Atomic Interface Engineering and Electric‐Field Effect in Ultrathin Bi2MoO6 Nanosheets for Superior Lithium Ion Storage
Atomic Interface Engineering and Electric‐Field Effect in Ultrathin Bi2MoO6 Nanosheets for Superior Lithium Ion Storage
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DOI：
10.1002/adma.201700396
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发表时间：
2017-07
影响因子：
29.4
通讯作者：
Yang Zheng;Tengfei Zhou;Xudong Zhao;W. Pang;Hong Gao;Sean Li;Zhen Zhou;Huakun Liu;Zaiping Guo-Za
中科院分区：
文献类型：
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作者：
Yang Zheng;Tengfei Zhou;Xudong Zhao;W. Pang;Hong Gao;Sean Li;Zhen Zhou;Huakun Liu;Zaiping Guo-Za
超薄二维材料具有令人满意的电化学性能，为探索先进的储能系统提供了很好的机会。由于强大的层与层之间的相互作用，通过堆叠二维晶体来设计原子界面，在原子水平上调节材料特性具有巨大的潜力，从而实现前所未有的物理特性。在这项工作中，获得的原子薄Bi2MoO6薄片在锂离子电池中表现出显著的高倍率循环性能，这可以归因于层间耦合效应，以及二维构型和固有结构稳定性。晶体内部电荷分布不平衡，产生内建电场，显著增强锂离子转移动力学，而在开放表面产生的额外电荷传输通道进一步促进电荷传输。原位同步X射线粉末衍射结果证实了该材料具有优异的结构稳定性。这项工作为通过控制界面相互作用和电子结构来设计高性能的储能电极材料提供了一些见解。
Ultrathin 2D materials can offer promising opportunities for exploring advanced energy storage systems, with satisfactory electrochemical performance. Engineering atomic interfaces by stacking 2D crystals holds huge potential for tuning material properties at the atomic level, owing to the strong layer–layer interactions, enabling unprecedented physical properties. In this work, atomically thin Bi2MoO6 sheets are acquired that exhibit remarkable high‐rate cycling performance in Li‐ion batteries, which can be ascribed to the interlayer coupling effect, as well as the 2D configuration and intrinsic structural stability. The unbalanced charge distribution occurs within the crystal and induces built‐in electric fields, significantly boosting lithium ion transfer dynamics, while the extra charge transport channels generated on the open surfaces further promote charge transport. The in situ synchrotron X‐ray powder diffraction results confirm the material's excellent structural stability. This work provides some insights for designing high‐performance electrode materials for energy storage by manipulating the interface interaction and electronic structure.