Drawbacks-Higher tier. At the moment, superconductors only work at very low temperatures. They have to be kept very cold with liquid nitrogen or liquid helium. A lot of work is going into developing superconductors that will work at normal temperatures.Until this happens, their uses will be limited. Page: 1  1.hey will have little or no electrical resistance. For example, mercury is a liquid metal. It solidifies at –38.8 °C and becomes a superconductor at –268.8 °C.