Highly aligned lithiophilic electrospun nanofiber membrane for the multiscale suppression of Li dendrite growth

Using inorganic fibrous membranes as protective layers has yielded success in suppressing dendrite growth. However, conventional usually have large voids and low affinity for Li, promoting inhomogeneous charge distribution allowing some dendrites to grow. Herein, we introduce a highly aligned TiO2/SiO2 (A-TS) electrospun nanofiber membrane layer the Li metal anode. The A-TS is fabricated by custom-made electrospinning system with an automatic fiber alignment collector that allows control of fibers’ orientation. At scale individual fibers, their high binding energies can attract more “dead” reacting SiO2 component composite, avoiding uncontrollable deposition on scale, these ordered structures achieve homogeneous contact surface, leaving no vulnerable areas nucleate formation. Additionally, excellent mechanical thermal stability properties prevent any potential puncturing or runaway battery. Hence, [email protected] anode exhibits stable cycling performance when used both Li–S Li–NCM811 batteries, highlighting significant reference values future design development high-energy-density metal-based battery systems.