The world's first international standard for silicon-based negative electrodes for lithium-ion batteries, formulated by China, has recently been officially promulgated. This groundbreaking achievement marks significant progress made by China in the international standardization work of new energy materials, providing key technical support for the high-quality development of the global silicon-based negative electrode material industry.
This international standard systematically established a quality control framework for lithium-ion battery nano-silicon-based negative electrode materials. It first clearly defined the testing methods and evaluation criteria for 12 core performance indicators such as specific capacity, first-cycle Coulombic efficiency, and volume expansion rate. Among them, for the problem of the up to 300% volume change of silicon-based materials during charging and discharging, the standard innovatively introduced a dynamic cycling test method. By simulating the deformation monitoring under real working conditions, it effectively improved the accuracy of material reliability assessment. These technical specifications filled the gap in the international standard system regarding the testing methods for silicon-based negative electrode materials, providing a unified quality benchmark for the global industrial chain.
As a key material for the new generation of high-energy-density batteries, the theoretical specific capacity of silicon-based anodes can reach 4200 mAh/g, which is over 10 times higher than that of traditional graphite materials. Industry analysis shows that the total global production of lithium-ion battery anode materials will reach 21.6 million tons in 2024, with the proportion of silicon-based composite materials exceeding 60%. Their penetration rates in high-end application fields such as power batteries and consumer electronics continue to rise. New-generation products like Tesla's 4680 battery and CATL's Kirin battery all adopt silicon-based anode technology, pushing the energy density of individual battery cells to exceed 300 Wh/kg.
The implementation of this standard will bring about significant industrial effects: In the production process, unified technical specifications can reduce the R&D costs of enterprises by approximately 15% and shorten the new product development cycle by 30%; at the application level, clear quality standards can help eliminate technical barriers in international trade and promote the coordinated development of the global industrial chain. According to estimates, within three years after the implementation of the standard, the global market size of silicon-based negative electrode materials is expected to exceed 50 billion yuan, driving the creation of over 100 billion yuan in economic value for the upstream and downstream industrial chains.
July 28, 2025 China Metallurgical Nonferrous Metals Network