Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4766828 | Electrochimica Acta | 2017 | 8 Pages |
Abstract
Taking the advantage of hierarchical nanostructures into consideration, herein a facile and template free approach to achieve hierarchical microspheres assembled from the α-Fe2O3 nanosheet was formulated. The followed freeze-drying treatment is employed to realize the construction of nanostructured Fe2O3/graphene composite. The unique hierarchical structure of α-Fe2O3 combined with the flexible graphene layer not only effectively buffer the volume expansion during the cycling process, but also promote the transport of lithium ion and electron through three-dimensional networks when being assessed for lithium ion battery. The as-obtained composite exhibits significantly enhanced cycling stability (1850 mA h gâ1 after 190 cycles at the current of 300 mA gâ1) and superior rate performance (around 520 mA h gâ1 for the current of 5000 mA gâ1). The obtained-results illustrate that the rational designing of the nanostructured composite can result in the fast lithium insertion/de-insertion in lithium ion batteries which mimic merits seen in high-power electrochemical capacitors.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Yongjie Zhao, Ximei Zhai, Dong Yan, Caihua Ding, Nan Wu, Dezhi Su, Yuzhen Zhao, Heping Zhou, Xiuchen Zhao, Jingbo Li, Haibo Jin,