Zhang Qiaobao, Chen Huixin, Wang Jiexi, Xu Daguo, Li Xinhai, Yang Yong, Zhang Kaili
Department of Mechanical and Biomedical Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong.
ChemSusChem. 2014 Aug;7(8):2325-34. doi: 10.1002/cssc.201402039. Epub 2014 May 14.
We demonstrate the facile and well-controlled design and fabrication of heterostructured and hierarchical 3D mesoporous NiSix /NiCo2 O4 core/shell nanowire arrays on nickel foam through a facile chemical vapor deposition (CVD) technique combined with a simple but powerful chemical bath deposition (CBD) technique. The smart hybridization of NiCo2 O4 and NiSix nanostructures results in an intriguing mesoporous hierarchical core/shell nanowire-array architecture. The nanowire arrays demonstrate enhanced electrochemical performance as binder- and conductive-agent-free electrodes for lithium ion batteries (LIBs) with excellent capacity retention and high rate capability on cycling. The electrodes can maintain a high reversible capacity of 1693 mA h g(-1) after 50 cycles at 20 mA g(-1) . Given the outstanding performance and simple, efficient, cost-effective fabrication, we believe that these 3D NiSix /NiCo2 O4 core/shell heterostructured arrays have great potential application in high-performance LIBs.
我们通过简便的化学气相沉积（CVD）技术与简单而有效的化学浴沉积（CBD）技术相结合，展示了在泡沫镍上轻松且可控地设计和制造异质结构及分级三维介孔NiSix /NiCo2 O4核壳纳米线阵列的方法。NiCo2 O4和NiSix纳米结构的巧妙杂化形成了一种引人入胜的介孔分级核壳纳米线阵列结构。作为锂离子电池（LIBs）的无粘结剂和无导电剂电极，该纳米线阵列表现出增强的电化学性能，在循环过程中具有出色的容量保持率和高倍率性能。在20 mA g(-1) 下循环50次后，电极可保持1693 mA h g(-1) 的高可逆容量。鉴于其出色的性能以及简单、高效、经济高效的制造方法，我们相信这些三维NiSix /NiCo2 O4核壳异质结构阵列在高性能LIBs中具有巨大的潜在应用价值。
