizing efficiency 90%
Intensity of compress 10 kgf/cm2 above

VINATech's deodorizing filters use optimized metal catalyst impregnating technology specialized for gas elimination.
Our filters have proved excellent in their performance compared to other commercial filters of the kind.

[ SEM picture of the surface activated carbon impregnated into Cu metal ]

  • Item pore Diameter(nm)
    BLACK Macro-pore > 50
    BLUE Meso-pore 2 - 50
    RED Micro-pore < 2
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