Abstract
Germanium boasts a high charge capacity, but it has detrimental effects on battery cycling life, owing to the significant volume expansion that it incurs after repeated recharging. Therefore, the fabrication of Ge composites including other elements is essential to overcome this hurdle. Herein, highly conductive Te is employed to prepare an alloy of germanium telluride (GeTe) with the addition of a highly conductive matrix comprising titanium carbide (TiC) and carbon (C) via high-energy ball milling (HEBM). The final alloy composite, GeTe-TiC-C, is used as a potential anode for lithium-ion cells. The GeTe-TiC-C composites having different combinations of TiC are characterized by electron microscopies and X-ray powder diffraction for structural and morphological analyses, which indicate that GeTe and TiC are evenly spread out in the carbon matrix. The GeTe electrode exhibits an unstable cycling life; however, the addition of higher amounts of TiC in GeTe offers much better electrochemical performance. Specifically, the GeTe-TiC (20%)-C and GeTe-TiC (30%)-C electrodes exhibited excellent reversible cyclability equivalent to 847 and 614 mAh g−1 after 400 cycles, respectively. Moreover, at 10 A g−1, stable capacity retentions of 78% for GeTe-TiC (20%)-C and 82% for GeTe-TiC (30%)-C were demonstrated. This proves that the developed GeTe-TiC-C anodes are promising for potential applications as anode candidates for high-performance lithium-ion batteries.
Highlights
In recent times, the number of customers interested in purchasing electric vehicles and electronic devices is steadily increasing, and these products demand long-lasting energy storage systems
The synthesized germanium telluride (GeTe) and titanium carbide (TiC) were mixed with acetylene black and prepared and prepared with different wt % ratios (GeTe:TiC:C = 70:10:20, 60:20:20, and 50:30:20) in a container with different wt % ratios (GeTe:TiC:C = 70:10:20, 60:20:20, and 50:30:20) in a container sealed with Ar with Ar gas
The GeTe and GeTe-TiC-C powder samples are evaluated by X-ray diffraction (XRD), and Figure 2 shows the XRD peaks of the as-prepared composites
Summary
The number of customers interested in purchasing electric vehicles and electronic devices is steadily increasing, and these products demand long-lasting energy storage systems. Due to the specific properties of TiC, various studies on for reducing the large volume expansion of the metallic Ge, intermetallic components that act as a the electrodes with TiC and/or C have been explored, where the addition of TiC to the composite buffering step could be into performances composite electrodes This purpose, the chalcogens of electrodes made it possible to incorporated show stable cyclic [23,33,34,35,36,37].For. In addition, conductive sulfur (S), selenium (Se), and tellurium are potential candidatesand anditcan be alloyed carbon can enhance nanoparticle separation and (Te) the conductivity of composites, can stabilizewith Li upon the. The fabricated composite electrode is expected to demonstrate superior electrochemical performance
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