What SK IE Technology does

SK IE Technology Co., Ltd. (KOSPI: SKIET) is a South Korean specialty materials company that was spun off from SK Innovation Co., Ltd. on April 1, 2019, with SK Innovation retaining 53.35% ownership. Headquartered in Jongno-gu, Seoul, the company manufactures two principal product families. The first is lithium-ion battery separators — base-film LiBS produced via proprietary sequential biaxial stretching (the company was the first worldwide to implement this process in 2007) and CCS, a water-based ceramic-coated variant that improves thermal stability and electrolyte wettability for lithium-ion cells. The second is FCW (Flexible Cover Window), a transparent polyimide film with functional hard coating designed to replace glass cover windows in foldable smartphones, flexible OLED devices, and automotive displays, produced at a 300,000㎡ commercial plant that has been operating since April 2020.

SK IE Technology operates a three-country manufacturing footprint: a domestic LiBS/CCS plant in Jeungpyeong, South Korea; a wholly-owned subsidiary (SK hi-tech battery materials Jiangsu Co., Ltd.) in Changzhou, China; and a wholly-owned subsidiary (SK hi-tech battery materials Poland sp. z o.o.) in Dąbrowa Górnicza, Poland, the latter supported by a $300 million green loan from the International Finance Corporation. The company supplies separators to lithium-ion battery manufacturers serving IT devices (smartphones, laptops, tablets, power tools), electric vehicles (hybrid, plug-in, full EV), and energy storage systems (ESS), as well as FCW to foldable display panel manufacturers. Distribution is direct B2B enterprise sales with no third-party channel intermediaries, and customer qualification is gated by IATF 16949:2016 and ISO 9001:2015 certifications from Lloyd's Register.

Revenue is generated almost entirely through hardware sales of these physical separator and display-window products. Reported consolidated K-IFRS revenue was ₩2,619 hundred million KRW in 2025 (approximately $190M USD), ₩2,179 hundred million in 2024, and ₩6,496 hundred million in 2023, with the 2024 contraction tied to the broader EV demand slowdown that also triggered restructuring and layoffs across SK Group's battery affiliates. Total assets stood at ₩43,919 hundred million KRW in 2025 with equity of ₩26,014 hundred million KRW. The company is led by CEO Lee Sang Min (appointed March 2025) and governed by a six-person board comprising one executive director, one non-executive director, and four independent directors.

Name

SK IE Technology

Legal name

SK ie technology Co., Ltd.

Website

https://eng.skietechnology.com

Company type

Public

Founded year

2019

Operating status

Operating

Headcount range

101–250 employees

Short description

SK IE Technology is a South Korean specialty materials manufacturer spun off from SK Innovation, producing lithium-ion battery separators (LiBS and water-based ceramic-coated CCS) and Flexible Cover Window films for foldable displays, supplying global battery and display panel makers via direct B2B enterprise sales from plants in Korea, China, and Poland.

Ownership category

akta.pro rank

Product category

Battery Separators and Display Materials

NAICS

Battery Manufacturing (33591), Battery Manufacturing (335910)

SIC

Electronic & Other Electrical Equipment (No Computer Equip) (3600)

akta.pro primary industry

Battery Cells (Li-ion, LFP, Sodium-ion, Lead-acid, NiMH) (IMAGAHAA)

akta.pro secondary industries

Battery Modules & Packs (Industrial/Commercial pack assembly) (IMAGAHAB), Battery Pack & Module Manufacturing (EV) (IMACACAA), Battery Pack Manufacturing & Module Assembly (EUAFABAI)

Keywords

• Battery separator materials
• Lithium-ion separators
• Ceramic coated separators
• Flexible display films
• Battery materials manufacturing

Headquarters

HQ city

Seoul

HQ country

South Korea

HQ region

Asia

Offices4 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Operations, Infrastructure, Technology or R&D, Personnel, Marketing or Sales

