5 Billion! Jiangsu Yucheng Polyimide Lithium Battery Separator Industrialisation Project Commences Construction. Recently, the Jiangsu Yucheng polyimide lithium battery separator industrialisation project, with a total investment of 5 billion yuan, commenced construction in Yixing, Jiangsu. The project is led by the high-performance polymer research team from Beijing University of Chemical Technology, which is responsible for the technical breakthroughs. It will effectively enhance the safety of lithium-ion batteries in the current new energy industry. The first phase of the project is scheduled to be completed and put into operation in October 2025. The polyimide separator products produced have applied for over 50 patents, with 35 already granted. The core patents have been submitted for PCT international patents, which is of significant importance for the technological upgrade of China's lithium battery separator industry.