The Experts below are selected from a list of 282 Experts worldwide ranked by ideXlab platform
Dongjiang Yang - One of the best experts on this subject based on the ideXlab platform.
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nanoconfinement of Red Phosphorus nanoparticles in seaweed derived hierarchical porous carbonaceous fibers for enhanced lithium ion storage
Chemical Engineering Journal, 2018Co-Authors: Tao Xu, Daohao Li, Shuai Chen, Huawei Zhang, Dongjiang YangAbstract:Abstract Red Phosphorus has come to our attention as the anode material for lithium-ion batteries with high theoretical specific capacity of 2596 mAh g −1 due to its earth-abundant and low-cost. However, it suffers from low electroconductivity and large volume expansion, resulting in serious capacity fading. In this study, we confined Red Phosphorus nanoparticles into the hierarchical porous carbonaceous fibers to enhance its cycling stability. Red Phosphorus nanoparticles preferentially filled in the micropores and gradually extended to the larger pores. The optimized electrochemical performance benefits from hierarchical pores filled with the appropriate content of Red Phosphorus, where the small micropores are used to confine the Red Phosphorus nanoparticles and the large mesopores are beneficial for the increased contact of electrolyte. This can remit excessive volume change and facilitate the contact area of electrolyte effectively. Thus, the P@HPCF-3/2 displays outstanding cycle performance with a superior high reversible capacity (1300 mAh g −1 after 100 cycles at 1 A g −1 ).
Eike Brunner - One of the best experts on this subject based on the ideXlab platform.
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unexpected reactivity of Red Phosphorus in ionic liquids
ChemInform, 2015Co-Authors: Matthias F Groh, Silvia Paasch, Alexander Weiz, Michael Ruck, Eike BrunnerAbstract:Reactions of Red Phosphorus and elemental iodine in [bmim]Cl·2AlCl3 are monitoRed by 31P liquid- and solid state NMR spectroscopy between room temperature and 80 °C.
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unexpected reactivity of Red Phosphorus in ionic liquids
European Journal of Inorganic Chemistry, 2015Co-Authors: Matthias F Groh, Silvia Paasch, Alexander Weiz, Michael Ruck, Eike BrunnerAbstract:Invited for the cover of this issue are the groups of Michael Ruck and Eike Brunner at the Technische Universitat Dresden, Germany. The cover image shows the enhanced reactivity of Red Phosphorus in the employed ionic liquid. Dissolved iodine molecules (yellow spheres) etch Red Phosphorus to form either molecular iodides like PI3 or Phosphorus nanoparticles. The formation of the different species is monitoRed by liquid- (top) and solid-phase (bottom) NMR spectroscopy.
Chongwu Zhou - One of the best experts on this subject based on the ideXlab platform.
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Red Phosphorus impregnated carbon nanofibers for sodium ion batteries and liquefaction of Red Phosphorus
Nature Communications, 2020Co-Authors: Cheng Jian, Mingrui Chen, Zhen Li, Teng Li, Tom Nilges, Kai He, Chongwu ZhouAbstract:Red Phosphorus offers a high theoretical sodium capacity and has been consideRed as a candidate anode for sodium-ion batteries. Similar to silicon anodes for lithium-ion batteries, the electrochemical performance of Red Phosphorus is plagued by the large volume variation upon sodiation. Here we perform in situ transmission electron microscopy analysis of the synthesized Red-Phosphorus-impregnated carbon nanofibers with the corresponding chemo-mechanical simulation, revealing that, the sodiated Red Phosphorus becomes softened with a “liquid-like” mechanical behaviour and gains superior malleability and deformability against pulverization. The encapsulation strategy of the synthesized Red-Phosphorus-impregnated carbon nanofibers has been proven to be an effective method to minimize the side reactions of Red Phosphorus in sodium-ion batteries, demonstrating stable electrochemical cycling. Our study provides a valid guide towards high-performance Red-Phosphorus-based anodes for sodium-ion batteries. Red Phosphorus is a promising anode for Na-ion batteries but suffers from large volume change upon cycling. Here the authors show a Red-Phosphorus-impregnated carbon nanofiber design in which the sodiated Red Phosphorus is featuRed by a “liquid-like” behavior and ultra-stable electrochemical performance is realized.
Jimmy C Yu - One of the best experts on this subject based on the ideXlab platform.
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a black Red Phosphorus heterostructure for efficient visible light driven photocatalysis
Journal of Materials Chemistry, 2015Co-Authors: Wanjun Wang, Zhurui Shen, Jimmy C YuAbstract:A new single elemental heterostructure of black and Red Phosphorus was prepaRed by a simple ball milling method. The product exhibited high visible-light-driven photocatalytic activity comparable to that of CdS.
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Red Phosphorus an elemental photocatalyst for hydrogen formation from water
Applied Catalysis B-environmental, 2012Co-Authors: Feng Wang, Wilson K H Ng, Jimmy C Yu, Chuanhao Li, Lei Zhang, Quan LiAbstract:Abstract A novel property of Red Phosphorus for visible light driven photocatalytic H 2 formation from water by photogenerated electrons has been discoveRed. The detection of hydroxyl radicals and results from photoconductivity measurements confirmed the photogeneration of electrons and holes. Theoretical calculations also indicated that the Reduction of water by photogenerated electrons would be energetically possible. A P-type semiconductor behavior of Red Phosphorus was observed. Our findings may provide insights for developing Phosphorus-based photocatalysts.
Jiazhao Wang - One of the best experts on this subject based on the ideXlab platform.
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simply mixed commercial Red Phosphorus and carbon nanotube composite with exceptionally reversible sodium ion storage
Nano Letters, 2013Co-Authors: Weijie Li, Shulei Chou, Jiazhao WangAbstract:Recently, sodium ion batteries (SIBs) have been given intense attention because they are the most promising alternative to lithium ion batteries for application in renewable power stations and smart grid, owing to their low cost, their abundant natural resources, and the similar chemistry of sodium and lithium. Elemental Phosphorus (P) is the most promising anode materials for SIBs with the highest theoretical capacity of 2596 mA h g–1, but the commercially available Red Phosphorus cannot react with Na reversibly. Here, we report that simply hand-grinding commercial microsized Red Phosphorus and carbon nanotubes (CNTs) can deliver a reversible capacity of 1675 mA h g–1 for sodium ion batteries (SIBs), with capacity retention of 76.6% over 10 cycles. Our results suggest that the simply mixed commercial Red Phosphorus and CNTs would be a promising anode candidate for SIBs with a high capacity and low cost.
