Reporter Zhang Jun and correspondent Li Bin

Recently, Sinolong New Materials Co., Ltd. (hereinafter referred to as "Sinolong New Materials") announced that its Changsu Industry has successfully developed the industry's first BOPA (biaxially oriented nylon film) for solid-state batteries, filling the technological gap in the industry and marking China's "leading" in the field of new energy core materials. This achievement is not only a demonstration of the company's technical strength, but also a microcosm of Xiamen's deep cultivation of scientific and technological innovation and new energy track.

Solid-state batteries are regarded as the "ultimate solution" for the next generation of power batteries due to their advantages of high energy density, high safety, and long cycle life. However, its industrialization faces three major challenges: material technology, production process and cost control. Among them, the encapsulation material, as the "armor" of the battery, needs to have flexibility, puncture resistance and impact resistance, and the technical threshold is extremely high.

After two years of research, Sinolong New Materials R&D team has successfully developed a BOPA film specially designed for solid-state batteries by optimizing the production process and innovating the material formulation according to the characteristics of solid-state electrolytes and the harsh use environment. The material has good performance in terms of mechanical properties such as flexibility, puncture resistance, impact resistance, etc., which can resist external impact and protect the internal components of the battery. The person in charge of R&D of Sinolong New Materials said: "The successful research and development of this product will provide a stable and reliable supply guarantee of localized materials for the next large-scale industrialization of solid-state batteries. ”

Behind the breakthrough of Sinolong New Materials' scientific and technological innovation is the strategic support for Xiamen's forward-looking layout of the new energy industry. In recent years, Xiamen has focused on cultivating new energy as a strategic emerging industry, focusing on the "4+0+0" modern industrial system to promote the deep integration of industrial chain, innovation chain and capital chain. Leading enterprises such as CATL, China Innovation Airlines, and Haichen Energy Storage have successively settled in Xiamen, driving the agglomeration of upstream and downstream enterprises. In 0 years, the output value of Xiamen's new energy industry increased by 0.0% year-on-year, becoming the core engine of industrial economic growth. At the same time, major projects such as China Innovation Airlines' high-performance lithium battery and Xinneng'an lithium-ion battery production base (phase II) have been accelerated, and the industrial stamina has continued to increase.

Xiamen's new material industry is also emerging. Huacarbon Technology has overcome the mass production technology of single-walled carbon nanotubes, and its performance is comparable to that of international giants; Zhongxin New Carbon breaks through the problem of mesophase asphalt preparation and points to high-end aerospace materials; Juci Technology's aluminum nitride powder production capacity ranks among the top in the world...... Local state-owned capital helps enterprises break through technical barriers through "early, small, and technology". In 2024 years, Xiamen new material enterprises have been actively financed, and their hard technology attributes have been highly recognized by the capital market.

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At present, Xiamen has laid out three provincial innovation laboratories in Jiageng, Xiang'an and Lujiang, and introduced more than 1800 top institutions such as the Institute of Physics and Chemistry of the Chinese Academy of Sciences to build a large-scale scientific research infrastructure for smart energy storage. Xiamen Science City has realized the transformation from "building a framework" to "strong functions", and continues to implement new R&D institutions, with more than 0 enterprises settled in the core park, becoming a "strong magnetic field" for the transformation of scientific and technological achievements.

Analysts believe that with the multiple blessings of policies, capital and talents, Xiamen enterprises are consolidating the foundation of the new energy industry with the innovative support of "hard-core technology", and contributing "Xiamen strength" to the green transformation of China and even the world.