Enhanced electrochemical performance of Na3V2(PO4)2F3 for Na-ion batteries with nanostructure and carbon coating

Facile One-Step Hydrothermal Synthesis of Na3V2(PO4)2F3@C/CNTs Tetragonal Micro-Particles as High Performance Cathode Material for Na-Ion Batteries

“…Generally, NVPF materials are mainly synthesized by solid-state reaction method (Gover et al, 2006; Shakoor et al, 2012; Park et al, 2014), spray-drying method (Eshraghi et al, 2017; Shen et al, 2018), sol-gel method (Jiang et al, 2009; Pineda-Aguilar et al, 2017), and hydrothermal method (Serras et al, 2014; Cai et al, 2018; Guo et al, 2018), etc. In order to obtain a well-crystallized NVPF, most of the above mentioned methods usually require high temperature calcination processes (480–850°C).…”

Glycine-Nitrate Process for Synthesis of Na3V2(PO4)3 Cathode Material and Optimization of Glucose-Derived Hard Carbon Anode Material for Characterization in Full Cells

“…The fact that NVP-spray-3 and NVP-spray-2 show high capacities at 10 C can be attributed to increased carbon content in the electrode material. Firstly, 25 wt% of glucose was added to NVP-spray-2 precursor, which helps to form a carbon shell around the particles and therefore increases electronic conductivity of the material [31,35]. Secondly, some scaling effects seem to contribute to NVP-spray-3 having a higher capacity at 10 C than NVP-spray, even though no additional glucose was added to the precursor before the heat treatment step.…”

Effect of chelator content on the structural and electrochemical performance of Na3V2(PO4)2F3 by sol–gel preparation

“…19 Many strategies have been applied to improve the electronic conductivity such as designing NVPF/ carbon composites with amorphous carbon, carbon nanotubes or graphene, and shortening the electron transport distance by reducing the particle size to the nanoscale. [20][21][22][23][24][25] The sol-gel method is one of the most adopted ways to achieve both of the above-mentioned strategies. 26 Jiang et al first synthesized NVPF nanoparticles with a diameter of ∼20 nm embedded in an amorphous carbon network by the sol-gel method, exhibiting a much higher electronic conductivity of 1.0 × 10 −3 S cm −1 and a reversible discharge capacity of 117 mAh g −1 .…”