Nanosized Li2S Loaded Polar Porous Carbon Nanofibers as Self Supporting Electrodes in Anode Free Lithium Sulfur Batteries

Anode free lithium sulfur Li S batteries with Li2 S as the cathode o amp; 64256;er a promising alternative to improve practical energy density but su amp; 64256;er from sluggish redox kinetics on the cathode side and chaotic Li plating stripping process on the copper current collectors. In this work, phosphorus doped porous carbon nano amp; 64257;bers P CNFs are served both as self standing hosts for Li 2 S cathode and 3D current collectors for Li deposition. In the cathode, nanoscale Li 2 S particles less than 10 nm in size are in situ synthesized via carbon thermal reduction of lithium sulfate which is con amp; 64257;ned within the brush layer of anionic spherical polyelectrolyte brushes. The incorporation of Li2 S nanoparticles within the void of P CNFs Li 2 S P CNFs imparts unimpeded electron ion transport at the polar carbon matrix interface, thus enhancing the Li 2 S conversion reaction kinetics and mitigating the shuttling e amp; 64256;ect of polysul amp; 64257;des during cycling. Moreover, the lithiophilic P CNFs skeleton with interconnected macropores e amp; 64256;ectively homogenizes Li plating behavior, resulting in smooth and compact deposition morphology. As a result, the Li 2 S P CNFs P CNFs full cell delivers a low capacity decay of 0.051 cycle amp; 8722;1 for 1000 cycles at 1 C. This work gives a unique strategy for the practicalization of anode free Li S batteries, with the potential to extend to other battery systems