SK iet

SK iet (also written SK ie technology) is a South Korean battery-materials brand that produces separator films for lithium-ion batteries used in electric vehicles and consumer electronics. The brand sits within the broader SK group ecosystem and is associated with advanced wet-process separator manufacturing, a critical component in battery cell production. Separators are thin, porous membranes that physically separate the anode and cathode while allowing lithium ions to pass, making them essential to battery safety and performance. SK iet has positioned itself as a supplier to major battery cell makers and automotive OEMs, with production sites in South Korea, China, and Europe. The brand's technology focus includes ceramic-coated separators and high-strength films designed for next-generation battery chemistries. As the electric-vehicle market expanded through the 2010s and 2020s, separator demand grew, and SK iet became one of a small number of global suppliers capable of high-volume, high-quality output. The company has pursued capacity expansions and long-term supply agreements with battery manufacturers, reflecting the strategic importance of separator materials in the battery supply chain. Ownership and corporate structure have evolved, with SK ie technology operating as a subsidiary within the SK group before and after its public listing. The brand competes with other separator producers in Asia and is sensitive to battery demand cycles, raw-material costs, and geopolitical supply-chain shifts. Its identity is closely tied to the energy transition and the industrialization of electric mobility.

SK iet, also referred to as SK ie technology, is a South Korean battery-materials brand focused on separator films for lithium-ion batteries. The brand emerged from the SK group's broader push into advanced materials and energy-related businesses. Separators are a critical and technically demanding component of lithium-ion cells: they must be thin, strong, chemically stable, and capable of shutting down ion flow under thermal runaway conditions to improve safety. SK iet developed wet-process separator technology and later added ceramic coating capabilities to serve higher-energy-density battery designs. As electric-vehicle adoption accelerated globally, separator demand rose sharply, and SK iet invested in manufacturing capacity across multiple regions, including South Korea, China, and Europe, to be close to major battery cell customers. The company signed long-term supply agreements with battery makers and automotive OEMs, reflecting the strategic nature of separator supply. In 2021, SK ie technology was listed on the Korea Exchange, a move that provided capital for expansion and raised the brand's public profile. The business has since navigated volatile battery-market conditions, including shifts in EV demand growth, raw-material price swings, and competitive pressure from other Asian separator producers. SK iet continues to position itself around high-quality, high-volume separator production and next-generation battery materials.

• 2021

  SK ie technology listed on the Korea Exchange

Supplier of high-performance battery separator materials for the electric-vehicle and energy-storage supply chain.

• Lithium-ion battery separator

  Thin porous membrane separating anode and cathode in battery cells.

• Ceramic-coated separator

  Separator with ceramic coating for improved thermal stability and safety.

1. 1SKIET.COM | Strategic-Grade domain names for established businesses and funded startupsskiet.com