Publications by authors named "Jing-Ke Meng"
Article Synopsis
- - The study explores how a GeP/C composite electrode stores sodium, showing that metallic germanium (Ge) formed during discharge improves the electrode's electronic conductivity.
- - Sodium phosphide (NaP) helps prevent the clustering and expansion of Ge throughout the alloying process.
- - After recharging, the GeP phase is restored alongside elemental Ge and phosphorus (P), indicating that the phase transition of GeP is reversible during battery cycles.
Most P2-type layered oxides suffer from multiple voltage plateaus, due to Na/vacancy-order superstructures caused by strong interplay between Na-Na electrostatic interactions and charge ordering in the transition metal layers. Here, Mg ions are successfully introduced into Na sites in addition to the conventional transition metal sites in P2-type Na[MnNi]O as new cathode materials for sodium-ion batteries. Mg ions in the Na layer serve as "pillars" to stabilize the layered structure, especially for high-voltage charging, meanwhile Mg ions in the transition metal layer can destroy charge ordering.
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