Status of R&D toward the nEXO detector

The nEXO experiment, based on the success of the EXO-200 detector, will search for neutrinoless double beta decay of $^{136}$Xe using $\sim5$ tonnes of enriched liquid xenon in a low background time projection chamber. The nEXO Collaboration is engaged in an R&D program to improve charge and light readout, high voltage performance, and xenon purity measurement, as well as identify novel low background materials and develop low-noise in-liquid xenon electronics. This talk will present the status and future prospects of this program.