Abstract
Bismuth (Bi) based materials are widely utilized in potassium-ion batteries (PIBs) due to their high theoretical capacity; however, they undergo severe volume changes during electrochemical processes. To develop Bi-based anode with extended lifespan, Bi nanoparticles and porous carbon materials were composited by a template method in this study. N-doped three-dimensional porous carbon coated Bi nanoparticles (Bi@3DNC) composites were successfully synthesized by using sodium chloride as a template and anchoring Bi nanoparticles on a porous carbon skeleton. Bi@3DNC exhibits excellent electrochemical performance as an anode material for PIBs, retaining a capacity of 273 mAh/g after 700 cycles at 1 A/g. We elucidate that the 3D porous carbon mesh serves to confine the alloying particles and buffer the volume expansion of the metal during continuous K+ de-intercalation, while also enhancing the availability of active sites. This strategy offers promising prospects for the development of advanced metal based anodes for PIBs.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call