Fe2O3 nano particles embedded Fe2O3/BP2000 composite for Li-S battery

Abstract

Shuttle effect of lithium polysul des in lithium sulfur batteries greatly in uenced their commercialization.Therefore, it is urgent to develop a cheep and effective way to alleviate the shuttle effect. Fe is an active transition element which has good catalytic ability, in this work, a simple wet impregnation method was used to make Fe ions in ltrate into the pores of BP2000 (a kind of commercial conductive carbon), then it was calcined in N 2 atmosphere to get a Fe 2 O 3 /BP2000 composite and used as a separator modi cation layer. The Fe 2 O 3 nano particles are decorated in the pores of BP2000 which greatly enhanced the absorption ability on lithium polysul des, additionally it also has excellent catalytic effect on lithium polysul des, thus the Fe 2 O 3 /BP2000 layer can be served as a secondary collector to re-engage the polysul des in the cathode reaction. In this way, the lithium sulfur batteries use the Fe 2 O 3 /BP2000 modi ed separator show impressive electrochemical performances.