CHẾ TẠO VẬT LIỆU ĐIỆN CỰC DƯƠNG (NH4)0,5V2O5 DẠNG THANH ĐỊNH HƯỚNG ỨNG DỤNG CHO ĐIỆN CỰC DƯƠNG TRONG ẮC QUY NATRI – ION

Tóm tắt

Sodium-ion batteries (SIBs) have gathered considerable attention as a potential alternative to lithium-ion
batteries (LIBs), due to their abundant sodium resources, cost-effectiveness, and safety. However, a
significant challenge in SIBs development lies in identifying high-performance cathode materials with
exceptional rate capability and long-term cycling stability. This work explores the potential of (NH4)0.5V2O5
as a promising cathode candidate for SIBs. The layered structural (NH4)0.5V2O5 was synthesized by
hydrothermal method with the precursors V2O5, NH3 solution and HCOOH at 200oC for 24 hours. The
structural and morphological properties were investigated by X-ray diffraction (XRD), scanning electron
microscopy (SEM) and Raman scattering spectroscopy. (NH4)0.5V2O5 demonstrated reversible intercalation
of Na+
ion with a specific capacity of 95 mAh.g-1
at rate C/5 in potential 1.5-4 V (vs. Na+
/Na) thus
highlighting its potential as a high-performance SIBs cathode material.