Carbon-coated MoS1.5Te0.5 nanocables for efficient sodium-ion storage in non-aqueous dual-ion batteries

Yangjie Liu, Xiang Hu, Junwei Li, Guobao Zhong, Jun Yuan, Hongbing Zhan (), Yongbing Tang and Zhenhai Wen ()
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Yangjie Liu: Fuzhou University
Xiang Hu: Fuzhou University
Junwei Li: Chinese Academy of Sciences
Guobao Zhong: Fuzhou University
Jun Yuan: Fuzhou University
Hongbing Zhan: Fuzhou University
Yongbing Tang: Chinese Academy of Sciences
Zhenhai Wen: Chinese Academy of Sciences

Nature Communications, 2022, vol. 13, issue 1, 1-13

Abstract: 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 MSxTey@C (M = Mo, W, Re) structures with an in situ-grown carbon film coating, termed as nanocables. Among the various materials prepared, the MoS1.5Te0.5@C nanocables are investigated as negative electrode active material in combination with expanded graphite at the positive electrode and NaPF6-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−1 at specific capacities (based on the mass of the anode) of 1.0 A g−1 and 5.0 A g−1, respectively.

Date: 2022
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DOI: 10.1038/s41467-022-28176-0

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