Summary:

The invention relates to tin-doped porous carbon fiber material reacted in situ in MOF pores and preparation method and application thereof. The present invention is based on the tin doping method of intrapore reaction of metal-organic framework material, using a metal-organic framework material with rich pore structure as a nano-reaction vessel, generating highly dispersed ultrafine tin dioxide nanoparticles through a confined in-situ decomposition reaction in the pores of metal-organic framework materials, and then electrospinning after mixing with polyacrylonitrile, and calcination to prepare a nitrogen-doped porous carbon fiber material with highly dispersed tin nanoparticles. The material has good sodium-philic characteristics, can form a sodium-tin alloy with sodium to induce uniform deposition of sodium metal, as a current collector can significantly reduce the nucleation overpotential, its special sponge-like porous structure has a very high space utilization rate, can realize the rapid adsorption of molten sodium metal, improve the metal load capacity in the composite anode, and inhibit the dendrite growth in the electrochemical process, and improve the cycle life of the battery.

Link: http://epub.cnipa.gov.cn/patent/CN115434041A?8kt2YOWWXQBD=1700794370724