首页|MoP nanoparticles encapsulated in N-doped carbon nanotubes as sulfur host for advanced lithium-sulfur batteries
MoP nanoparticles encapsulated in N-doped carbon nanotubes as sulfur host for advanced lithium-sulfur batteries
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The low electrical conductivity of sulfur,strong volume expansion,shuttle effect,and sluggish redox reactions in Li-S batteries limit their practical application.MoP nanoparticles encapsulated in nitrogen-doped carbon nanotubes(MoP/NC NTs)were synthesized using MoO3 nanorods as templates via a polypyrrole coating,heat-carbonization,MoO3 partial reduction,ammonia washing,and phosphorization.The MoP/NC NTs had a hollow nanostructure with a high specific surface area,which can alleviate the volume expansion of the cathode and the shuttle effect of polysulfides.The encapsulated MoP nanoparticles can anchor the polysulfides and enhance the redox reaction kinetics.Thus,the MoP/NC NTs combined with sulfur(MoP/S/NC NTs)exhibited 440.8 mAh·g-1 over 500 cycles at 1.0 A·g-1 with a decay rate of 0.06％per cycle.The density functional theory calculations and X-ray photoelectron spectroscopy results confirmed that MoP/NC NTs could anchor polysulfides and alleviate the shuttle effect by chemical interactions.This study supplies a novel route to prepare nanoparticle-embedded in N-doped carbon nanotubes for advanced Li-S battery.
Key Laboratory of Functional Molecular Solids of the Ministry of Education,Anhui Laboratory of Molecule-Based Materials,College of Chemistry and Materials Science,Anhui Normal University,Wuhu 241002,China
Anhui Engineering Research Center of Highly Reactive Micro-Nano Powders,School of Materials and Environmental engineering,Chizhou University,Chizhou 247000,China
School of Mechanical Engineering,Yeungnam University,Gyeongsan,Gyeongbuk 38541,Republic of Korea
National Research Foundation of KoreaExcellent Scientific Research and Innovation Team of Anhui CollegesUniversity Synergy Innovation Program of Anhui ProvinceUniversity Synergy Innovation Program of Anhui Province
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