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A simple synthesis of nanoporous Sb/C with high Sb content and dispersity as advanced anode for sodium ion batteries

Abstract

Sodium ion batteries (SIBs) attract increasing attention for large-scale energy storage. Among all anodes for SIBs, antimony (Sb) is one of the most attractive ones, but it suffers from a rapid capacity fading because of about 290% volume change upon sodiation/ desodiation. Here a facile bottom-up strategy has been developed to prepare nanoporous Sb/C with high Sb content and dispersity via the ball-milling assited solid state reaction between Sb2O3 and CaC2. The simultaneous and stoichiometric generation of Sb and C facilitates the high dispersion of Sb in, theoretically, 23 wt% carbon. Feeding excess CaC2 can adjust the porosity of the composite, and tailor Sb particles from crystalline 10-20 nm in sizes to amorphous in subnanometer scale. The synthesized amorphous Sb/C composite exhibits an unprecedented performance for sodium storage. It delivers a high reversible capacity of 480 mAh g-1 at 0.1 A g-1, 403 mAh g-1 after 1000 cycles at 1.0 A g-1, and 283 mAh g-1 after 3000 cycles at 5.0 A g-1. This study may provide a basis for developing high-capacity and long-cycle-life SIBs for practical applications.

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Publication details

The article was accepted on 08 Feb 2018 and first published on 09 Feb 2018


Article type: Communication
DOI: 10.1039/C8TA00592C
Citation: J. Mater. Chem. A, 2018, Accepted Manuscript
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    A simple synthesis of nanoporous Sb/C with high Sb content and dispersity as advanced anode for sodium ion batteries

    X. Jin, Y. Yuan, S. Jan and Z. Wang, J. Mater. Chem. A, 2018, Accepted Manuscript , DOI: 10.1039/C8TA00592C

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