Na₃V₂(PO₄)₃─A Highly Promising Anode and Cathode Material for Sodium-Ion Batteries

Abstract

Sodium-ion batteries may develop into a cost-efficient alternative to lithium-ion batteries. Na3V2(PO4)3/C (NVP/C) is known to be a suitable electrode material for such batteries that can be used as an anode or cathode. Here, NVP/C-based electrodes were investigated in different cell configurations. The electrodes were cycled against the anode materials hard carbon, Sb/C, SnSb/C, and sodium metal. Furthermore, NVP versus NVP was investigated. When NVP/C is cycled against the other anode materials, the cells exhibit relatively poor reliability, but in NVP–NVP cells, a high cycling stability was observed and more than 1500 cycles with a capacity retention of 80% were achieved. This work demonstrates that common problems of Na and Na-ion cells result from the anode materials used and that NVP/C itself is very reliable both as an anode and cathode material.

Decorating Lithium Titanium-Phosphate Carbon Layers with Mo2C as Efficient Li-Ion Storage Electrode

“…With the increase of cycle number, the oxidation and reduction peak area are symmetrical, and the ΔE becomes small, which indicates that the composites would have better electrochemical performance initially without activation. 46 The most obvious redox peaks located at 2.41/2.54 V are attributed to the redox reaction of the Ti 4+ /Ti 3+ redox couple in LNC@M, corresponding to the Li + embedding/de-embedding process during the transformation of the LiTi 2 (PO 4 ) 3 phase and Li 3 Ti 2 (PO 4 ) 3 phase. 47 The tangential method was used to find the corresponding detailed redox peak current and ΔE values in Table S1.…”

“…The shape and position of the peaks remained similar, indicating that the electrochemical reversibility of LNC@M is outstanding. With the increase of cycle number, the oxidation and reduction peak area are symmetrical, and the Δ E becomes small, which indicates that the composites would have better electrochemical performance initially without activation . The most obvious redox peaks located at 2.41/2.54 V are attributed to the redox reaction of the Ti 4+ /Ti 3+ redox couple in LNC@M, corresponding to the Li + embedding/de-embedding process during the transformation of the LiTi 2 (PO 4 ) 3 phase and Li 3 Ti 2 (PO 4 ) 3 phase .…”

A g-C3N4/PVDF-based composite polymer electrolytes for sodium-ion battery

“…The feasibility of PVDF-HFP/g-C 3 N 4 /NaClO 4 CSE in solid-state sodium metal batteries was investigated using coin cells assembled with Na metal anodes and Na 3 V 2 (PO 4 ) 3 (NVP) cathode (Na|CSPE|NVP) [28][29][30]. At the same current density of 0.1 C, the Na|PVDF-HFP/g-C 3 N 4 /NaClO 4 |NVP cell exhibits higher speci c capacity of 100.3 mAh g -1 than that of Na|PVDF-HFP/NaClO 4 |NVP cell (81.5 mAh g -1 ) (Fig.…”

Prospective Sustainability Screening of Sodium‐Ion Battery Cathode Materials

“…[26,27] While the former two characteristics convert them into promising CAM, research is ongoing to overcome the drawback of the low conductivity by applying various strategies such as carbon coating, reducing particle size, or designing the optimal particle morphology. [28][29][30][31][32] A second group of polyanionic CAM is the Prussian Blue Analogues (PBA) with the general chemical formula Na 2−x TM a [TM b (CN) 6 ] 1−y zH 2 O. These can be synthesized at low temperatures [33] and rely on typically abundant materials.…”