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MoS2 nanosheets inlaid in 3D fibrous N-doped carbon spheres for lithium-ion batteries and electrocatalytic hydrogen evolution reaction
Shanghai Univ, Peoples R China.
Shanghai Univ, Peoples R China.
Shanghai Univ, Peoples R China.
Shanghai Univ, Peoples R China.
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2019 (English)In: Carbon, ISSN 0008-6223, E-ISSN 1873-3891, Vol. 150, p. 363-370Article in journal (Refereed) Published
Abstract [en]

Molybdenum disulfide (MoS2) has received considerable interests in rechargeable lithium-ion batteries (LIBs) and hydrogen evolution reaction (HER). To overcome the instinct limitations of pristine MoS2, such as low conductivity, poor cyclic stability and rate performance, hybrid carbon-MoS2 composites are often practically applied to improve the electrochemical properties. Herein, a facile, scalable, and durable synthesis method is innovated to inlay MoS2 nanosheets into three-dimensional (3D) fibrous nitrogen-doped carbon spheres (FNCs) for achieving 3D FNC-MoS2 composites. The free-standing 3D FNC-MoS2 nanocomposites can be used as the anode for LIBs. It exhibits a high reversible capacity of similar to 700 mA h g(-1), and nearly no fading of the capacity nearly after 400 cycles at a current density of 1.2 A g(-1). Meanwhile, FNC-MoS2 exhibits superior HER activity accompanied by a small overpotential of around 194 mV in 0.5 M H2SO4. Tafel slopes are estimated to be 54 mV dec(-1), and the current density of FNC-MoS2 decreases very slightly compared to the initial one after 1000 cycles. We are convinced that the enhanced Li+ storage performance and HER activity are attributed to the synergistic effects and structural advantages, such as higher specific surface, larger pore volume, radical fibrous structure, and chemical/mechanical stability, achieved from the unique architectures of the title material. (C) 2019 Elsevier Ltd. All rights reserved.

Place, publisher, year, edition, pages
PERGAMON-ELSEVIER SCIENCE LTD , 2019. Vol. 150, p. 363-370
Keywords [en]
MoS2; N-doped fibrous carbon; Lithium-ion batteries; Hydrogen evolution reaction
National Category
Materials Chemistry
Identifiers
URN: urn:nbn:se:liu:diva-158803DOI: 10.1016/j.carbon.2019.05.029ISI: 000472193400037OAI: oai:DiVA.org:liu-158803DiVA, id: diva2:1337795
Note

Funding Agencies|Natural Science Foundation of Shanghai [17ZR1410500]; National Natural Science Foundation of China [21601120, 11428410, 11375111]; Swedish Government strategic faculty grant in material science (SFO, MATLIU) in Advanced Functional Materials (AFM) (VR) [5.1-2015-5959]

Available from: 2019-07-17 Created: 2019-07-17 Last updated: 2019-07-17

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Uvdal, KajsaHu, Zhang-Jun
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Molecular Surface Physics and Nano ScienceFaculty of Science & Engineering
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