Core Insights - The article discusses the development of a new type of battery technology known as the "negative-free battery," which allows lithium ions to deposit directly on the current collector surface without pre-installed active materials, differing from traditional graphite and lithium metal batteries [1][2]. Industry Developments - Contemporary advancements include CATL's launch of the "self-generating negative electrode" technology in April 2025, which significantly enhances energy density and cycle life by increasing ion conduction speed by 100 times and lithium deposition particle size by 10 times, while constructing a self-protective layer to suppress side reactions [2]. - BYD has publicly disclosed a patent for a negative-free battery that utilizes a porous sponge-like current collector, gradually enhancing lithium affinity from one side to the other, and incorporating lithium, sodium, and magnesium to lower the kinetic barriers of electrochemical reactions, guiding lithium ions to preferentially deposit at the bottom for stable growth [2]. Company Focus - Attention is drawn to Zhongyi Technology, a key player in negative-free technology, which has over a decade of experience in the copper foil sector. The company focuses on high-performance electrolytic copper foil, with its patented lithium-copper integrated composite negative electrode material designed to suppress lithium dendrite growth, reduce impedance, and improve lithium-ion electrochemical performance, resulting in superior battery cycle stability [2].