Boron Oxide Enhancing Stability of MoS2 Anode Materials for Lithium-Ion Batteries

Gallium-Telluride-Based Composite as Promising Lithium Storage Material

Various applications of gallium telluride have been investigated, such as in optoelectronic devices, radiation detectors, solar cells, and semiconductors, owing to its unique electronic, mechanical, and structural properties. Among the various forms of gallium telluride (e.g., GaTe, Ga₃Te₄, Ga₂Te₃, and Ga₂Te₅), we propose a gallium (III) telluride (Ga₂Te₃)-based composite (Ga₂Te₃-TiO₂-C) as a prospective anode for Li-ion batteries (LIBs). The lithiation/delithiation phase change mechanism of Ga₂Te₃ was examined. The existence of the TiO₂-C hybrid buffering matrix improved the electrical conductivity as well as mechanical integrity of the composite anode for LIBs. Furthermore, the impact of the C concentration on the performance of Ga₂Te₃-TiO₂-C was comprehensively studied through cyclic voltammetry, differential capacity analysis, and electrochemical impedance spectroscopy. The Ga₂Te₃-TiO₂-C electrode showed high rate capability (capacity retention of 96% at 10 A g^-1 relative to 0.1 A g^-1) as well as high reversible specific capacity (769 mAh g^-1 after 300 cycles at 100 mA g^-1). The capacity of Ga₂Te₃-TiO₂-C was enhanced by the synergistic interaction of TiO₂ and amorphous C. It thereby outperformed the majority of the most recent Ga-based LIB electrodes. Thus, Ga₂Te₃-TiO₂-C can be thought of as a prospective anode for LIBs in the future.

Ga2Te3-Based Composite Anodes for High-Performance Sodium-Ion Batteries

Recently, metal chalcogenides have received considerable attention as prospective anode materials for sodium-ion batteries (SIBs) because of their high theoretical capacities based on their alloying or conversion reactions. Herein, we demonstrate a gallium(III) telluride (Ga₂Te₃)-based ternary composite (Ga₂Te₃-TiO₂-C) synthesized via a simple high-energy ball mill as a great candidate SIB anode material for the first time. The electrochemical performance, as well as the phase transition mechanism of Ga₂Te₃ during sodiation/desodiation, is investigated. Furthermore, the effect of C content on the performance of Ga₂Te₃-TiO₂-C is studied using various electrochemical analyses. As a result, Ga₂Te₃-TiO₂-C with an optimum carbon content of 10% (Ga₂Te₃-TiO₂-C(10%)) exhibited a specific capacity of 437 mAh·g^-1 after 300 cycles at 100 mA·g^-1 and a high-rate capability (capacity retention of 96% at 10 A·g^-1 relative to 0.1 A·g^-1). The good electrochemical properties of Ga₂Te₃-TiO₂-C(10%) benefited from the presence of the TiO₂-C hybrid buffering matrix, which improved the mechanical integrity and electrical conductivity of the electrode. This research opens a new direction for the improvement of high-performance advanced SIB anodes with a simple synthesis process.