Na₃V₂(PO₄)₃ particles partly embedded in carbon nanofibers with superb kinetics for ultra-high power sodium ion batteries

Abstract

Na3V2(PO4)3 particles partly embedded in carbon nanofibers enabled fast electronic conduction as well as facile Na ion migration simultaneously. As a result, the composite showed excellent electrochemical properties as a cathode material for sodium ion batteries.

Tuned In Situ Growth of Nanolayered rGO on 3D Na3V2(PO4)3 Matrices: A Step toward Long Lasting, High Power Na‐Ion Batteries

“…We have noted that both of these literatures (Table S1, Supporting Information) exhibit a cycle life of few thousands of cycles at ≥85% capacity retention in reality. Table S1 in the Supporting Information also provides the comparison of the present work with the recent literatures (since 2013) and evaluates the cycling stability at ≥85% capacity retention . These observations confirm that there is further scope to improve the rate capability and cycling performance by devising new nanostructured architectures for SVP/C composites.…”

Hierarchical Carbon Framework Wrapped Na3V2(PO4)3 as a Superior High‐Rate and Extended Lifespan Cathode for Sodium‐Ion Batteries

“…In this regard, various cathode materials, such as metal oxides, phosphates, and ferrocyanides have been investigated but their performances still fall short for EES applications. Na 3 V 2 (PO 4 ) 3 , with a fast Na + ‐transportable NASICON framework, has attracted ubiquitous attention as a promising cathode material for SIBs . Yamaki and co‐workers first reported a reversible capacity of 140 mA h g −1 of Na 3 V 2 (PO 4 ) 3 in the voltage range of 1.2–3.5 V .…”

“…Recently, Jian et al introduced a carbon‐coating technique to improve the electric conductivity as well as cycling capability of Na 3 V 2 (PO 4 ) 3 . Promising results have ignited tremendous efforts to further advance the performance of Na 3 V 2 (PO 4 ) 3 by particle‐downsizing, which shortens transport distances of both Na ions and electrons, and surface‐coating of conductive carbon . Saravanan et al reported a porous Na 3 V 2 (PO 4 ) 3 /C composite characterized with an ultra‐long cycle life of 30 000 cycles at 40 C (4.7 A g −1 at a capacity of 61 mA h g −1 ) and a capacity retention of 50% .…”

3D Interconnected Carbon Fiber Network‐Enabled Ultralong Life Na3V2(PO4)3@Carbon Paper Cathode for Sodium‐Ion Batteries

“…The particle size needs to be carefully designed for optimal chemical diffusion inside the particle (nanoparticle size scales are needed when a material is a poor conductor). In recently published reports, various kinds of carbon coatings are applied as a conducting network to improve electron transport and this may be in the form of carbon nanotubes/nanofibers/nanorods and/or graphene . Very recently, 3D interconnected conducting network strategies, which utilize a combination of different carbons have been investigated but only one publication on Na 3 V 2 (PO 4 ) 3 to date has explored the possibilities of a free‐standing electrode design …”