In Situ Carbon-Doped Mo(Se0.85 S0.15 )2 Hierarchical Nanotubes as Stable Anodes for High-Performance Sodium-Ion Batteries

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Zheng-Tian ShiChun-Sing Lee

Abstract

Sodium-ion batteries (SIBs) are promising energy storage devices, but suffer from poor cycling stability and low rate capability. In this work, carbon doped Mo(Se0.85 S0.15 )2 (i.e., Mo(Se0.85 S0.15 )2 :C) hierarchical nanotubes have been synthesized for the first time and serve as a robust and high-performance anode material. The hierarchical nanotubes with diameters of 300 nm and wall thicknesses of 50 nm consist of numerous 2D layered nanosheets, and can act as a robust host for sodiation/desodiation cycling. The Mo(Se0.85 S0.15 )2 :C hierarchical nanotubes deliver a discharge capacity of 360 mAh g(-1) at a high current density of 2000 mA g(-1) and keep a 81.8% capacity retention compared to that at a current density of 50 mA g(-1) , showing superior rate capability. Comparing with the second cycle discharge capacities, the nanotube anode can maintain capacities of 102.2%, 101.9%, and 97.8% after 100 cycles at current densities of 200, 500, and 1000 mA g(-1) , respectively. This work demonstrates the best cycling performance and high-rate sodium storage capabilities of MoSe2 for SIBs to date. The hollow interior, hierarchical organization, layered structure, and carbon doping are beneficial for fast Na(+) -ion and electron k...Continue Reading

References

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Citations

Nov 6, 2018·Chemistry : a European Journal·Qi PanXuping Sun
Mar 21, 2020·Chemistry : a European Journal·Nianxiang ShiShenglin Xiong
Oct 11, 2019·Royal Society Open Science·Santanu MukherjeeGurpreet Singh
Jun 15, 2018·ACS Applied Materials & Interfaces·Luxiang MaJitao Chen
Nov 11, 2020·ACS Applied Materials & Interfaces·Yi-Gang WengJie Dai
Sep 21, 2018·ACS Applied Materials & Interfaces·Yaqiong ZhangXuelin Yang
Mar 7, 2019·ACS Applied Materials & Interfaces·Yaqiong ZhangXuelin Yang

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