SnO2 Quantum Dots Distributed along V2O5 Nanobelts for Utilization as a High-Capacity Storage Hybrid Material in Li-Ion Batteries

I Neelakanta Reddy; Bhargav Akkinepally; Venkatesu Manjunath; Gaddam Neelima; Mogalahalli V Reddy; Jaesool Shim

doi:10.3390/molecules26237262

SnO₂ Quantum Dots Distributed along V₂O₅ Nanobelts for Utilization as a High-Capacity Storage Hybrid Material in Li-Ion Batteries

Molecules. 2021 Nov 30;26(23):7262. doi: 10.3390/molecules26237262.

Authors

I Neelakanta Reddy¹, Bhargav Akkinepally¹, Venkatesu Manjunath², Gaddam Neelima³, Mogalahalli V Reddy⁴, Jaesool Shim¹

Affiliations

¹ School of Mechanical Engineering, Yeungnam University, Gyeongsan 38541, Korea.
² Department of Physics, Sri Padmavati Mahila Visvavidyalayam, Tirupati 517502, India.
³ Department of Physics, National Taiwan University, Taipei 10617, Taiwan.
⁴ Nouveau Monde Graphite, Saint Michel Des Saints, QC J0K 3B0, Canada.

Abstract

In this study, the facile synthesis of SnO₂ quantum dot (QD)-garnished V₂O₅ nanobelts exhibiting significantly enhanced reversible capacity and outstanding cyclic stability for Li⁺ storage was achieved. Electrochemical impedance analysis revealed strong charge transfer kinetics related to that of V₂O₅ nanobelts. The SnO₂ QD-garnished V₂O₅ nanobelts exhibited the highest discharge capacity of ca. 760 mAhg^-1 at a density of 441 mAg^-1 between the voltage ranges of 0.0 to 3.0 V, while the pristine V₂O₅ nanobelts samples recorded a discharge capacity of ca. 403 mAhg^-1. The high capacity of QD-garnished nanobelts was achieved as an outcome of their huge surface area of 50.49 m²g^-1 and improved electronic conductivity. Therefore, the as-presented SnO₂ QD-garnished V₂O₅ nanobelts synthesis strategy could produce an ideal material for application in high-performance Li-ion batteries.

Keywords: Li-ion battery; V2O5/SnO2 nanostructures; energy storage; high specific capacity.

Grants and funding

2020R1A4A1019227, and 2020R1A2C1012439/National Research Foundation of Korea