Carbon-coated MoS<sub>1.5</sub>Te<sub>0.5</sub> nanocables for efficient sodium-ion storage in non-aqueous dual-ion batteries.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 35115491.
- Also identified by DOI 10.1038/s41467-022-28176-0 and PMC identifier 8814252.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
Abstract
Sodium-based dual-ion batteries have received increased attention owing to their appealing cell voltage (i.e., >3 V) and cost-effective features. However, the development of high-performance anode materials is one of the key elements for exploiting this electrochemical energy storage system at practical levels. Here, we report a source-template synthetic strategy for fabricating a variety of nanowire-in-nanotube MS<sub>x</sub>Te<sub>y</sub>@C (M = Mo, W, Re) structures with an in situ-grown carbon film coating, termed as nanocables. Among the various materials prepared, the MoS<sub>1.5</sub>Te<sub>0.5</sub>@C nanocables are investigated as negative electrode active material in combination with expanded graphite at the positive electrode and NaPF<sub>6</sub>-based non-aqueous electrolyte solutions for dual-ion storage in coin cell configuration. As a result, the dual-ion lab-scale cells demonstrate a prolonged cycling lifespan with 97% capacity retention over 1500 cycles and a reversible capacity of about 101 mAh g<sup>-1</sup> at specific capacities (based on the mass of the anode) of 1.0 A g<sup>-1</sup> and 5.0 A g<sup>-1</sup>, respectively.