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Your search keyword '"Leu, Hoang-Jyh"' showing total 113 results
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113 results on '"Leu, Hoang-Jyh"'

18. Recycled silicon powder coated on carbon paper used as the anode of lithium ion batteries

Author

Liu Ching-Han, Chiu Kuo-Feng, Leu Hoang-Jyh, Shen Chin-Wei, Ko Tse-Hao, and Liao Ting-Chia

Subjects
business.product_category, Materials science, Silicon, Carbonization, Materials Science (miscellaneous), chemistry.chemical_element, General Chemistry, 02 engineering and technology, engineering.material, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, 0104 chemical sciences, Anode, Ion, chemistry, Chemical engineering, Coating, Electrode, engineering, General Materials Science, Lithium, Carbon paper, 0210 nano-technology, business
Abstract

High-capacity electrode materials are critical for portable electronic equipment that requires a high-energy density from lithium ion batteries (LIBs). Many different materials and fabrication methods for such electrodes have been developed for this purpose. Carbon paper coated with recycled silicon powder (CP-RSP) was prepared by coating silicon and pitch powder on the carbon paper, followed by stabilization at 250 °C in air and carbonization at 1000 °C in N2. The CP-RSP acted as both the current-collector and the active material for the anodes of LIBs. Electrodes with 2.5, 5, and 10 wt.% silicon exhibited capacity increases of 94, 129 and 41%, respectively, compared with the silicon-free electrode. The electrode for the CP-RSP with 5 wt. % silicon exhibited an optimal balance between discharge capacity and stability in long-cycle tests under various charging rates.

Published
2019

42. Fe 3 O 4 -modified carbon cloth electrode for microbial fuel cells from organic wastewaters.

Author

Leu, Hoang-Jyh, Lin, Chiu-Yue, Chang, Fang-Chih, and Tsai, Ming-Jer

Subjects
MICROBIAL fuel cells, ELECTRODES
Abstract

The organic waste of anaerobic biohydrogen fermentation was used as the feedstock for further treatment. The bacterial contained fermentation waste was the introduced to a double-chamber microbial fuel cell (MFC) with Fe3O4-modified carbon cloth electrode. The main purpose of this study is to produce biohydrogen, reduce the chemical oxygen demand (COD) of organic waste and recover the electric power during waste treatment. The maximal (hydrogen yield) HY of 1.3 mmol H2/g TVS (total volatile solids) was obtained, and the hydrogen production rate was 25.4 mmol H2/L/d. The electricity generation in MFC can be obtained after a short acclimatization period of two days. The power generated was found to depend on the organic matter contained in the waste, and the maximum power density of 10 mW/m2(at an open circuit potential of 0.15 V) was obtained. These results pointed to the optimal conditions to enhance the hydrogen yield, energetic yield of MFC, and the COD removal in this newly designed system. [ABSTRACT FROM AUTHOR]

Published
2016
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46. The living banana plant as a long-lasting battery cell.

Author

Huang, Sy-Ruen, Chung, Chih-Hung, Leu, Hoang-Jyh, Sim, Chow-Yen-Desmond, and Lin, Chiu-Yue

Subjects
RENEWABLE energy sources, ELECTRIC potential, BANANAS, PLANT extracts, ORGANIC compounds, COPPER electrodes
Abstract

Among citrus fruits, lemon is widely used as a low-power electrical source. Although, it can generate a potential difference, this phenomenon is only sustainable for few days, and no other alternative organism has been reported to provide a similar potential with longer duration. This study reports the discovery of living banana plant as an inexpensive, reliable, stable, and long-lasting power. A Zn anode and Cu cathode are inserted into banana plant to extract electricity, and the organic compounds of plant act as electrolyte. This new discovery may introduce an era of providing renewable energy to who live in proximity to banana plantations. [ABSTRACT FROM AUTHOR]

Published
2016
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49. Plasmon-Induced Hot Electrons on Mesoporous Carbon for Decomposition of Organic Pollutants under Outdoor Sunlight Irradiation

Author

Chen, Hsin Liang, Li, Chia-Jui, Peng, Chien-Jung, Leu, Hoang-Jyh, and Hung, Wei-Hsuan

Abstract

In this study, a 4 in. CMK-8-Nafion membrane was fabricated using three-dimensional cubic ordered mesoporous carbon CMK-8 blended with a Nafion polymer. Plasmon-resonance hot electrons and holes from Au nanoparticles (NPs) combined with this CMK-8-Nafion membrane resulted in the effective decomposition of methyl orange (MO) due to the synergetic work of hot carriers with mesoporous carbon; a sample of Au/CMK-8-Nafion exposed to outdoor sunlight radiation for 150 min successfully removed 97% of MO. Fourier transform infrared spectroscopy (FTIR) was employed to examine the generation of hydroxyl groups (OH−) during decomposition. Finally, the spatial distribution of hydroxyl groups was also investigated across the different coverage densities of plasmonic Au NPs.

Published
2017
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