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Multifunctional SnO2 QDs/MXene Heterostructures as Laminar Interlayers for Improved Polysulfide Conversion and Lithium Plating Behavior
Nano-Micro Letters ( IF 31.6 ) Pub Date : 2024-06-28 , DOI: 10.1007/s40820-024-01446-w
Shungui Deng , Weiwei Sun , Jiawei Tang , Mohammad Jafarpour , Frank Nüesch , Jakob Heier , Chuanfang Zhang

  • The interfacing between SnO2 and MXene alters electronic structures, shifting the d-band center in transition metals, enhancing catalytic efficiency by reducing electron filling in antibonding orbitals.

  • A binder-free, ultrathin, laminar heterostructured interlayer on polypropylene separator is demonstrated. The ionic sieving mechanism and efficient adsorption–catalysis process enable deeper charge/discharge cycle and improved stability.

  • The improved catalytic conversion and suppressed lithium dendrites formation enable a high loading of 7.5 mg cm−2 and an initial area capacity of 7.6 mAh cm−2.



中文翻译:


多功能 SnO2 QDs/MXene 异质结构作为层状中间层,可改善多硫化物转化和镀锂行为



  • SnO 2 和 MXene 之间的界面改变了电子结构,移动了过渡金属中的 d 带中心,通过减少反键轨道中的电子填充来提高催化效率。


  • 展示了聚丙烯隔膜上的无粘合剂、超薄层状异质结构夹层。离子筛分机制和高效的吸附催化过程可实现更深的充电/放电循环并提高稳定性。


  • 改进的催化转化率和抑制的锂枝晶形成实现了 7.5 mg cm −2 的高负载量和 7.6 mAh cm −2 的初始面积容量。

更新日期:2024-06-28
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