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Elecfoil High-End
Elecfoil for Secondary Battery
Elecfoil(Electrodeposited copper foil) for secondary battery is an essential component utilized as the anode current collector
in lithium-ion battery, which are integral to electric vehicle (EV) battery technology. LOTTE ENERGY MATERIALS is at the forefront
of innovation and production, focusing on High-End Elecfoil engineered to meet the stringent demands for increased strength and elongation.
These properties are crucial for enhancing the driving range, ensuring the safety of charge-discharge cycles, and boosting the energy density of EVs. Also, we are pioneering the industry with unique combination of ultra-thinness, high strength, and high elongation properties and a portfolio of patents.
Elecfoil(Electrodeposited copper foil) for secondary battery is an essential component utilized as the anode current collector in lithium-ion battery, which are integral to electric vehicle (EV) battery technology.
LOTTE ENERGY MATERIALS is at the forefront of innovation and production, focusing on High-End Elecfoil engineered to meet the stringent demands for increased strength and elongation.
These properties are crucial for enhancing the driving range, ensuring the safety of charge-discharge cycles, and boosting the energy density of EVs.
Also, we are pioneering the industry with unique combination of ultra-thinness, high strength, and high elongation properties and a portfolio of patents.
Grade Spec
Grade Thickness Strength Elongation Product classification Product characteristics
High-End
Product
6㎛ or less Ultra-thin
Elecfoil
50~60 kgf/㎟ High
strength
12~15 % High
elongation
For the tech leading market · Choosing suppliers considering various
  non-price attributes such as high quality and
  supply reliability
· LEM boasts a super gap technology that sets
  us apart from other Elecfoil manufacturers,
  enabling us to meet the needs of High-End
  markets effectively
Universal
Product
8~16㎛ 30~40 kgf/㎟ 8~8.5% For the cost player market · Cost competitiveness prioritized
  (intense market competition and decreasing
  profitability).
· LEM is actively pursuing innovation to enhance
  cost competitiveness and concentrating on
  rapid transition towards High-End product
  offerings
High-End Product
Thickness 6㎛ or less Ultra-thin Elecfoil
Strength 50~60 kgf/㎟ High strength
Elongation 12~15 % High elongation
Product classification
Product characteristics
For the tech leading market · Choosing suppliers considering various non-price attributes such as high quality and supply reliability
· For LEM, we possess super gap technology among Elecfoil companies that can respond to High-End demand.
Universal Product
Thickness 8~16
Strength 30~40 kgf/㎟
Elongation 8~8.5 %
Product classification
Product characteristics
For the cost player market · Cost competitiveness prioritized (intense market competition and decreasing profitability)
· LEM is actively pursuing innovation to enhance cost competitiveness and concentrating on rapid transition towards High-End product offerings

Ultra-thin + High strength + High elongation

Hybrid Elecfoil Products

Establishment of Technological Entry Barriers
by Holding Patents for Hybrid Elecfoil Products

Ultra-high strength Elecfoil : ISS-T7
Product Features

Boasts ultra-high strength properties that are maintained both at room temperature and under high-temperature conditions. Additionally, it resists deformation even when subjected to the substantial loading of anode active materials required for high-capacity battery and anticipated in next-generation battery.

  • Ultra-high strength characteristics
  • Improving battery manufacturability
  • Improving battery processability
  • Cost reduction for customers
Thickness 6~12
Ultra-high strength Elecfoil : ISS-T6
Product Features

Boasts ultra-high strength properties that are maintained both at room temperature and under high-temperature conditions. Additionally, it resists deformation even when subjected to the substantial loading of anode active materials required for high-capacity battery and anticipated in next-generation battery.

  • Ultra-high strength characteristics
  • Improving battery manufacturability
  • Improving battery processability
  • Cost reduction for customers
Thickness 6~12
High-strength Elecfoil : ISS
Product Features

Features high strength and high heat resistance, ensuring superior manufacturability during battery production. Deformation after charge and discharge cycles is prevented, making it ideal for use in high-capacity battery

  • High tensile strength characteristics at room temperature
  • Improving battery manufacturability
  • Maintaining high strength characteristics after thermal history
  • Improving battery processability
  • Cost reduction for customers
Thickness 4~12
Medium strength Elecfoil : I2S
Product Features

Features high strength and high heat resistance, ensuring superior manufacturability during battery production. Deformation after charge and discharge cycles is prevented, making it ideal for use in high-capacity battery

  • Medium strength and medium elongation characteristics at room temperature
  • Improving battery manufacturability
  • Maintaining medium strength and medium elongation characteristics after thermal history
  • Improving battery processability
  • Cost reduction for customers
Thickness 4~12
Universal Elecfoil : I2B
Product Features

Currently most widely used Elecfoil in lithium-ion battery. Both sides(Shiny and Matt side) exhibit similar level of low surface roughness

  • Secured high-speed mass production technology
  • Secured wide-width and long-length technology
Thickness 6~20
Medium strength high elongation Elecfoil : I2S-H
Product Features

It is a Elecfoil with high elongation while having the same tensile strength at room and high temperatures as I2S, a medium-strength Elecfoil.
It can improve processability when manufacturing battery with increased energy density.

