Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10268807 | Electrochimica Acta | 2011 | 6 Pages |
Abstract
Porous ZnO nanosheets are grown directly on copper substrates by a chemical bath deposition technique followed by a heat treatment. The materials are characterized by means of X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Their electrochemical properties as anodes of lithium ion batteries are examined by cyclic voltammetry (CV) and galvanostatic discharge-charge tests. The results show that porous ZnO nanosheets exhibit higher reversible capacities and better cyclabilities than those of commercial ZnO powders. When cycled at 0.05 A gâ1, these nanosheets deliver initial discharge and charge capacities of 1120 and 750 mAh gâ1, and at 0.5 A gâ1, they keeps stable capacities of 400 mAh gâ1 up to 100 cycles, in addition, they also exhibit good rate capabilities. It is believed that the porous sheet nanostructure plays an important role in the electrochemical performance.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
X.H. Huang, X.H. Xia, Y.F. Yuan, F. Zhou,