N-doped C encapsulated Li2TiSiO5 nanoparticles for high-rate highly stable lithium storage.

Achieving high charging rates (≤ 15 min) in lithium-ion batteries (LIBs) is imperative for their widespread implementation in all-electric vehicles. However, the pursuit of elevated charging rates often leads to compromises in capacity and cycling stability. In this manuscript, we present a groundbreaking approach utilizing a composite material composed of nitrogen-doped carbon-encapsulated Li 2 TiSiO 5 nanoparticles (LTSO@C-N) as the anode material for LIBs, offering rapid and exceptionally stable lithium storage. The encapsulation of Li 2 TiSiO 5 nanoparticles by nitrogen-doped carbon is realized via a facile liquid-phase polymerization and the following pyrolysis route. The uniformly deposited nitrogen-doped carbon layer on the surface of Li 2 TiSiO 5 nanoparticles within LTSO@C-N serves a dual purpose: enhancing the conductive properties of Li 2 TiSiO 5 to ensure efficient charge transfer and Li+ transport, while concurrently inhibiting grain pulverization over extended cycling periods. The deliberate incorporation of nitrogen-doped carbon optimizes Li 2 TiSiO 5 anode electrochemical performance, simultaneously reducing structural degradation during prolonged cycling. This enhances the lithium-ion battery system's long-term stability and reliability. While exhibiting an average operational potential of approximately 0.28 V in comparison to Li+/Li, the LTSO@C-N electrode manifests a commendable specific capacity of 345 mAh g-1 at a current density of 0.1 A g-1. Notably, it attains a robust lithium storage capability even under high-rate conditions, exemplified by a sustained capacity of 205 mAh g-1 over 1000 cycles at 2 A g-1, devoid of any discernible decay. The electrode's impressive electrochemical performance highlights its potential as an advanced anode for high-performance lithium-ion batteries, ensuring stability. [Display omitted] • Nitrogen-doped carbon encapsulation Li 2 TiSiO 5 was developed by a solution polymerization method. • The uniform coating of nitrogen-containing carbon layer greatly improves the electrical conductivity of Li 2 TiSiO 5. • The nitrogen-doped carbon encapsulation Li 2 TiSiO 5 electrode achieve higher rate performance and cycling stability. [ABSTRACT FROM AUTHOR]