The Experts below are selected from a list of 195 Experts worldwide ranked by ideXlab platform
Byung-kyu Kim - One of the best experts on this subject based on the ideXlab platform.
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Electrochemical Behaviors of Diamond-Like-Carbon-Coated Silicon Monoxide-Graphite Composite Anode for Li-Ion Battery
Journal of the Electrochemical Society, 2013Co-Authors: J. K. Lee, W. Y. Yoon, Byung-kyu KimAbstract:The effects of a diamond-like carbon (DLC) coating on a Silicon Monoxide–graphite composite electrode are studied in order to improve the electrochemical characteristics of Silicon Monoxide anodes. The DLC is applied through plasma-enhanced chemical vapor deposition and identified by high-resolution transmission electron microscopy, Raman spectroscopy, and electron microprobe analysis. DLC-coated Silicon Monoxide– graphite composite anode/LiCoO2 full-cells (CR2032) are then assembled in an argon-filled glove-box. The discharge capacity of the coated cell is 523 mA h g−1 at the first cycle and 409 mA h g−1 at the 100th cycle at a 0.5 C rate. The 100-cycle capacity retention is 78.2%, which is greater than that of the bare cell (52%). The improved electrochemical characteristics of the DLC-coated cell are determined through impedance, energy-dispersive X-ray, and scanning electron microscopy analyzes. Because the DLC has a high Young's modulus and chemical stability, the coated Silicon Monoxide– graphite composite maintains a high capacity during cycling.
J. K. Lee - One of the best experts on this subject based on the ideXlab platform.
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Electrochemical Behaviors of Diamond-Like-Carbon-Coated Silicon Monoxide-Graphite Composite Anode for Li-Ion Battery
Journal of the Electrochemical Society, 2013Co-Authors: J. K. Lee, W. Y. Yoon, Byung-kyu KimAbstract:The effects of a diamond-like carbon (DLC) coating on a Silicon Monoxide–graphite composite electrode are studied in order to improve the electrochemical characteristics of Silicon Monoxide anodes. The DLC is applied through plasma-enhanced chemical vapor deposition and identified by high-resolution transmission electron microscopy, Raman spectroscopy, and electron microprobe analysis. DLC-coated Silicon Monoxide– graphite composite anode/LiCoO2 full-cells (CR2032) are then assembled in an argon-filled glove-box. The discharge capacity of the coated cell is 523 mA h g−1 at the first cycle and 409 mA h g−1 at the 100th cycle at a 0.5 C rate. The 100-cycle capacity retention is 78.2%, which is greater than that of the bare cell (52%). The improved electrochemical characteristics of the DLC-coated cell are determined through impedance, energy-dispersive X-ray, and scanning electron microscopy analyzes. Because the DLC has a high Young's modulus and chemical stability, the coated Silicon Monoxide– graphite composite maintains a high capacity during cycling.
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Electrochemical Behaviors of Diamond-Like-Carbon-Coated Silicon Monoxide–Graphite Composite Anode for Li-Ion Battery
Journal of The Electrochemical Society, 2013Co-Authors: J. K. Lee, W. Y. Yoon, Bok Ki KimAbstract:The effects of a diamond-like carbon (DLC) coating on a Silicon Monoxide–graphite composite electrode are studied in order to improve the electrochemical characteristics of Silicon Monoxide anodes. The DLC is applied through plasma-enhanced chemical vapor deposition and identified by high-resolution transmission electron microscopy, Raman spectroscopy, and electron microprobe analysis. DLC-coated Silicon Monoxide– graphite composite anode/LiCoO2 full-cells (CR2032) are then assembled in an argon-filled glove-box. The discharge capacity of the coated cell is 523 mA h g−1 at the first cycle and 409 mA h g−1 at the 100th cycle at a 0.5 C rate. The 100-cycle capacity retention is 78.2%, which is greater than that of the bare cell (52%). The improved electrochemical characteristics of the DLC-coated cell are determined through impedance, energy-dispersive X-ray, and scanning electron microscopy analyzes. Because the DLC has a high Young’s modulus and chemical stability, the coated Silicon Monoxide– graphite composite maintains a high capacity during cycling.
Zuolong Yu - One of the best experts on this subject based on the ideXlab platform.
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preparation and characterization of Silicon Monoxide graphite carbon nanotubes composite as anode for lithium ion batteries
Journal of Solid State Electrochemistry, 2012Co-Authors: Jianning Ding, Ningyi Yuan, Meizhen Qu, Zuolong YuAbstract:Silicon Monoxide/graphite/multi-walled carbon nanotubes (SiO/G/CNTs) material was prepared by ball milling followed by chemical vapor deposition method and characterized by X-ray diffraction, scanning electron microscopy (SEM), galvanostatic charge–discharge, and AC impedance spectroscopy, respectively. The results revealed that SiO/G/CNTs exhibited an initial specific discharge capacity of 790 mAh g−1 with a columbic efficiency of 65%. After 100 cycles, a high reversible capacity of 495 mAh g−1 is still retained. The improved electrochemical properties were due to beneficial SEI by the SEM and EIS results.
