Against the backdrop of accelerating industrialization of solid-state batteries, a solution based on novel fluorosilicone materials has drawn industry attention today regarding the failure of encapsulation caused by the complex chemical environment inside the battery. The newly developed "Corrosion-Resistant Silicone Rubber Composite" successfully solves the problem of penetration by corrosion factors such as moisture, oxygen, and ions through unique molecular structure design, providing critical material support for the long cycle life of high-energy-density solid-state batteries. According to the R&D team, although solid-state batteries eliminate traditional liquid electrolytes, the sulfide or oxide electrolytes used internally can still release highly corrosive active substances under specific conditions. Furthermore, trace amounts of acidic gases generated during battery operation can erode traditional sealing materials. Traditional silicone sealants are prone to main chain scission or swelling when exposed to these corrosive media for extended periods, leading to seal failure and subsequent battery performance degradation or even safety hazards. The newly released composite uses modified polysiloxane as the matrix and innovatively introduces fluorinated alkyl side chains and special modified additives. During the preparation process, active groups on the polysiloxane molecular chains undergo a grafting reaction with the additives, forming a dense three-dimensional crosslinked network. This network structure not only physically extends the diffusion path of corrosive media but also utilizes the strong hydrophobicity and chemical inertness of fluorinated alkyl groups to construct a "molecular-level shield" on the material surface. Experimental data shows that after applying this material to solid-state battery post sealing and housing encapsulation, the battery's cycle life in the "double 85" aging test (85°C / 85% relative humidity) increased by more than 40%. Meanwhile, in simulated electrolyte immersion tests, the material exhibited near-zero volume swelling and effectively blocked the erosion of strong corrosive by-products such as hydrofluoric acid. Industry experts point out that as solid-state batteries move from the laboratory to mass production, the chemical stability of encapsulation materials has become a bottleneck restricting their performance. The emergence of this new corrosion-resistant fluorosilicone composite fills the final gap in the solid-state battery material system. It is expected to be incorporated into the supply chains of more battery manufacturers starting in the second half of 2026, promoting the commercial deployment of solid-state batteries in new energy vehicles and energy storage fields.
IOTA MF Methylfluorosilicone oil