Abstract Body

For most HTS applications to be commercially-competitive with conventional technologies, the HTS conductor cost has to be in the range of $10/kA-m. The best option for an order-of-magnitude reduction in cost is to increase the critical current (I_c). Previously, we had demonstrated REBCO tapes using Advanced Metal Organic Chemical Vapor Deposition (A-MOCVD) with up to 5x the I_c of industrial tapes. In order to achieve even higher I_c as well reduce unit cost ($/m), we have developed double-sided REBCO tapes wherein both sides of the tape are simultaneously coated with REBCO film in a single step by A-MOCVD [1]. In addition to doubling the I_c, double-sided tapes lead to very efficient use of expensive metal organic precursors, contributing to significant cost reduction. Furthermore, double-sided REBCO tapes always enable face-to-face joints which have 10x lower resistivity than face-to-back joints made with single-sided tapes. Such low contact resistivity also facilitates excellent current sharing between adjacent tapes. The latest results on the electrical and mechanical properties of double-sided REBCO tapes will be presented.

References

1. M. Paidpilli, J. Sai Sandra, B. Sarangi, C. Goel, E. Galstyan, G. Majkic, V. Selvamanickam, “High-Current, Double-Sided REBCO Tapes by Advanced MOCVD” Supercond. Sci. Technol. 36, 095016 (2023)

Acknowledgment

This work was funded by award DE-AR0001374 from the Advanced Research Projects Agency – Energy (ARPA-E) and STTR award N68335-21-C-0525 from the Naval Air Systems Command (NAVSEA) through AMPeers LLC.