复合集流体有望“上车”两大领域

Core Viewpoint - The article discusses the upcoming 2025 Fifth Electric Two-Wheeler Battery Swap Conference and the advancements in composite current collectors in the lithium battery industry, highlighting their potential impact on solid-state and consumer batteries [2][10]. Group 1: Event Details - The event is themed "Swap City, Smart Two-Wheelers" and will take place on July 11, 2025, at the Shenzhen Baoan Dingshi International Hotel [2]. - Various sponsors and partners include leading companies in the battery and electric vehicle sectors, such as Yadi Technology Group, New Day Co., and others [2]. Group 2: Composite Current Collectors - Composite current collectors are crucial for lithium batteries, consisting of a sandwich structure with two conductive metal layers and a polymer layer, which enhances performance [3]. - The thickness of the current collectors typically ranges from 4.5 to 8 micrometers, accounting for about 9% of the battery's mass and 10% of its cost [2]. - The technology is moving towards thinner and more functional designs, positioning composite current collectors as a future "star" in the lithium battery industry [2]. Group 3: Technical Challenges and Innovations - Composite current collectors face three main challenges: internal resistance, temperature rise, and rate capability, along with complex manufacturing processes and potential defects [3]. - The technology is expected to see breakthroughs in solid-state batteries, where the coating of nickel on copper foil can mitigate issues caused by sulfide electrolytes [4][6]. - Companies like Samsung SDI and Toyo Steel are already exploring innovative materials for solid-state battery current collectors [4]. Group 4: Consumer Battery Applications - The application of composite current collectors in consumer batteries is gaining traction, with companies like Jiangsu Yinglian collaborating with leading manufacturers to enhance fast-charging and energy density [6][7]. - The use of composite current collectors can significantly reduce battery weight while improving energy density, aligning with the trend towards thinner consumer electronics [7][8]. - OPPO has already implemented composite current collectors in their VOOC flash charging platform, showcasing the technology's advantages in safety and performance [8][9]. Group 5: Market Outlook - Despite existing challenges, the demand for composite current collectors is expected to grow, leading to a diverse range of technological developments in the market [9]. - The competition among battery manufacturers is likely to drive innovation, resulting in the emergence of the most suitable technologies for market needs [9].