Jiujiang DeFu Technology

In 1985, a company was founded in Jiujiang, China, that would become a critical supplier for two of the world's most transformative industries. That company, Jiujiang DeFu Technology, began its journey focused on the research, development, and sale of electrolytic copper foil. The business is simple in concept but complex in execution. DeFu Technology manufactures ultra-thin copper foils, a fundamental component for printed circuit boards (PCBs) and, crucially, for the anodes in lithium-ion batteries. This positioned them directly in the value chain for everything from consumer electronics to the booming electric vehicle and energy storage markets. The company is led by Chairman Ke Ma and General Manager Jia Luo. Their playbook involved deep technical expertise, allowing them to produce a wide range of high-performance copper foils. This capability attracted major customers like CATL, LG Chem, and BYD, embedding DeFu Technology into the global battery supply chain. The company's focus on R&D is highlighted by its national high-tech enterprise status in China. A major turning point arrived in August 2023 when Jiujiang DeFu Technology successfully launched an Initial Public Offering on the Shenzhen Stock Exchange. This move provided the capital to further expand its production capacity and solidify its market position. Today, DeFu continues to grow, acquiring competitors like Circuit Foil Luxembourg in 2025 and aiming to build the world's largest copper foil base, powering the batteries of today and tomorrow.