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Ultra-small and highly crystallized ZnFe2O4 nanoparticles within double graphene networks for super-long life lithium-ion batteries

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Abstract

To achieve high-performance lithium ion batteries (LIBs), tremendous efforts have been devoted to the design of multifunctional electrode materials with a short Li+ diffusion pathway, high electronic conduction, large electrode/electrolyte contact area and efficiency elastic buffer space to accommodate volume change during cycling. However, the design and synthesis of these versatile structures still remain a big challenge. Here, for the first time we present a novel strategy for spatial confinement of ultra-small and highly crystallized ZnFe2O4 nanoparticles (∼12 nm) within double graphene networks constructed by ultra-small graphene sheets (USGNs) and large graphene sheets (GNs). The interconnected double graphene networks can act as a “barrier” for spatially confined growth of ZnFe2O4 and as a “structural buffer” for enhanced cycling stability, as well as electrically conductive paths. As a result, the ZnFe2O4/USGN/GN exhibits a large reversible capacity of 1257 mA h g−1 at 0.1 A g−1, excellent rate capability (575 mA h g−1 at 1 A g−1), and superior cycling stability (706 mA h g−1 at 0.5 A g−1 after 1000 cycles and 475 mA h g−1 at 1 A g−1 even after 2000 cycles). Our strategy can be further extended to the fabrication of other electrode materials for supercapacitors, fuel cells and metal-ion batteries.

Graphical abstract: Ultra-small and highly crystallized ZnFe2O4 nanoparticles within double graphene networks for super-long life lithium-ion batteries

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Publication details

The article was received on 29 Mar 2017, accepted on 13 May 2017 and first published on 15 May 2017


Article type: Paper
DOI: 10.1039/C7TA02726E
Citation: J. Mater. Chem. A, 2017, Advance Article
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    Ultra-small and highly crystallized ZnFe2O4 nanoparticles within double graphene networks for super-long life lithium-ion batteries

    L. Zhang, T. Wei, J. Yue, L. Sheng, Z. Jiang, D. Yang, L. Yuan and Z. Fan, J. Mater. Chem. A, 2017, Advance Article , DOI: 10.1039/C7TA02726E

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