Journal
JOURNAL OF SOLID STATE CHEMISTRY
Volume 330, Issue -, Pages -Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jssc.2023.124444
Keywords
Wadsley-Roth phase; Microwave synthesis; Anode material; Particle downsizing
Ask authors/readers for more resources
In this study, FeNb11O29 powder samples were prepared using a microwave-assisted solid-state synthesis method for the first time. The samples obtained rapidly from submicrometric oxide precursors showed enhanced cycling performance, possibly due to the easier ionic diffusion occurring in the smaller particles.
Wadsley-Roth oxide FeNb11O29 powder samples are successfully prepared using a simple, cost-effective, and ultrafast microwave-assisted solid-state synthesis for the first time. While conventional solid-state route in furnace requires hours of high-temperature treatment, both monoclinic and orthorhombic polymorphs of FeNb11O29 were obtained in minutes under microwave heating. Combining such short heat treatment with submicrometric oxide precursors enables to limit particle growth during the synthesis. The electrochemical benchmark clearly shows that FeNb11O29 powder samples obtained rapidly from submicrometric oxide precursors exhibit enhanced cycling performance. For example, the monoclinic polymorph prepared in only 5 min offers a high capacity of 179 mAh g-1 (90 % retention) after 500 cycles at 2 A g-1, approximately 20 % more than with conventional synthesis protocol. Electrochemical analysis demonstrates that the extra capacity is gained at low voltage and is probably induced by an easier ionic diffusion occurring in smaller particles. This work confirms the interest of solid-state microwave heating to design of electrode materials with limited particle growth and better cycling performance.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available