Galvanic Replacement Synthesis of Highly Uniform Sb Nanotubes: Reaction Mechanism and Enhanced Sodium Storage Performance.
basic_science · Level V
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- Record sourced from PubMed, PMID 31063350.
- Also identified by DOI 10.1021/acsnano.9b01660.
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Abstract
One-dimensional nanotubes are very useful for achieving excellent performance in lithium-ion batteries (LIBs) and sodium-ion batteries (SIBs) due to the fact that tubular structures can effectively alleviate the structural strain and shorten the ion diffusion length during repeated cycling. In this work, we report a Cu<sub>2</sub>Sb-mediated growth strategy to controllably fabricate highly uniform Sb nanotubes (NTs), as well as Cu@Cu<sub>2</sub>Sb and Cu<sub>2</sub>Sb@Sb composite NTs, via a facile galvanic replacement reaction using Cu nanowires (NWs) as sacrificial templates. Benefiting from their structural merits, the Sb NTs manifest excellent sodium storage performance with superior rate performance (286 mAh g<sup>-1</sup> at 10 A g<sup>-1</sup>) and extraordinary cycling stability (342 mAh g<sup>-1</sup> after 6000 cycles at 1 A g<sup>-1</sup>). Furthermore, a full cell with Sb NTs as anode and Na<sub>3</sub>(VOPO<sub>4</sub>)<sub>2</sub>F as cathode exhibits a high energy density (252 Wh kg<sup>-1</sup>) and high output voltage (2.7 V), revealing their significant application promise in the next-generation SIBs.