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피인용 0
초록·키워드
Purpose: An ideal sulfur-supporting material for lithium-sulfur (Li-S) batteries would exhibit both minimal volume expansion and high electrical conductivity because these properties are essential for improving cycling stability, and enable implementation in large-scale applications.
Methods: In this work, we developed TiO₂ quantum dots on Ti₃C₂ (QDs TiO₂-Ti₃C₂) MXene nanosheets using a simple hydrothermal synthesis. The sulfur was loaded in the QDs TiO₂-Ti3C₂ MXene via a simple melt-diffusion method.
Results: The TiO₂ quantum dots increased the interlayer space and prevented restacking of the MXene nanosheets. The QDs TiO₂-Ti₃C₂@S electrode showed a higher initial capacity at a C-rate of 0.5, 921.6 mAh/g, compared with the corresponding value for the Ti₃C₂@S (499.0 mAh/g). Moreover, the QDs TiO₂-Ti₃C₂@S electrode demonstrated excellent cyclic stability, retaining a capacity of 342.7 mAh/g after 150 cycles.
Conclusion: The QDs TiO₂-Ti₃C₂@S electrode showed significantly enhanced long-term cyclability and rate capability, demonstrating a new prospect for the development of rapid and stable Li-S batteries.
Methods: In this work, we developed TiO₂ quantum dots on Ti₃C₂ (QDs TiO₂-Ti₃C₂) MXene nanosheets using a simple hydrothermal synthesis. The sulfur was loaded in the QDs TiO₂-Ti3C₂ MXene via a simple melt-diffusion method.
Results: The TiO₂ quantum dots increased the interlayer space and prevented restacking of the MXene nanosheets. The QDs TiO₂-Ti₃C₂@S electrode showed a higher initial capacity at a C-rate of 0.5, 921.6 mAh/g, compared with the corresponding value for the Ti₃C₂@S (499.0 mAh/g). Moreover, the QDs TiO₂-Ti₃C₂@S electrode demonstrated excellent cyclic stability, retaining a capacity of 342.7 mAh/g after 150 cycles.
Conclusion: The QDs TiO₂-Ti₃C₂@S electrode showed significantly enhanced long-term cyclability and rate capability, demonstrating a new prospect for the development of rapid and stable Li-S batteries.
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UCI(KEPA) : I410-151-25-02-091261932
