A self-forming dual-phase membrane for high-temperature electrochemical CO2 capture

Abstract

We report here a dual-phase mixed CO₃²⁻- and e⁻-conducting CO₂ capture membrane self-formed at high temperatures from NiO and molten carbonate. The levels of flux density and selectivity demonstrated by this membrane were better than those of the conventional “size-sieving” inorganic and “dissolution–diffusion” organic counterparts. These features of the membrane we made, combined with its resistance to sintering, low cost, and ease of fabrication, make its use a promising CO₂ capture technology.