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Engineering Graphene with Red Phosphorus Quantum Dots for Superior Hybrid Anodes of Sodium-ion Batteries

Abstract

Red phosphorus (P) have been considered as one of the most promising anode materials for sodium-ion batteries (SIBs) because of its highest theoretical capacity (~2600 mAh g-1). For the first time, we report a reliable hydrothermal method for the preparation of red phosphorus quantum dots (RPQDs) with the commercial red P as source. Moreover, an effective strategy is designed to fabricate RPQDs/rGO nanohybrids for addressing the intrinsic issues of red P as anode materials of SIBs. Benefiting from the nanostructuring of red P and the coupling of RPQDs with rGO, the obtained nanohybrids not only promotes electron and ion transfer, but also effectively enhances the electronic conductivity, restrains the aggregation of RPQDs and buffers the large volume changes of red phosphorus during the charge-discharge process. The nanohybrids delivers an initial specific capacity of 1161 mAh g-1 and a low capacity deterioration rate of less than 0.12% per cycle even after 250 cycles at a current density of 200 mA g-1. The feasibility for scale production of such RPQDs/rGO nanohybrid, associate with its outstanding Na-ion storage properties and low cost demonstrate that the RPQDs/rGO hybrid is a very promising anode for SIBs.

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Supplementary files

Publication details

The article was received on 26 Jul 2017, accepted on 04 Sep 2017 and first published on 05 Sep 2017


Article type: Paper
DOI: 10.1039/C7NR05470J
Citation: Nanoscale, 2017, Accepted Manuscript
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    Engineering Graphene with Red Phosphorus Quantum Dots for Superior Hybrid Anodes of Sodium-ion Batteries

    G. Zeng, X. Hu, B. Zhou, J. Chen, C. Cao and Z. Wen, Nanoscale, 2017, Accepted Manuscript , DOI: 10.1039/C7NR05470J

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