ACS Nano. 2025 Oct 29. doi: 10.1021/acsnano.5c13044. Online ahead of print.
ABSTRACT
Designing high-rate anodes for lithium-ion batteries (LIBs) remains a critical challenge due to the sluggish ion dynamics and capacity degradation of graphite-based materials under high-rate cycling. Here, we present a surface-lithiated porous graphite (LPG) anode designed through synergistic structural and interfacial modifications. Micron-scale pores introduced on graphite basal planes reduce Li+ diffusion distance while maintaining a low specific surface area (≤ 2 m2·g-1), ensuring an initial Coulombic efficiency exceeding 90%. Surface lithium-containing groups are identified as a key factor in inducing the formation of a Li3PO4-enriched solid electrolyte interface (SEI), which effectively mitigates Li+-solvent interactions and enhances desolvation kinetics. As a result, LPG anodes exhibit good high-rate capabilities, delivering a delithiated capacity of 327 mAh·g-1 at 50 C and retaining 88.9% initial capacity after 2000 cycles at 5 C. With kilogram-scale production and soft-pack battery verification, this strategy positions LPG as a scalable, high-rate anode solution for next-generation LIBs, achieving a good balance between rate performance and capacity retention. Surface-lithiated porous graphite achieves a good balance in balancing rate performance and capacity retention for lithium-ion batteries.
PMID:41160844 | DOI:10.1021/acsnano.5c13044
