MoO_3–x nanobelts (MoO_3-x NBs) were synthesized via a novel “sauna reaction”, providing us an opportunity for illustrating the effect of oxygen vacancies (OVs) on its largely enhanced electrochemical performance. Very exciting, the MoO_3-x NBs exhibits much superior performance with 400 and 267mAhg⁻¹, which is about three times larger than that of the pristine MoO₃ NBs (123 and 84mAhg⁻¹), at the current densities of 100 and 200mAg⁻¹, respectively. Notably, the OVs and the resulting improved electrical conductivity could be used to account for their largely enhanced specific capacity and rate properties. On one hand, OVs lowered the energy barrier of Li⁺ into the intralyer of MoO₆ octahedron sheet layer and the interlayer of MoO_3-x, and provided extra lithium storage sites of MoO₃ during discharge-charge process. On the other hand, the improved conductivity of MoO_3-x provided efficient electron transport pathways. The results show that OVs control can be a promising strategy for enhancing high-performance Mo-based electrodes by taking advantage of structural characteristics of multiple oxide sates of Mo elements. This study not only provides a new method for the preparation of MoO_3-x with rich OVs using a simple, environmentally friendly “sauna reaction”, but also indicates the importance of OVs in the largely enhanced electrochemical performance in MoO_3-x NBs, which may shed some light on the future development of electrode materials of lithium-ion batteries (LIBs).

中文翻译：

---

通过“桑拿浴反应”形成的MoO3-x纳米带中的电化学性能大大提高：氧空位的重要性

MoO _3-x纳米带（MoO _3-x NBs）是通过一种新颖的“桑拿反应”合成的，这为我们提供了一个机会来说明氧空位（OVs）对其大大增强的电化学性能的影响。非常令人兴奋的是，在电流密度为100和200mAg的情况下，MoO _3-x NB在400和267mAhg ^-1时表现出优越的性能，是原始MoO ₃ NB（123和84mAhg ^-1）的三倍左右。^-1。值得注意的是，OV和所产生的改善的电导率可用于说明其大大提高的比容量和速率特性。一方面，OVs降低了Li的能垒⁺进入的MoO的intralyer ₆八面体片层和的MoO的夹层_3-X ，和的MoO的提供额外锂存储位点₃期间充放电过程。另一方面，提高的MoO _3-x电导率提供了有效的电子传输途径。结果表明，通过利用Mo元素的多个氧化物态的结构特征，OVs控制可以成为增强高性能Mo基电极的一种有前途的策略。该研究不仅为制备MoO _3-x提供了一种新方法。使用简单的，环境友好的“桑拿浴反应”富集了OV，但也表明了OV在MoO _3-x NBs的电化学性能大大提高中的重要性，这可能为锂离子电极材料的未来发展提供了一些启示电池（LIB）。