Article ID Journal Published Year Pages File Type
4766828 Electrochimica Acta 2017 8 Pages PDF
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 g−1 after 190 cycles at the current of 300 mA g−1) and superior rate performance (around 520 mA h g−1 for the current of 5000 mA g−1). 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)
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