Publications by authors named "Kexin Rao"
Article Synopsis
- NaMnZr(PO) has been a key material in sodium-ion battery research, known for its abundant manganese and high operating voltage, but faces challenges like poor conductivity and cycling performance due to the Jahn-Teller effect.
- A new ternary material, NaMnTiZr(PO)/C, is introduced that substitutes Ti for Zr, which lessens the Jahn-Teller effect and strengthens the crystal structure, improving stability.
- Tests show that this Ti substitution significantly enhances electronic conductivity and sodium ion diffusion, leading to better electrochemical performance, achieving a discharge capacity of 71.0 mAh/g and retaining 78.8% capacity after 1000 cycles.
NaFe(PO)(PO) is regarded as a promising cathode material for sodium-ion batteries due to its affordability, non-toxic nature, and excellent structural stability. However, its electrochemical performance is hampered by its poor electronic conductivity. Meanwhile, most of the previous studies utilized spray-drying and sol-gel methods to synthesize NaFe(PO)(PO), and the large-scale synthesis of the cathode material is still challenging.
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- * Traditional improvements to olivine FePO typically use organic solvents, making large-scale applications challenging; however, this study introduces a new water-based ion exchange method for creating Ni-doped, Mn-doped, and co-doped FePO@C.
- * The synthesized material, 0.2Mn0.1Ni-FP@C, showcases a discharge capacity of 154.4 mAh/g at a 0.1C rate and retains 70.7% of its capacity