Controlled synthesis of micro/nanostructured CuO anodes for lithium-ion batteries
Controlled synthesis of micro/nanostructured CuO anodes for lithium-ion batteries
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DOI：
10.1016/j.nanoen.2014.08.009
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发表时间：
2014-10-01
期刊：
影响因子：
17.6
通讯作者：
Wu, Gang
中科院分区：
文献类型：
--
作者：
Wang, Chen;Higgins, Drew;Wu, Gang
通过简单、环保的方法制备了三种不同形貌的可控氧化铜材料(多孔微球、花朵状和Thom状CuO)，并进一步研究了它们在锂离子电池负极上的电化学性能和性能。简单溶液化学法制备了CuO微球，而水热法制备了花状和刺状CuO结构，其结构转变分别是由于前驱体盐中氯离子或硫酸盐反离子的选择引起的。经400℃空气热处理后，X射线衍射仪(X射线衍射仪)显示出良好的物相纯度，并通过对中间物种结构和性能的系统研究，提出了各种材料的生长机理。研究了形状可控CuO材料的电化学性能和锂离子电池性能，阐明了CuO基负极的合成-结构-性能关系。研究发现，锂离子电池的性能高度依赖于CuO的形貌。在循环容量和倍率性能方面，CuO微球表现出比其他两个CuO样品更好的电化学性能，这表明了一种可行的策略来制备具有更高存储容量的下一代锂离子电池系统。(C)2014爱思唯尔有限公司。保留所有权利。
Three different morphology controlled copper oxide materials (porous microspheres, flower-like, and thom-like CuO) were prepared by facile and environmentally friendly processes, which were further investigated for their electrochemical properties and performance at lithium-ion battery anodes. CuO microspheres were prepared by simply solution chemistry, whereas flower-like and thorn-like CuO structures were prepared hydrothermally, with the structural transformations arising due to selection of chloride or sulfate counter ions in the precursor salts, respectively. After a 400 C heat treatment in air, the morphology controlled materials demonstrated excellent phase purity as indicated by X-ray diffraction (XRD), and we propose a growth mechanism for the various materials based on systematic investigation of the structure and properties of the intermediate species. The electrochemical and lithium-ion battery performance employing the shape controlled CuO materials was investigated, allowing for elucidation of the synthesis-structure-performance correlations of CuO-based anodes. The performance of lithium-ion batteries was found to be highly dependent on the CuO morphology. The CuO microspheres exhibit a superior electrochemical performance to the other two CuO samples in terms of cycle capacity and rate performance, indicating a viable strategy to prepare next-generation lithium-ion battery systems with improved storage capacities. (C) 2014 Elsevier Ltd. All rights reserved.