Lotte Energy Materials Holds First "Tech Day" to Secure Next-Generation Battery Materials

First-Ever Tech Day Since Founding
Tailored Technologies for Next-Generation Batteries
Unveiling Ultra-Low Roughness Circuit Foil Products for AI

Lotte Energy Materials held its first-ever "Tech Day" since its founding, sharing its technological capabilities in core businesses such as high-value-added circuit foil and battery foil for artificial intelligence (AI), as well as the development direction of next-generation battery materials.

On the afternoon of the 19th, Ryu Jongho, Head of R&D at Lotte Energy Materials, is explaining at Tech Day held at Signiel Seoul in Songpa-gu, Seoul. Lotte Energy Materials

On the afternoon of the 19th, the company hosted "Tech Day 2025" at Signiel Seoul in Songpa-gu, Seoul, targeting analysts. During the event, Lotte Energy Materials unveiled its high-value-added circuit foil for AI, its high-end copper foil product "HiSTEP," and next-generation battery materials such as lithium iron phosphate (LFP) cathode materials and sulfide-based solid electrolytes. In the following session, Ryu Jongho, Chief Technology Officer (CTO) and Head of R&D, spent about one hour explaining the differentiated technologies and commercialization status of high-value-added circuit foil and battery foil products for AI.

The company presented a lineup of five ultra-low roughness circuit foil products for AI networks, including fourth- and fifth-generation products currently under development. These products are designed to maximize power efficiency and enable ultra-low latency communications, aiming to solidify Lotte Energy Materials' leadership in the high-value-added circuit foil market for AI. In addition, the company showcased its ultra-thin and ultra-low roughness circuit foil technologies for semiconductor packaging, which are suitable for high-speed signal transmission and minimizing signal loss.

The company also highlighted the differentiated features of its high-end battery foil product "HiSTEP," which is less sensitive to temperature changes and thus reduces defect rates during processing. Its high strength and high elongation characteristics enable further thinning of battery foil for energy storage systems (ESS). The company explained that applying silicon anode active material with a content of more than 10% can further enhance stability.

Ryu stated, "By securing high-end copper foil platform technology and next-generation battery materials, we will continue to provide supply stability for Korea's battery, AI, and semiconductor industries. We will also work to create customer value by strengthening our technological capabilities and product competitiveness."

Lotte Energy Materials is also enhancing its future core competitiveness through next-generation battery materials such as LFP cathode materials, sulfide-based solid electrolytes, and next-generation anode current collectors for all-solid-state batteries. The LFP cathode material plant, which completed construction of a 1,000-ton annual capacity pilot facility in December last year, achieved early stabilization of the LFP process based on its experience operating lithium manganese oxide (LMO) cathode material processes. The company is currently working with customers to advance its products using its proprietary particle size control technology. The pilot plant for sulfide-based solid electrolytes, equipped with both dry and wet synthesis and particle size control technologies, was built at the Iksan plant in North Jeolla Province in the second half of last year and is currently undergoing testing.

Lotte Energy Materials is also developing next-generation anode current collectors for all-solid-state batteries by plating nickel onto conventional copper foil to enhance heat resistance and corrosion resistance. From the battery design stage, the company is able to control the thickness of the nickel plating layer to provide optimal properties, ensuring consistent uniformity in the current collector.

Meanwhile, Lotte Energy Materials expanded its research and office buildings last month by approximately 2,385 square meters (about 721 pyeong) to strengthen its R&D capabilities and secure competitiveness and efficient commercialization of next-generation battery material technologies.

This content was produced with the assistance of AI translation services.