Charge Storage Mechanism of LixWO3 Hexagonal Tungsten Bronze in Aqueous Electrolytes - Archive ouverte HAL Access content directly
Journal Articles Batteries Year : 2023

Charge Storage Mechanism of LixWO3 Hexagonal Tungsten Bronze in Aqueous Electrolytes

Eric Quarez

Abstract

The electrochemical behavior of the lithium hexagonal tungsten bronze, LixWO3, is investigated herein. The material was synthesized at a low temperature under hydrothermal conditions, yielding nanorod-like particles with growth along the c-axis. Upon cycling in a 5 M LiNO3 aqueous electrolyte, a specific capacity of 71 C.g−1 was obtained at 2 mV.s−1, corresponding to a charge/discharge cycle of 10 min. The charge storage mechanism was elucidated using various complementary techniques, such as electrochemical quartz crystal microbalance (EQCM) and synchrotron operando X-ray absorption spectroscopy (XAS). A desolvation process upon Li+ intercalation into the lattice of the material was evidenced, accompanied by a reversible reduction/oxidation of tungsten cations in the crystal structure upon charge/discharge cycling.
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hal-04044994 , version 1 (24-03-2023)

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Julio César Espinosa-Angeles, Eric Quarez, Louis-Béni Mvele Eyé’a, Camille Douard, Antonella Iadecola, et al.. Charge Storage Mechanism of LixWO3 Hexagonal Tungsten Bronze in Aqueous Electrolytes. Batteries, 2023, 9 (2), pp.136. ⟨10.3390/batteries9020136⟩. ⟨hal-04044994⟩
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