Tuning architectural synergy reactivity of nano-tin oxide on high storage reversible capacity retention of ammonium vanadate nanobelt array cathode for lithium-ion battery
Rozita Monsef, Masoud Salavati‐Niasari
Abstract
Enabling ambient cycling stability of vanadium-based materials is of fundamental importance in the advancement of next generation electrodes for high-performance lithium-ion batteries. Although, extending these host layered nano-architectures illustrate the effective electrochemical activity by regulating the gallery space for fast Li + storage, the reported structural integrity in terms of the cycling stability for vanadium-based cathodes is highly challenging. In present study, a series of NH 4 V 4 O 10 -SnO 2 (NHV-SnO 2 ) nanocomposite consisting of diverse contents of SnO 2 (x: 5.0, 15.0 and 30.0 wt%) were synthesized through a three-step program based on sonochemical-calcination-hydrothermal treatment and employed as an advanced energetic material for lithium-ion battery cathodes. For the first time, understanding the impact of SnO 2 loading on electrochemical reactions of NHV-based electrodes was regarded as an effective engineering strategy to optimize structural modulation and cell lifetime without distinct capacity fading. Notably, combination of NHV and SnO 2 in optimum proportions not only enhances the specific surface area, but also expand buffer the volume change for lithium-ion intercalation/extraction. By this design, the assembled battery containing 15.0 wt% SnO 2 illustrated stable capacities of 301.77 mAh g −1 (30 mA g −1 ) and 232.05 mAh g −1 (240 mA g −1 ) with capacity retention values as high as 97.94 % and 97.03 % for 50 cycles, respectively. Of note, the results described here could show a vital guidance toward designing better composite-based cathode material for energy storage devices.