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Investigation of the performance of a pilot-scale barrel atmospheric plasma system for plasma activation of polymer particles

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Nanotechnology and Precision Engineering 2019年第1期2卷 1-7页

作者： Hisham M.Abourayana Peter J.Dobbyn Pat Whyte Denis P.Dowling Surface Engineering Group School of Mechanical and Materials Engineering University College Dublin Irish Micro Mouldings Inverin Co.

This study reports the development and performance of a pilot-scale barrel atmospheric plasma reactor for the atmospheric plasma activation treatment of polymer particles. The polymer particles treated included acrylonitrile butadiene styrene(ABS) and polypropylene(PP). These particles had diameters in the range of 3–5 mm. The initial studies were carried out using a laboratory-scale barrel reactor designed to treat polymer particle batch sizes of 20 g. A pilot-scale reactor that could treat 500 g particle batch sizes was then developed to facilitate pre-industrial-scale treatments. The effect of operating pulse density modulation(PDM) in the range 10%–100% and plasma treatment time on the level of activation of the treated polymers were then investigated. ABS revealed a larger decrease in water contact angle compared with PP after plasma treatment under the same conditions. The optimal treatment time of ABS(400 g of polymer particles) in the pilot-scale reactor was 15 min. The plasma-activated polymer particles were used to fabricate dog-bone polymer parts through injection *** testing of the resulting dog-bone polymer parts revealed a 10.5% increase in tensile strength compared with those fabricated using non-activated polymer particles.

关键词： Atmospheric pressure plasma Barrel plasma reactor Polymer particles Water contact angle X-ray photoelectron spectroscopy Injection moulding

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A thin Si nanowire network anode for high volumetric capacity and long-life lithium-ion batteries

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Journal of Energy Chemistry 2023年第6期81卷 20-27,I0002页

作者： Ibrahim Saana Amiinu Sumair Imtiaz Hugh Geaney Tadhg Kennedy Nilotpal Kapuria Shalini Singh Kevin M Ryan Bernal Institute University of LimerickLimerick V94 T9PXIreland Department of Chemical Sciences University of LimerickLimerick V94 T9PXIreland

Silicon nanowires(Si NWs)have been widely researched as the best alternative to graphite anodes for the next-generation of high-performance lithium-ion batteries(LIBs)owing to their high capacity and low discharge ***,growing binder-free Si NW anodes with adequate mass loading and stable capacity is severely limited by the low surface area of planar current collectors(CCs),and is particularly challenging to achieve on standard pure-Cu substrates due to the ubiquitous formation of Li+inactive silicide ***,the growth of densely-interwoven In-seeded Si NWs is facilitated by a thin-film of copper-silicide(CS)network in situ grown on a Cu-foil,allowing for a thin active NW layer(99.6%and stable performance for>900 cycles with≈88.7%capacity *** significantly,it delivers a volumetric capacity of≈1086.1 m A h/cm^(3)at *** full-cell versus lithium manganese oxide(LMO)cathode delivers a capacity of≈1177.1 m A h/g at 1C with a stable rate *** electrode architecture represents significant advances toward the development of binder-free Si NW electrodes for LIB application.

关键词： Si NW anode Silicidation LMO cathode Amorphous ligaments Volumetric capacity Lithium-ion batteries

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