153 / 2024-03-06 13:00:25

Ultrafast Dual-shock Chemistry Synthesis of Ordered/Disordered Hybrid Carbon Anodes: High-Rate Performance of Li-Ion Batteries

Dual-shock chemistry • ordered/disordered hybrid carbon • Ultrafast synthesis • high-rate performance

Graphite exhibits crystal anisotropy, which impedes the mass transfer of ion intercalation and extraction processes in Li-ion batteries. Herein, a novel dual-shock chemical strategy has been developed to synthesize the carbon anode. This approach is comprised two key phases: 1) a thermal shock utilizing ultra-high temperature (3228K) can thermodynamically facilitate graphitization; 2) a mechanical shock (21.64MPa) disrupting the π-π interactions in the aromatic chains of carbon can result in hybrid-structured carbon composed of crystalline and amorphous carbon. The optimized carbon (DSC-200-0.3) demonstrates a remarkable capacity of 208.61 mAh g^-1 at a 10C rate, with a significant enhancement comparing with 15mAh g^-1.of the original graphite. Impressively, it maintains 81.06% capacity even after 3000 charge-discharge cycles. Dynamic process analysis reveals that this superior rate performance is attributed to a larger interlayer spacing facilitating ion transport comparing with the original graphite, disordered amorphous carbon for additional lithium storage sites, and crystalized carbon for enhanced charge transfer. The dual-shock chemical approach offers a cost-effective and efficient method to rapidly produce hybrid-structured carbon anodes, enabling 10C fast charging capabilities in lithium-ion batteries.