SIGRACELL battery felts are used in advanced batteries such as redox flow or NaNiCl batteries. SIGRACELL combines excellent chemical resistance and inertness with high porosity and good electrical conductivity.

 Ideal properties for an efficient charge exchange 

Permeable electrodes made of SIGRACELL carbon and graphite felts are the first choice for high-temperature batteries like redox flow batteries. SGL felts are used for anodes as well as cathodes. Thanks to a unique combination of electrical conductivity, electrochemical stability, high porosity and good elasticity, they facilitate an efficient charge exchange between the electrolyte and the bipolar plate. 

Felt activation for enhanced performance 

We offer felt activation through thermal surface oxidation. This treatment induces wettability by generating hydrophilic surface functions while preserving the structural integrity of the fibers, since the burn-off only affects a few percent.

Features

● Excellent electrical conductivity

● High chemical resistance

● High open porosity

● High purity

● Good elasticity

● Available in large dimensions

● On demand: SGL Carbon thermal felt activation

By applying SGL Carbon thermal felt activation, BET surface area as well as overall cell performance increases significantly.