Fast Charging & Extreme Fast Charging
Pages 630–631 (2 pages)
Text on page 631
Fast Charging and Extreme Fast Charging
Laser Ablation, Carbon Nanotubes and SEI Modification via Customized Formation Laser ablation of graphite anode and incorporation of carbon nanotubes CNTs in NMC811 cathode improves charge acceptance under 1015 minute fast charge.
Graphite laser ablation enhances Li+ ionic transport through lowered tortuosity and improved wetting. Using CNTs in NMC811 composite cathode improves electronic conductivity and mechanical rigidity. GRAPHITE 12% LASER ABLATION
5C CCCV CHARGE ACCEPTANCE
Source: G. Veennam, A. Singh, A. R. Dunlop et al., S. Wu, Y. Zhang, H. Liang et al.
Custom formation cycling of graphite between 1.05V 2V including potentiostatic holds promotes formation of inner LiF rich bilayer SEI for enhanced Li+ transport and mechanical rigidity preventing dendrites.
Preferential LiPF6 salt decomposition is favored at high potentials in custom formation protocol forming layered SEI. Solvent decomposition is favored under traditional formation protocol for mosaic-like SEI. 5C CYCLE LIFE PERFORMANCE
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