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Architectural van der Waals Bi2S3/Bi2Se3 topological heterostructure as a superior potassium-ion storage material
Energy Storage Materials ( IF 18.9 ) Pub Date : 2022-07-16 , DOI: 10.1016/j.ensm.2022.07.020
Yi-Yen Hsieh , Hsing-Yu Tuan

We design a hexagram-like 1D/2D van der Waals heterostructure composed of regularly crosslinked aligned 1D Bi2S3 nanowires on 2D Bi2Se3 nanoplates, termed Bi2S3/Bi2Se3 vdWHs, for use as anode materials for potassium ion batteries (PIBs) and hybrid capacitors (PIHCs). Thanks to the mixed dimensional topological heterostructures, the abundant network-contacted heterojunctions facilitate ordered ion/electron transport around the surface network and interior topological materials, and simultaneously promoting the K+ diffusion, electron transfer, and electrolyte infiltration. The Bi2S3/Bi2Se3 vdWHs deliver an attractive specific capacity over 600 mA h g-1 at 50 mA g−1, a high-rate capability up to 2500 mA g−1, and excellent cycling stability. Theoretical models, in tandem with operando X-ray diffraction and HRTEM analysis reveal the behavior of heterogeneous interfacial reaction in terms of the trapping ability and diffusion kinetics, confirming the reversible conversion reaction of Bi2S3/Bi2Se3 vdWHs. Finally, the full cells of PIBs and PIHCs coupled with Bi2S3/Bi2Se3 vdWHs anodes exhibit excellent performances of 208 and 106 Wh kg−1 over 850 and 3000 cycles, respectively, demonstrating their feasibility towards practical applications. Our study provides a new insight into architectural strategies for heterogeneous interfaces to realize intelligent kinetic control strategies of chalcogenide topological materials for advanced energy storage.



中文翻译:

建筑范德华 Bi2S3/Bi2Se3 拓扑异质结构作为优良的钾离子存储材料

我们设计了一种六角形的 1D/2D 范德华异质结构,由 2D Bi 2 Se 3纳米板上的规则交联排列的 1D Bi 2 S 3纳米线组成,称为 Bi 2 S 3 /Bi 2 Se 3 vdWHs,用作阳极材料钾离子电池 (PIB) 和混合电容器 (PIHC)。由于混合维度的拓扑异质结构,丰富的网络接触异质结促进了表面网络和内部拓扑材料周围的有序离子/电子传输,同时促进了 K +扩散、电子转移和电解质渗透。Bi 2 S3 /Bi 2 Se 3 vdWH在 50 mA g -1时具有超过 600 mA hg -1的有吸引力的比容量、高达 2500 mA g -1的高倍率能力和出色的循环稳定性。理论模型与原位 X 射线衍射和 HRTEM 分析相结合,揭示了异相界面反应在捕获能力和扩散动力学方面的行为,证实了 Bi 2 S 3 /Bi 2 Se 3 vdWHs 的可逆转化反应。最后,PIBs 和 PIHCs 的全细胞与 Bi 2 S 3 /Bi 2 Se 3vdWHs 阳极在 850 和 3000 次循环中分别表现出 208 和 106 Wh kg -1的优异性能,证明了它们在实际应用中的可行性。我们的研究为异质界面的架构策略提供了新的见解,以实现用于先进储能的硫属化物拓扑材料的智能动力学控制策略。

更新日期:2022-07-21
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