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Green and economical synthesis of carbon-coated MoO2 nanocrystallines with highly reversible lithium storage capacity.

Journal of nanoscience and nanotechnology (2014-04-18)
Xiaohong Sun, Yifeng Shi, Xiangpeng Fang, Huiming Ji, Xiaolei Li, Shu Cai, Chunming Zheng, Yongsheng Hu
ABSTRACT

Carbon-coated MoO2 nanocrystallines with uniform particle size and carbon-coating morphology have been fabricated by a green and economical hydrothermal route and carbonization process. Glucose here acts as a multifunctional agent, not only as the reducing species to prepare MoO2, but also as the carbonaceous precursor and coating agent to form the carbon-coated and nanoscale MoO2 crystallines. The electrochemical tests demonstrate that the as-synthesized carbon-coated MoO2 nanocrystallines exhibit high capacity and excellent capacity retention as an anode material for lithium-ion batteries. The specific discharge capacity is as high as 790 mA h g(-1) in the first cycle and 730 mA h g(-1) over 50 cycles. The significant enhancement in the electrochemical Li storage performance is attributed to the synergistic effect of the nanocrystallines structure with small particle size and uniform carbon-coating shell, which reduces the diffusion distance for Li-ion and electron, provides high electric conductivity and relieves the volume effect during the cycling.

MATERIALS
Product Number
Brand
Product Description

Carbon, foil, 50x50mm, thickness 0.5mm, flexible graphite, 99.8%
Carbon, foil, 25x25mm, thickness 0.125mm, rigid graphite, fine grain size, 99.95%
Carbon, foil, 25x25mm, thickness 0.2mm, flexible graphite, 99.8%
Carbon, rod, 50mm, diameter 50mm, graphite, 99.95%
Carbon, foil, 150x150mm, thickness 0.25mm, rigid graphite, fine grain size, 99.95%
Carbon, rod, 150mm, diameter 25mm, graphite, 99.95%
Carbon, rod, 150mm, diameter 50mm, graphite, 99.95%
Carbon, microleaf, 25x70mm, thinness 0.50μm, specific density 100μg/cm2, temporary glass support, annealed, 99.997%
Carbon, foil, 12mm disks, thickness 0.5mm, rigid graphite, fine grain size, 99.95%
Carbon, rod, 100mm, diameter 2.0mm, graphite, 100%
Carbon, foil, 200x200mm, thickness 1.0mm, rigid graphite, fine grain size, 99.95%
Carbon, rod, 300mm, diameter 25mm, graphite, 99.95%
Carbon, foil, 50x50mm, thickness 0.35mm, flexible graphite, 99.8%
Carbon, foil, not light tested, 150x150mm, thickness 0.125mm, flexible graphite, 99.8%
Carbon, foil, 50x50mm, thickness 0.5mm, rigid graphite, fine grain size, 99.95%
Carbon, foil, 25x25mm, thickness 0.15mm, rigid graphite, fine grain size, 99.95%
Carbon, microleaf, 24x70mm, thinness 5.0μm, specific density 1000μg/cm2, 99.997%
Carbon, rod, 50mm, diameter 1.0mm, graphite, 99.95%
Carbon, foil, 100x100mm, thickness 5.0mm, rigid graphite, medium grain size, 99.5%
Carbon, foil, 12mm disks, thickness 1.0mm, rigid graphite, fine grain size, 99.95%
Carbon, rod, 150mm, diameter 6.35mm, graphite, 100%
Carbon, foil, 150x150mm, thickness 1.0mm, rigid graphite, fine grain size, 99.95%
Molybdenum, foil, 15mm disks, thickness 0.006mm, 99.9%
Carbon, foil, 500x500mm, thickness 0.2mm, flexible graphite, 99.8%
Carbon, foil, 15x15mm, thickness 2.0mm, hOpg
Carbon, foil, 25x25mm, thickness 0.1mm, pyrolytic graphite, 99.99%
Carbon, rod, 100mm, diameter 25mm, graphite, 100%
Molybdenum, foil, 4mm disks, thickness 0.20mm, annealed, 99.9%
Molybdenum, foil, 25mm disks, thickness 0.125mm, annealed, 99.9%
Molybdenum, foil, 6mm disks, thickness 0.25mm, annealed, 99.9%