Confined seeds derived SODIUM TITANATE (cas 120-34-3)/graphene composite with synergistic storage ability toward high performance sodium ion capacitors

Add time:09/03/2019    Source:sciencedirect.com

Sodium ion capacitors (SICs) are increasingly being focused, due to the feature of high energy/power densities derived from the integrated energy storage mechanisms, as well as the ubiquitous sodium sources. Practical anodes with exceptional rate capability can circumvent the kinetic mismatch with cathode, boosting energy/power metrics. Herein, a Na2Ti7O15 nanowire/graphene anode is synthesized through an atomic layer deposition (ALD) seeding technique, by which the confined seeds enable Na2Ti7O15 with ultra-high aspect ratio and interweaved structure with graphene nanosheets. The composite delivers a superior rate capability of 60 mAh g-1 at a high rate of 17.7 A g-1, and an exceptional cyclic stability of 90% retention after 10 000 cycles even at 8.85 A g-1. It is demonstrated that the morphology, graphene platform, intrinsically low energy diffusion barrier of Na2Ti7O15, and associated reaction mechanism synergize the electron transport, sodium ion migration, and surface capacitive contribution, giving rise to such a decent electrochemical performance. The SICs deliver high energy/power densities (82.7 Wh kg-1/97.5 W kg-1, 25 kW kg-1 with 16 Wh kg-1 retained), proving a promise particularly at extremely fast charge/discharge condition. The proposed ALD seeding technique can be developed into a technical strategy for synthesizing high performance energy storage materials.

We also recommend Trading Suppliers and Manufacturers of SODIUM TITANATE (cas 120-34-3). Pls Click Website Link as below: cas 120-34-3 suppliers

Prev:Regular ArticleSynthesis of hierarchical hollow SODIUM TITANATE (cas 120-34-3) microspheres and their application for selective removal of organic dyes
Next:Application of SODIUM TITANATE (cas 120-34-3) nanofibers as constructed wetland fillers for efficient removal of heavy metal ions from wastewater)