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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.
Specification
  • Ultra-Thin 4㎛
  • High Strength 70kgf/㎟
  • High Elongation 12%
Ultra-thin + High strength
+ High elongation Hybrid Elecfoil Products
Leading the Future of Secondary
Batteries with Customer-Customized
Innovative Technology

Ultra-thin + High strength + High elongation

Hybrid Elecfoil Products

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

Product

We are the only company in the industry that possesses hybrid copper foil products that simultaneously satisfy Ultra-thin, High-strength, and High-elongation
requirements, and we prioritize the production of customer-customized products.

* Based on a thickness of 8㎛ for tensile strength and elongation

Classification High strength High elongation Hybrid High-End
L2S ST5 ST6 L2H L2SH ST5H ST6H
Room
temperature		 Tensile
strength		 kgf/mm² 40~49 50~59 60~69 30~38 40~49 50~59 60~69
Elongation % ≥8 ≥7 ≥4 ≥12 ≥11 ≥10 ≥6
High
temperature		 Tensile
strength		 kgf/mm² 37~45 45~55 ≥50 27~35 37~45 45~55 ≥50
Elongation % ≥8 ≥7 ≥4 ≥13 ≥11 ≥10 ≥6
Product thickness ≥4µm ≥4µm ≥5µm ≥5µm ≥4µm ≥4µm ≥5µm
Classification L2B
Product thickness ㎛ 8㎛
Room
temperature		 Tensile
strength		 kgf/mm² 30~38
Elongation % ≥6
High
temperature		 Tensile
strength		 kgf/mm² 27~35
Elongation % ≥7
Classification for Solid-state batteries
LDN
Structure Ni plated Cu foil
Elecfoil-
thickness		 ㎛

8~10
Ni-thickness ㎛

0.1~1.0
Tensile
strength		 kgf/㎟

40~55
Features
  • • Maintains stable performance even in high-temperature environments due to excellent heat resistance.
  • • Minimizes reactions with electrolytes due to the corrosion resistance of the Ni plating layer.
  • • Offers competitive pricing through electroplating production compared to SUS and Ni foil.
Please swipe the screen left or right to check.

* Based on a thickness of 8㎛ for tensile strength and elongation

Classification High strength High elongation Hybrid High-End
L2S ST5 ST6 L2H L2SH ST5H ST6H
Room
temperature		 Tensile
strength		 kgf/mm² 40~49 50~59 60~69 30~38 40~49 50~59 60~69
Elongation % ≥8 ≥7 ≥4 ≥12 ≥11 ≥10 ≥6
High
temperature		 Tensile
strength		 kgf/mm² 37~45 45~55 ≥50 27~35 37~45 45~55 ≥50
Elongation % ≥8 ≥7 ≥4 ≥13 ≥11 ≥10 ≥6
Product thickness ≥4µm ≥4µm ≥5µm ≥5µm ≥4µm ≥4µm ≥5µm
Classification L2B
Product thickness ㎛ 8㎛
Room
temperature		 Tensile
strength		 kgf/mm² 30~38
Elongation % ≥6
High
temperature		 Tensile
strength		 kgf/mm² 27~35
Elongation % ≥7
Please swipe the screen left or right to check.
Classification for Solid-state batteries
LDN
Structure Ni plated Cu foil
Elecfoil-
thickness		 ㎛

8~10
Ni-thickness ㎛

0.1~1.0
Tensile
strength		 kgf/㎟

40~55
Features
  • • Maintains stable performance even in high-temperature environments due to excellent heat resistance.
  • • Minimizes reactions with electrolytes due to the corrosion resistance of the Ni plating layer.
  • • Offers competitive pricing through electroplating production compared to SUS and Ni foil.