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4. High Order Liquid Crystalline Structure of Poly(11-{[(4''''-Heptyloxy-4-biphenylyl)carbonyl]oxy}-1-undecyne)
Liquid crystalline properties of a mesomorphic polyacetylene are investigated by X-ray diffraction, polarizing optical microscope, and transmission electron microscope.
http://www.polymer.cn//ss/jianxingeng/publicationsshow_13895.html |
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SiO2/carbon composite microspheres with hollow core-shell structure as high stability electrode for lithium ion batteries.
The SiO2/carbon composite material used as a lithium‐ion battery (LIB) anode was synthesized by aerosol spraying a mixture of polyvinyl alcohol (PVA) solution and SiO2nanoparticles, followed by coating polyacrylonitrile (PAN) on the SiO2/PVA surface and an annealing treatment at 800?°C. The as‐prepared SiO2/po‐C@C has a hollow core–shell structure. The hollow section contributes to accommodat...
http://www.polymer.cn//ss/shizhiqiang/publicationsshow_13888.html |
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Free-standing, welded mesoporous carbon nanofibers as anode for high-rate performance Li-ion batteries
A novel type of renewable lignin-based mesoporous carbonized nanofibers (MCNFs) has been fabricated via electrospinning technique and thermal treatment, using lignin with polyacrylonitrile (PAN) as the carbon source and triblock copolymer Pluronic P 123 as the template. The obtained MCNFs were directly used as anodes of lithium-ion batteries (LIBs) without binder and current collector. The MCNFs a...
http://www.polymer.cn//ss/shizhiqiang/publicationsshow_13887.html |
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Three-dimensional Si/hard-carbon/graphene network as high-performance anode material for lithium-ion batteries
The Si/hard-carbon/graphene (Si/HC/G) composite material used as lithium ion battery (LIB) anode was synthesized by emulsion polymerization of the mixture of resorcinol and formaldehyde in the suspension of silicon nanoparticles, followed by loading on the graphene sheets and annealing treatment of 800 A degrees C. The as-prepared three-dimensional Si/HC/G composite is composed of the Si/HC micros...
http://www.polymer.cn//ss/shizhiqiang/publicationsshow_13885.html |
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An electrospun lignin/polyacrylonitrile nonwoven composite separator with high porosity and thermal stability for lithium-ion batteries.
In this work, lignin/polyacrylonitrile composite fiber-based nonwoven membranes (L–PANs) were prepared by electrospinning with dispersing different amounts of lignin in the polyacrylonitrile (PAN) solutions. The porosity of the L–PANs could reach 74%, which was significantly higher than that of the commercialized PP separator (42%). After exposure at 150 C for 15 min, the L–PA...
http://www.polymer.cn//ss/shizhiqiang/publicationsshow_13879.html |
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Facile hydrothermal treatment route of reed straw-derived hard carbon for high performance sodium ion battery
Although hard carbon is deemed to be the most potential industrialized sodium-ion batteries anode material, there are still some problems need to be solved. In this study, a waste biomass of reed straw is pretreated by using a new strategy-hydrothermal treatment instead of pickling and successfully transformed to hard carbon materials through subsequent carbonization process. The reed straw carbon...
http://www.polymer.cn//ss/shizhiqiang/publicationsshow_13877.html |
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Electrospun Pitch/Polyacrylonitrile composite carbon nanofibers as high performance anodes for lithium-ion batteries
A new kind of soft carbon and hard carbon composite nanofibers were fabricated from isotropic pitch and polyacrylonitrile via simple electrospinning followed by stabilization and carbonization. The obtained fibrous mat was directly used as anodes of lithium-ion batteries without binder added and current collector. The composite nanofibers electrodes display a large reversible capa...
http://www.polymer.cn//ss/shizhiqiang/publicationsshow_13875.html |
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Low-cost water caltrop shell-derived hard carbons with high initial coulombic efficiency for sodium-ion battery anodes.
Hard carbon possesses excellent properties of sodium storage, but high cost and low initial coulombic efficiency significantly affect the anode in large-scale application of sodium-ion batteries (SIBs). Here, we first report the waste water caltrop shell-derived hard carbons prepared by facile pyrolysis and subsequent an acid treatment. With the dense structure, low specific surface area and large...
http://www.polymer.cn//ss/shizhiqiang/publicationsshow_13874.html |
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Composite of mesocarbon microbeads/hard carbon as anode material for lithium ion capacitor with high electrochemical performance.
Lithium-ion capacitor (LIC) is fabricated using activated carbon (AC) as the positive electrode and a mixture of mesocarbon microbeads (MCMB) and hardcarbon (HC) as the negative electrode (denoted as MH). The structure characterization of carbon materials are investigated by X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM) and nitrogen adsorption apparatus. The electro...
http://www.polymer.cn//ss/shizhiqiang/publicationsshow_13868.html |
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Mesoporous carbon with large pore volume and high surface area prepared by a co-assembling route for Lithium-Sulfur Batteries
Mesoporous carbon (MC) materials with large pore volume and high surface area have been synthesized as the conductive matrix in the sulfur cathode forthe lithium sulfur (Li/S) batteries using a simultaneous templating and carbonization method. The magnesium citrate is used as the precursor of the carbon and provides nanometer sized MgO particles template. Wide-angle X-ray diffraction (WA-XRD), hig...
http://www.polymer.cn//ss/shizhiqiang/publicationsshow_13866.html |
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