Hosseinpour Zahra, Scarpellini Alice, Najafishirtari Sharif, Marras Sergio, Colombo Massimo, Alemi Abdolali, De Volder Michaël, George Chandramohan, Lesnyak Vladimir
Nanochemistry Department, Istituto Italiano di Tecnologia, Via Morego, 30, 16163, Genoa, Italy.
Department of Inorganic Chemistry, Faculty of Chemistry, University of Tabriz, Bolvar 29 Bahman, Tabriz, Iran.
Chemphyschem. 2015 Nov 16;16(16):3418-24. doi: 10.1002/cphc.201500568. Epub 2015 Sep 8.
Hierarchical superstructures formed by self-assembled nanoparticles exhibit interesting electrochemical properties that can potentially be exploited in Li-ion batteries (LIBs) as possible electrode materials. In this work, we tested two different morphologies of CuS superstructures for electrodes, namely, tubular dandelion-like and ball-like assemblies, both of which are composed of similar small covellite nanoparticles. These two CuS morphologies are characterized by their markedly different electrochemical performances, suggesting that their complex structures/morphologies influence the electrochemical properties. At 1.12 A g(-1), the cells made with CuS tubular structures delivered about 420 mAh g(-1), and at 0.56 A g(-1), the capacity was as high as about 500 mAh g(-1) with good capacity retention. Their ease of preparation and processing, together with good electrochemical performance, make CuS tubular dandelion-like clusters attractive for developing low-cost LIBs based on conversion reactions.
由自组装纳米颗粒形成的分层超结构展现出有趣的电化学性质，这些性质有可能在锂离子电池（LIBs）中作为潜在的电极材料加以利用。在这项工作中，我们测试了两种不同形态的硫化铜（CuS）超结构作为电极，即管状蒲公英状和球状组装体，它们均由相似的小硫铜钴矿纳米颗粒组成。这两种CuS形态的特征在于其显著不同的电化学性能，这表明它们复杂的结构/形态会影响电化学性质。在1.12 A g⁻¹时，由CuS管状结构制成的电池提供约420 mAh g⁻¹的电量，而在0.56 A g⁻¹时，容量高达约500 mAh g⁻¹且具有良好的容量保持率。它们易于制备和加工，再加上良好的电化学性能，使得管状蒲公英状CuS簇对于开发基于转化反应的低成本LIBs具有吸引力。
