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Electrochemical Oscillation during Galvanostatic Charging of LiCrTiO₄ in Li-Ion Batteries.

ABSTRACT: In the late 1960s, the establishment of Prigogine's dissipative structure theory laid the foundation for the (electro)chemical oscillation phenomenon, which has been widely investigated in some electrochemical reactions, such as electro-catalysis and electro-deposition, while the electrochemical oscillation of Li-ion batteries has just been discovered in spinel Li₄Ti₅O₁₂ a few years before. In this work, spinel LiCrTiO₄ samples were synthesized by using a high-temperature solid-state method, characterized with SEM (Scanning electron microscope), XRD (X-ray diffraction), Raman and XPS (X-ray photoelectron spectroscopy) measurements, and electrochemically tested in Li-ion batteries to study the electrochemical oscillation. When sintering in a powder form at a temperature between 800 and 900 °C, we achieved the electrochemical oscillation of spinel LiCrTiO₄ during charging, and it is suppressed in the non-stoichiometric LiCrTiO₄ samples, especially for reducing the Li content or increasing the Cr content. Therefore, this work developed another two-phase material as the powder-sintered LiCrTiO₄ exhibiting the electrochemical oscillation in Li-ion batteries, which would inspire us to explore more two-phase electrode materials in Li-ion batteries, Na-ion batteries, etc.

SUBMITTER: Xu Z

PROVIDER: S-EPMC8269718 | biostudies-literature |

REPOSITORIES: biostudies-literature

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