  • Medium strength and high elongation characteristics at room temperature
  • Improving battery processability
  • Maintaining medium strength and high elongation characteristics after thermal history
  • Improving battery stability
Thickness 4~12
High elongation Elecfoil: I2H
Product Features

Boasts high elongation properties while maintaining the same tensile strength at room temperature as I2B, the universal Elecfoil. Minimizes the risk of Elecfoil rupture during the battery's charge and discharge cycles

  • High elongation characteristics at room temperature
  • Improving battery processability
  • Suppressing Elecfoil rupture
  • Improving battery stability
Thickness 6~20
Ultra-thin copper ISS/I2S
Product Features

Designed for ultra-thin battery, with a thickness of 5㎛ or less. High strength properties of I2S and ISS are incorporated to enhance the battery's capacity and output. Development history
· World's first development of Elecfoil in 2015(I2S)
· Customer approval and mass production of 5 ㎛ I2S in 2018

  • Medium strength and medium elongation characteristics at room temperature
  • High-quality production of High-End ultra-thin Elecfoil
  • Improving battery energy density
Thickness 4~5
Ultra-high strength Elecfoil : ISS-T7
Product Features

IBoasts ultra-high strength properties that are maintained both at room temperature and under high-temperature conditions. Additionally, it resists deformation even when subjected to the substantial loading of anode active materials required for high-capacity battery and anticipated in next-generation battery.

  • Ultra-high strength characteristics
  • Improving battery manufacturability
  • Improving battery processability
  • Cost reduction for customers
Thickness 6~12
Ultra-high strength Elecfoil : ISS-T6
Product Features

Boasts ultra-high strength properties that are maintained both at room temperature and under high-temperature conditions. Additionally, it resists deformation even when subjected to the substantial loading of anode active materials required for high-capacity battery and anticipated in next-generation battery.

  • Ultra-high strength characteristics
  • Improving battery manufacturability
  • Improving battery processability
  • Cost reduction for customers
Thickness 6~12
High-strength Elecfoil : ISS
Product Features

Features high strength and high heat resistance, ensuring superior manufacturability during battery production. Deformation after charge and discharge cycles is prevented, making it ideal for use in high-capacity battery

  • High tensile strength characteristics at room temperature
  • Improving battery manufacturability
  • Maintaining high strength characteristics after thermal history
  • Improving battery processability
  • Cost reduction for customers
Thickness 4~12
Medium strength Elecfoil : I2S
Product Features

Features high strength and high heat resistance, ensuring superior manufacturability during battery production. Deformation after charge and discharge cycles is prevented, making it ideal for use in high-capacity battery

  • Medium strength and medium elongation characteristics at room temperature
  • Improving battery manufacturability
  • Maintaining medium strength and medium elongation characteristics after thermal history
  • Improving battery processability
  • Cost reduction for customers
Thickness 4~12
Universal Elecfoil : I2B
Product Features

Currently most widely used Elecfoil in lithium-ion battery. Both sides(Shiny and Matt side) exhibit similar level of low surface roughness

  • Secured high-speed mass production technology
  • Secured wide-width and long-length technology
Thickness 6~20
Medium strength high elongation Elecfoil : I2S-H
Product Features

It is a Elecfoil with high elongation while having the same tensile strength at room and high temperatures as I2S, a medium-strength Elecfoil.
It can improve processability when manufacturing battery with increased energy density.

  • Medium strength and high elongation characteristics at room temperature
  • Improving battery processability
  • Maintaining medium strength and high elongation characteristics after thermal history
  • Improving battery stability
Thickness 4~12
High elongation Elecfoil : I2H
Product Features

Boasts high elongation properties while maintaining the same tensile strength at room temperature as I2B, the universal Elecfoil. Minimizes the risk of Elecfoil rupture during the battery's charge and discharge cycles

  • High elongation characteristics at room temperature
  • Improving battery processability
  • Suppressing Elecfoil rupture
  • Improving battery stability
Thickness 6~20
Ultra-thin copper ISS/I2S
Product Features

Designed for ultra-thin battery, with a thickness of 5㎛ or less. High strength properties of I2S and ISS are incorporated to enhance the battery's capacity and output. Development history
· World's first development of Elecfoil in 2015(I2S)
· Customer approval and mass production of 5 ㎛ I2S in 2018

  • Medium strength and medium elongation characteristics at room temperature
  • High-quality production of High-End ultra-thin Elecfoil
  • Improving battery energy density
Thickness 4~5
Electric car
Energy storage system
  • 01. Dissolution Create purified copper sulfate solution after dissolving high-purity copper wire and filtering
  • 02. Making Elecfoil Produce high-purity Elecfoil for battery by applying current to the electrolyte, electrodepositing copper on the drum surface
  • 03. Sorting Cut Elecfoil according to the customer's needs, and then package them after quality inspection
  • 01. Dissolution Create purified copper sulfate solution after dissolving high-purity copper wire and filtering
  • 02. Making Elecfoil Produce high-purity Elecfoil for battery by applying current to the electrolyte, electrodepositing copper on the drum surface
  • 03. Sorting Cut Elecfoil according to the customer's needs, and then package them after quality inspection