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Preparation and characterization of Silicon Monoxide/graphite/carbon nanotubes composite as anode for lithium-ion batteries
Journal of Solid State Electrochemistry, 2011Co-Authors: Jianning Ding, Ningyi Yuan, Meizhen Qu, Zuolong YuAbstract:Silicon Monoxide/graphite/multi-walled carbon nanotubes (SiO/G/CNTs) material was prepared by ball milling followed by chemical vapor deposition method and characterized by X-ray diffraction, scanning electron microscopy (SEM), galvanostatic charge–discharge, and AC impedance spectroscopy, respectively. The results revealed that SiO/G/CNTs exhibited an initial specific discharge capacity of 790 mAh g−1 with a columbic efficiency of 65%. After 100 cycles, a high reversible capacity of 495 mAh g−1 is still retained. The improved electrochemical properties were due to beneficial SEI by the SEM and EIS results.
Woo Young Yoon - One of the best experts on this subject based on the ideXlab platform.
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electrochemical behavior of a Silicon Monoxide and li powder double layer anode cell
Journal of Power Sources, 2010Co-Authors: Il Won Seong, Woo Young YoonAbstract:Abstract A new technique for synthesizing double layer anodes with Silicon Monoxide and Li powder has been developed to reduce the initial capacity loss of Silicon Monoxide anodes. Double layer anode (DLA) cells are fabricated using Li emulsified powders on a Cu foil and Silicon Monoxide powders on a Cu mesh collector and their electrochemical behaviors are studied. The DLA cells show reduced initial irreversibility and enhanced coulombic efficiency. The coulombic efficiency of the first cycle of the DLA cell is over 100% and its capacity remains as 700 mAh g−1 up to 20 cycles. SEM observation shows that the Li-powder layer in DLA compensated for the initial irreversible loss and vanished after several cycles.
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electrochemical behavior of a lithium pre doped carbon coated Silicon Monoxide anode cell
Journal of Power Sources, 2009Co-Authors: Il Won Seong, Woo Young YoonAbstract:Abstract Owing to high energy density, Silicon Monoxide is an attractive anode material for lithium ion secondary batteries. However, its huge irreversible capacity during initial cycling makes it difficult to use in lithium secondary batteries. A new technique for lithiation in the Silicon Monoxide has been developed using Li powders. The electrochemical behavior of the lithium powder pre-doped carbon-coated Silicon Monoxide (OG) anode cell was studied. The cells showed reduced initial irreversibility and enhanced coulombic efficiency. The behavior of the cells was analyzed by X-ray diffraction and electrochemical testing methods.
Joseph A Nuth - One of the best experts on this subject based on the ideXlab platform.
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Vapor Pressure and Evaporation Coefficient of Silicon Monoxide over a Mixture of Silicon and Silica
Journal of Chemical & Engineering Data, 2012Co-Authors: Frank T Ferguson, Joseph A NuthAbstract:The evaporation coefficient and equilibrium vapor pressure of Silicon Monoxide over a mixture of Silicon and vitreous silica have been studied over the temperature range (1433 to 1608) K. The evaporation coefficient for this temperature range was (0.007 ± 0.002) and is approximately an order of magnitude lower than the evaporation coefficient over amorphous Silicon Monoxide powder and in general agreement with previous measurements of this quantity. The enthalpy of reaction at 298.15 K for this reaction was calculated via second and third law analyses as (355 ± 25) kJ·mol–1 and (363.6 ± 4.1) kJ·mol–1, respectively. In comparison with previous work with the evaporation of amorphous Silicon Monoxide powder as well as other experimental measurements of the vapor pressure of Silicon Monoxide gas over mixtures of Silicon and silica, these systems all tend to give similar equilibrium vapor pressures when the evaporation coefficient is correctly taken into account. This provides further evidence that amorphous s...
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vapor pressure of Silicon Monoxide
Journal of Chemical & Engineering Data, 2008Co-Authors: Frank T Ferguson, Joseph A NuthAbstract:Silicon Monoxide is a material that is used extensively in the glass and metallurgical industries. In addition, Silicon Monoxide is also particularly important to the field of astrophysics where it is theorized to play a vital role in the production of metal silicate dust grains in the condensing outflows of dying stars. In this work, the evaporation coefficients and vapor pressure of commercially available amorphous Silicon Monoxide were measured over the temperature range (1301 to 1519) K using a Knudsen effusion cell and a commercial, thermogravimetric balance. A second- and third-law analysis of the vapor pressure data yielded (351 ± 11) and (359.1 ± 2.0) kJ·mol−1 for the enthalpy of the vaporization reaction at 298.15 K, respectively. It is also shown that a thermodynamic assessment of Silicon Monoxide vapor pressure that has been used in the modeling of astrophysical condensation at 1000 K and below greatly overpredicts Silicon Monoxide vapor pressure.
