Ziyu Feng

Rational Quantification of Deep Sodium Reversibility with a Utilization-Corrected N/P Descriptor toward Low-N/P-Ratio Solid-State Na–S Batteries

Abstract Solid-state Na–S batteries offer high energy density, yet their practicality deteriorates at low N/P ratios because limited Na inventory cannot compensate for irreversible loss. Under lean-Na conditions, the key issue is whether the restricted Na reservoir remains revers...