Application of magnetron sputtering technique to fabricate sulfur/carbon composites cathode plates of lithium-sulfur battery

摘要

The magnetron sputtering technique is introduced to fabricate sulfur/carbon composite cathode plates for lithium-sulfur (Li-S) batteries by reducing the size of sulfur particles so they combine well with carbon particles without adding a binder to simplify the traditional technology. The bulk sulfur/carbon powder target is prepared to sputter sulfur and carbon atoms together onto Al foil to form a porous and reticular structure that overcomes the disadvantages of traditional technologies and improves the electrochemical properties of Li-S batteries. Li-S button cells are assembled using the developed cathode plates, and the electrochemical test results show that the 1st and 100th discharge specific capacities are 1240.8 and 926.2 mA.g(-1), respectively, which are much greater than the performance of Li-S battery made using traditional technologies. (C) 2020 Elsevier B.V. All rights reserved.