Electrochemical characterization of TiNb2O7 as anode material synthesized using microwave-assisted microemulsion route
Journal
Journal of the American Ceramic Society
Journal Volume
105
Journal Issue
12
Pages
7446
Date Issued
2022-12-01
Author(s)
Abstract
TiNb2O7 materials were synthesized via a microwave-assisted microemulsion technique and a conventional solid-state reaction route. Microwave-assisted microemulsion process produced TiNb2O7 powders with small particle sizes (50–100 nm) and increased surface area (22.4 m2/g) in comparison to the samples synthesized from solid-state method. Micelles in the microemulsion acted as nano-reactors and confined the grain growth of TiNb2O7. The microwave-assisted microemulsion-derived TiNb2O7 powders presented a high discharge capacity of 333.2 mAh/g at 0.1C. The materials also delivered 94.8% retention at 5C after 100 cycles. The solid-state derived samples only processed the 283.2-mAh/g discharge capacity at 0.1C with 83.2% retention at 5C after 100 cycles. The amended capacity and cyclability of microwave-assisted microemulsion-derived TiNb2O7 resulted from the augmented Li+ diffusion and the diminished charge transfer resistance. It was also found that the microwave-assisted microemulsion-derived TiNb2O7 delivered 208 mAh/g discharge capacity at 10C, which was higher than solid-state derived samples (92 mAh/g). The improved capacity was owing to the enhancement in pseudocapacitive contribution. Present research indicated that the microwave-assisted microemulsion method effectively enhanced the electrochemical performance of TiNb2O7 powders.
Subjects
anode | capacity retention | discharge capacity | microemulsion | microwave
SDGs
Publisher
WILEY
Type
journal article