Arrays of ultrafine CuS nanoneedles supported on a CNT backbone for application in supercapacitors
Xia, Bao Yu
Lou, David Xiong Wen
Date of Issue2012
School of Chemical and Biomedical Engineering
Energy Research Institute
Arrays of CuS ultrafine nanoneedles supported on a carbon nanotube (CNT) backbone (CNT@CuS) are fabricated by an efficient template-engaged chemical conversion route. First, the silica coated CNTs (CNT@SiO2) are introduced as the substrate for the growth of copper silicate (CuSilicate) nanoneedles to form CNT@SiO2@CuSilicate core–shell one-dimensional (1D) structures. In the second step, the CuSilicate nanoneedles are completely transformed into CuS nanoneedles via a hydrothermal treatment with Na2S. Simultaneously the intermediate silica layer is removed during the hydrothermal process, thus resulting in hierarchical CNT@CuS complex nanostructures. In virtue of the unique architecture and intrinsic properties, the as-prepared CNT@CuS hierarchical structures exhibit high capacitance and excellent cycling stability.
Journal of materials chemistry
© 2012 Royal Society of Chemistry.