Covalent Assembly of MoS2 Nanosheets with SnS Nanodots as Linkages for Lithium/Sodium-Ion Batteries.,Angewandte Chemie International Edition

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Covalent Assembly of MoS2 Nanosheets with SnS Nanodots as Linkages for Lithium/Sodium-Ion Batteries.
Angewandte Chemie International Edition ( IF 16.1 ) Pub Date : 2020-05-26 , DOI: 10.1002/anie.202005840
Jiajia Ru _{1,

2} , Ting He _{2,

3} , Binjie Chen ₁ , Yutong Feng ₁ , Lianhai Zu ₁ , Zhijun Wang ₄ , Qiaobao Zhang ₅ , Tianzi Hao ₁ , Ruijin Meng ₁ , Renchao Che ₆ , Chi Zhang _{1,

2} , Jinhu Yang _{1,

2}

Affiliation

Weak van der Waals interactions between interlayers of two‐dimensional layered materials result in disabled across‐interlayer electron transfer and poor layered structural stability, seriously deteriorating their performance in energy applications. Herein, we propose a novel covalent assembly strategy for MoS₂ nanosheets to realize unique MoS₂/SnS hollow superassemblies (HSs) by using SnS nanodots as covalent linkages. The covalent assembly based on all‐inorganic and carbon‐free concept enables effective across‐interlayer electron transfer, facilitated ion diffusion kinetics, and outstanding mechanical stability, which are evidenced by experimental characterization, DFT calculations, and mechanical simulations. Consequently, the MoS₂/SnS HSs exhibit superb rate performance and long cycling stability in lithium‐ion batteries, representing the best comprehensive performance in carbon‐free MoS₂‐based anodes to date. Moreover, the MoS₂/SnS HSs also show excellent sodium storage performance in sodium‐ion batteries.

中文翻译：

MoS2纳米片与SnS纳米点的共价组装，作为锂/钠离子电池的链接。

二维层状材料的中间层之间的弱范德华相互作用弱化了跨层电子的传输和较差的层状结构稳定性，从而严重降低了它们在能源应用中的性能。在这里，我们提出了一种新颖的MoS ₂纳米片共价组装策略，以利用SnS纳米点作为共价键实现独特的MoS ₂ / SnS空心超组装（HSs）。基于全无机和无碳概念的共价组装可实现有效的跨层电子转移，促进的离子扩散动力学和出色的机械稳定性，这通过实验表征，DFT计算和机械模拟得以证明。因此，MoS ₂/ SnS HS在锂离子电池中表现出极好的速率性能和长循环稳定性，代表了迄今为止基于无碳MoS ₂的阳极最佳的综合性能。此外，MoS ₂ / SnS HSs在钠离子电池中也表现出出色的钠存储性能。

更新日期：2020-05-26

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