[3PS-013]
FeP nanoparticles and Fe single atoms on N, P co-doped carbon for boosting redox kinetics in Li–S batteries
발표자김대겸 (중앙대학교)
연구책임자유영재 (중앙대학교)
Abstract
Rational design of sulfur host materials to supress the dissolution of lithium polysulfides (LiPSs) is of great significance to accomplish efficient sulfur chemistry for high-performance lithium sulfur batteries (LSBs). Herein, FeP nanoparticles and Fe single atoms decorated in the N, P co-doped porous carbon prepared by an in-situ self-assembled method followed by pyrolysis process. In addition, multi-walled carbon nanotubes (MWCNTs) were also incorporated to enhance electrode conductivity. The hierarchical porous structures provide abundant active interfaces for LiPSs conversion as well as rapid Li-ion transfer kinetics. Moreover, by adjusting the Fe precursor ratio, a synergistic coexistence of FeP nanoparticles and Fe single atoms significantly enhanced polysulfide conversion kinetics and suppressed the shuttle effect. The electrochemical performances were conducted using Galvanostatic charging/discharging, cycle voltammetry, and long-term cycle stability.