During September 18-20, the "2025 Suining International Lithium Battery Industry Conference" was held in Suining, Sichuan Province. On the afternoon of September 19th, Guo Chen, Deputy Director of the Advanced Technology Research Institute at Shenzhen Senior Technology Material Co.,Ltd. (300568), along with other representatives from the battery and new energy industry chain enterprises, was invited to participate in the solid-state battery sub-forum interactive session of this industry conference.
At the conference, Guo Chen stated that during the current booming phase of solid-state batteries, Shenzhen Senior Technology Material is continuously making efforts to contribute to the solid-state battery industry. For semi-solid state batteries, the company provides composite electrolyte membrane materials including oxides and polymers. For all-solid-state batteries, the company mainly provides skeleton membranes with relatively large pore sizes and high porosity, as well as electrolyte composite membranes with thin structure, high ionic conductivity, and high strength.
"I'll discuss this from two perspectives: semi-solid state and all-solid-state batteries. First, regarding semi-solid state batteries, Shenzhen Senior Technology Material can be said to be the first company in the entire new energy industry to achieve mass production of electrolyte membranes for semi-solid state batteries. We recently signed a very large order for power and energy storage projects, which is a very practical project. The raw materials mainly use oxide electrolytes, and through the performance optimization that the electrolyte itself brings to the separator, such as capacity improvement at low temperatures, impedance reduction, and safety enhancement. Based on our own testing and customer feedback, the results are very positive. This type of product also offers excellent cost-effectiveness - it's not much more expensive than our existing products, which is why we can supply such large volumes to the market. We will continue to work with upstream and downstream companies to track their new requirements, and if there are more high-end application scenarios in the future, we will certainly launch corresponding semi-solid state or all-solid-state products," Guo Chen further explained.
"From the perspective of all-solid-state batteries, taking the currently popular sulfide all-solid-state batteries as an example, we currently have two types of routes. One type involves processing electrolyte materials onto a substrate using dry or wet processes, then transferring them, usually to the negative electrode sheet, then directly cutting this and using stacking processes. The other route, which we have always wanted to promote, is to introduce skeleton membranes with particularly high porosity, at least 60-80%, and pore sizes much larger than traditional separators. Wet processes would be more suitable, filling the electrolyte into the skeleton pores through appropriate methods. This type of electrolyte composite membrane is not only easy to make thin with higher strength, but also has better flexibility, capable of large-angle bending, and can even match Z-type stacking processes. There's also the Overhang design issue in sulfide batteries, where the negative electrode is larger than the positive electrode, requiring complex processes and equipment to solve, with relatively low yield rates. Using this type of electrolyte composite membrane can effectively solve this problem. Therefore, even in the all-solid-state battery stage, I believe traditional separator companies can still fully demonstrate their value in the industry," Guo Chen concluded.
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