In situ coupling of crosslinked CNTs and Li-excess disordered rock salt vanadium oxide nanowires for high-performance Li storage

Lithium-rich disordered rock salt (DRS) materials with appropriate intercalation potentials and three-dimensional Li percolation pathways receive intensive attention as a promising anode candidate for fast-charging lithium-ion batteries. However, the current bulk DRS structures address a great challenge due to the poor conductivity and multiscale complex percolation network. Herein, we present a two-step fabrication of in situ coupling CNTs and DRS-Li 3 V 2 O 5 nanowires composites via combining hydrothermal and electro-redox reactions. The robust hybrid architecture endows the nanocomposite with Li-ion and electron transport pathways, a highly reversible percolation network , and excellent mech anical stability, enabling flexible electrodes with outstanding lithium storage performance. The use of such hybrid electrodes effectively increases a specific capacity (approximately 2 times greater than that of their bulk counterparts), a high-rate capability at high mass loading, good temperature adaptability, and long-term cycling stability, with ∼80 % retention over 1000 cycles at a 2C-rate. This work provides a facile yet effective strategy toward high-performance LIBs with other DRS electrode innovations. Highly robust, binder-free anode based on crosslinked CNTs and Li-excess disordered rock salt vanadium oxide nanowires were developed for lithium-ion batteries, affording high capacity and high reversible Li-ions percolation networks, and resulting in batteries with significantly improved energy density, rate capability, long lifespan, and low-temperature performance.