Method for improving current carrying capacity of second-generation high-temperature superconducting tape

A method for improving a current carrying capacity of a second-generation high-temperature superconducting tape, the second-generation high-temperature superconducting tape comprising a superconducting layer, the method comprising the following steps in a sequential manner:

• a) depositing the superconducting layer by pulsed laser deposition, chemical vapor deposition, or chemical solution deposition to prepare the second-generation high-temperature superconducting tape,
• wherein the second-generation high-temperature superconducting tape is plated with silver, and
• the superconducting layer of the second-generation high-temperature superconducting tape comprises a rare-earth barium-copper-oxide compound or a rare-earth barium-copper-oxide compound containing a non-superconducting second phase;
• b) stretching the second-generation high-temperature superconducting tape at 450-650° C. to produce a stretched second-generation high-temperature superconducting tape with a strain of 0.1-1% along a length thereof;
• and
• c) carrying out oxygenation heat treatment on the stretched second-generation high-temperature superconducting tape.