Influence of Nd-MOF/CNF-derived Nd2O3-C/CNF composite on lithium–sulfur batteries

Abstract

The shuttle effect of soluble lithium polysulfide (LiPS) is a major obstacle to the practical application of lithium–sulfur (Li–S) batteries. In order to reduce the negative impact of the shuttle effect, Nd-MOF was combined with carbon nanofibers (CNFs) so that Nd-MOF was embedded in the CNFs and the Nd₂O₃-C/CNF composite was realized as a separation modification material. This embedded structure made the combination between Nd₂O₃-C and CNFs tighter, and it exhibited better synergistic effects to inhibit the shuttle effect of polysulfides while also enhancing the tensile strength of the separator and improving the safety performance of the battery. Based on these advantages, a lithium–sulfur coin cell with the Nd₂O₃-C/CNF-modified separator exhibited excellent electrochemical performance.