Cost-effective electrodeposition of an oxide buffer for high-temperature superconductor coated conductors

Abstract

It is demonstrated that electrodeposition is a promising cost-effective technique to grow oxide buffer on metallic tapes. The resultant layer of CeO 2 shows the biaxial texture of FWHM = 5.5 • as well as a smooth surface of RMS = 2.0 nm, and YBa 2 Cu 3 O 7−δ coated conductor with such a buffer exhibits the critical current density of 1.85 MA cm −2 at 77 K. Of more interest is that the CeO 2 film thickness reaches a high value of more than 200 nm without any cracks, while it is very hard to achieve a thickness of more than 70 nm in the conventional vapor deposition methods employed.

Enabling High-Temperature Superconducting Technologies Toward Practical Applications

“…Very recently, Shanghai University has developed a creative way, a nonvacuum electrodeposition technique to prepare oxide buffer layers with excellent texture and morphology quality [69]. To combine the electrodeposition technique for buffer layers and extremely low-fluorine chemical solution for YBCO superconducting layers, allowing one to see promising costeffective, and high-rate technical routes for the industrialization of YBCO coated conductors.…”

In situ hydrostatic pressure induced improvement of critical current density and suppression of magnetic relaxation in Y(Dy0.5)Ba2Cu3O7−δ coated conductors

“…Most technological applications of high temperature superconductors, however, do not involve polycrystalline crystals or films, but rather so-called coated conductors, which are films epitaxially grown on long-length highlytextured buffered metallic tapes [4,23]. State-of-the-art coated conductors have the highest critical current densities among superconducting materials and have been incorporated in a variety of in-magnetic-field applications, such as wires for electrical transport, magnets, fault current limiters, transformers, motors, generators, and flywheels [24].…”