Structural d002 degeneracy and closed pore collapse lower hard carbon plateau capacity and initial coulombic efficiency, requiring tight kiln thermal controls and compaction limits.
Precise pyrolysis temperature control between 1200°C and 1300°C optimizes hard carbon d002 spacing to 0.37-0.38 nm, maximizing reversible plateau capacity.
Controlling pitch air-oxidation at 260°C yields oxygen uptake above 8 percent, preventing mesophase growth and maximizing sodium storage plateau capacity.
Controlled oxidative cross-linking of pitch precursors balances carbon yield and closed porosity to optimize hard carbon capacity and initial coulombic efficiency.
Precise acid leaching parameters control biomass ash removal, protecting hard carbon pore structures and initial coulombic efficiency.
Continuous pyrolysis delivers lower manufacturing costs and stable hard carbon yields, whereas chemical pre-sodiation boosts efficiency at higher scrap and reagent expenses.
Controlling rotary kiln pyrolysis kinetics optimizes hard carbon interlayer spacing and closed porosity, raising sodium-ion anode initial coulombic efficiency.
Optimize precursor pre-oxidation at 230-270 °C under 0.05 atm O2 to expand closed pore volume, achieving >220 mAh/g low-potential plateau capacity and >88% ICE.
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