Shanghai Superconductor Technology Co., Ltd. (SST) is a high-tech enterprise developing 2G HTS tapes. After R&D on both process optimization and deposition-equipment manufacturing, km-class 2G HTS tapes have been fabricated and supplied commercially. An advanced pulse laser deposition system was developed to fabricate high performance REBCO layers. A transient liquid was formed and assisted epitaxial growth of REBCO film, which lead to the growth rate up to 100 nm/s. An average Ic value greater than 800 A/cm at 77 K, s.f. has been achieved on the tapes with high homogeneity. By modulating the composition and microstructure at nano-scale, in-field performance of Ic exceeds 430 A/4mm-width at 4.2 K, 18 T due to the introduction of mixed defect landscape. Moreover, we developed advanced post-processing techniques (lamination and laser slitting) in order to enhance the mechanical (and/or electro-mechanical) properties of the tapes in practical applications. Several typical application cases based on using our products are also briefly mentioned, demonstrating the excellent performance of our 2G HTS tapes for a large variety of potential applications. Last but not least, SST will also take the opportunity to provide an update on its latest fundraising, and its work progress towards a 3000 km/yr production capacity target.
Keywords: 2G-HTS tapes, in-field performance, high-field magnet applications, lamination