Revenue model

1. LiBS (Lithium-ion Battery Separator) Sales: SK ie technology generates revenue from the manufacture and sale of lithium-ion battery separators (Base Film LiBS and Ceramic Coated Separators) to battery manufacturers for IT devices (smartphones, laptops, tablets), electric vehicles (hybrid, plug-in, EV), and energy storage systems (ESS, smart-grid, emergency power). Revenue figures show ₩2,619 billion in 2025 and ₩2,179 billion in 2024 (consolidated K-IFRS).
2. FCW (Flexible Cover Window) Sales: Revenue from the sale of Flexible Cover Window materials — transparent PI film with hard coating — to display panel manufacturers for use in foldable smartphones, flexible OLED devices, and automotive displays. FCW commercial plant of 300,000 ㎡ has been operational since April 2020.
3. Corporate Disclosures (DART Filings): The company files quarterly, semi-annual, and annual disclosures with Korean regulators. Recent filings include capital increases of SK hi-tech battery materials Poland sp. z o.o., short-term borrowing increases, and equity transactions — indicating active financing and subsidiary investment activity.

Go-to-market motion1 record

Distribution channels2 records

Marketing channels4 records

Core offering

SK IE Technology manufactures and sells lithium-ion battery separators (LiBS base film and CCS ceramic-coated variants) used in EV, IT device, and energy storage system batteries, as well as FCW (Flexible Cover Window) transparent polyimide films with functional hard coating for foldable and flexible displays. The company produces these materials at scale across manufacturing plants in South Korea, China, and Poland and sells them directly to enterprise battery and display manufacturers.

Product overview

SK IE Technology operates as a materials specialist offering two main product lines: battery materials (LiBS and CCS separators for lithium-ion batteries used in EVs and IT devices) and display materials (FCW for foldable displays). LiBS and CCS are complementary separator technologies where CCS adds ceramic coating to the base LiBS film for enhanced thermal performance. FCW represents the company's entry into the foldable display market, providing transparent PI film with hard coating as a glass replacement.

Differentiator

Problem solved

Functional benefit

Products and services

• LiBS (Lithium-ion Battery Separator)
• CCS (Ceramic Coated Separator)
• FCW (Flexible Cover Window)

Quantifiable outcome

• 17 LiBS/CCS production lines operating as of March 2021
• +2 more outcomes

Named customers4 records

Segments2 records

Ideal customer profiles2 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Scale indicators7 records

Recent moves7 records

Expansion highlights5 records

Direct peers

• SEMCORP (formerly Senior Technology): China's largest battery separator manufacturer with massive production capacity for both base film and ceramic-coated separators. Direct global competitor to SKIET in EV battery separators with significant cost advantages.
• Toray Industries: Japanese materials company producing battery separators under the Setela brand, competing in the wet-process separator market. Comparable technology portfolio in advanced films for batteries and displays.
• UBE Corporation: Japanese chemical company manufacturing polyolefin separators for lithium-ion batteries with global production footprint. Direct competitor in separator films used for EV and consumer electronics batteries.
• W-SCOPE: Korean-Japanese battery separator manufacturer specializing in ceramic-coated polyethylene separators for EVs. Direct competitor with similar product positioning to SKIET's CCS offering.
• Kolon Industries: Korean materials company producing colorless polyimide (CPI) film for foldable displays — directly competing with SKIET's FCW product in the flexible display cover window market.
• Asahi Kasei: Japanese chemical company and one of the world's largest lithium-ion battery separator manufacturers (Hipore brand), directly competing with SKIET's LiBS in wet-process separators for EV and consumer electronics batteries.
• Entek International: US-based manufacturer of polyethylene separators for lithium-ion batteries with expanding production capacity. Competes with SKIET in wet-process separators particularly for Western markets.

Broad incumbents

• Mitsubishi Chemical Group: Japanese chemical conglomerate producing battery separators and other advanced materials for lithium-ion batteries and displays. Broader portfolio than SKIET but overlapping in separator film technology and display materials.
• Sumitomo Chemical: Japanese chemical company producing battery separator materials (including aramid-coated separators) and display-related films. Larger diversified chemicals business with overlapping battery materials portfolio.

Others

• SK On: Sister company under SK Innovation, a major global EV battery manufacturer. Not a competitor but a likely captive customer for SKIET separators and a key indicator of demand trends within the SK Group ecosystem.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks7 records

Key highlights7 records

Customer concentration

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles6 records

Subsidiaries2 records

Funding overview

Funding rounds1 record

Investors1 record

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about SK IE Technology