Exploring the potential of one-dimensional van der Waals material V2PS10/carbon composite: An anode design paradigm for lithium-ion batteries

Abstract

One-dimensional (1D) van der Waals (vdW) materials have garnered significant attention for their unique structures and properties, making them promising candidates for various applications in optoelectronics, catalysis, energy storage, and sensors. However, further advancements are required to fully exploit their potential as energy storage devices. This study presents an anode design paradigm utilizing 1D vdW-based V2PS10 crystals characterized by large vdW gaps, a small bandgap, and distinctive chemical compositions that favor lithium storage. To enhance their performance, we employ surface modification techniques to create V2PS10 @C composites, where conductive carbon is integrated with V2PS10 crystals. This modification significantly improves electron transport and Li-ion diffusion within the composite anodes. The resulting composite anodes exhibit exceptional electrochemical properties, including a high discharge capacity of 1154 mAh g−1 after the 50th cycle at 0.1 A g−1, superior rate performance with a current density of 561 mAh g−1 at 10 A g−1, and prolonged cycling stability, maintaining a capacity of 605 mAh g−1 for up to 800 cycles at 5 A g−1. These remarkable electrochemical performances underscore the immense potential of 1D vdW-based materials as next-generation anodes for lithium-ion batteries.

Keywords

• One-dimensional material
• V2PS10
• Van der Waals material
• Cycling stability
• Lithium-ion battery