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MoS2 nanosheets inlaid in 3D fibrous N-doped carbon spheres for lithium-ion batteries and electrocatalytic hydrogen evolution reaction
- Source :
- Carbon. 150:363-370
- Publication Year :
- 2019
- Publisher :
- Elsevier BV, 2019.
-
Abstract
- 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 ∼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.
- Subjects :
- Tafel equation
Solid-state chemistry
Nanocomposite
Materials science
chemistry.chemical_element
02 engineering and technology
General Chemistry
Overpotential
010402 general chemistry
021001 nanoscience & nanotechnology
Electrochemistry
01 natural sciences
0104 chemical sciences
Anode
chemistry.chemical_compound
chemistry
Chemical engineering
General Materials Science
Lithium
0210 nano-technology
Molybdenum disulfide
Subjects
Details
- ISSN :
- 00086223
- Volume :
- 150
- Database :
- OpenAIRE
- Journal :
- Carbon
- Accession number :
- edsair.doi...........fd2f5cc0b69a93d19f98adc775e8983b