Sen-Hao Yu

Tunghai University, 臺中市, Taiwan, Taiwan

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Publications (2)12.63 Total impact

  • Jing-Shan Do · Sen-Hao Yu · Suh-Fen Cheng
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    ABSTRACT: Using the porous polypropylene (PP) films sputtered with gold and the Ni as current collectors, the electroactive materials (Ni(OH)2 and metal hydride (MH)) of positive and negative electrodes were prepared on the current collector using thick-film technology. Two types of cell configurations were prepared and the characteristics of these batteries were compared. The cycle number for the formation of batteries based on the porous PP film was found to be 2, which was significantly less than that of batteries based on the ceramic substrates. Using the porous PP film as substrate, the number of cycles for the formation of battery increased from 2 to 5 with the increase of the charge/discharge rate from 0.1C/0.025C to 2.0C/0.5C. The silver oxides dendrites formed by the oxidation of silver paste used to adhere the current collectors and the conducting wires in the charge/discharge process caused a short contact between the positive and negative electrodes, which then caused the battery failure. The cycle life of the battery based on the porous PP film was found to be greater than 400 when the charge/discharge rate was 2.0C/0.5C.
    No preview · Article · Aug 2004 · Biosensors & Bioelectronics
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    Jing-Shan Do · Sen-Hao Yu · Suh-Fen Cheng
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    ABSTRACT: Nickel–metal-hydride (Ni–MH) batteries are prepared with thick-film and thin-film technologies based on porous ceramic substrates. The porosity and the mean pore diameter of BP ceramic substrates prepared from the argils increases from 19.81% and 0.0432μm to 29.81% and 0.224μm, respectively, upon increasing the ethyl cellulose content in the BP argil from 0 to 0.79%. The pore diameter of Al2O3 substrates prepared from Al2O3 powder is mainly distributed in the range 0.01–0.5μm. The distribution of the pore diameters of BP ceramic substrates lies in two ranges, namely: 0.04–2μm and 10–300μm. Using BP ceramic plates and Al2O3 plates as substrates to fabricate thick-film Ni–MH batteries, the optimal electroactive material utilization in the batteries is 77.0 and 71.1%, respectively. On increasing the screen-printing number for preparing the cathode (Ni(OH)2) from 1 to 3, the discharge capacity of the thick-film battery increases from 0.2917 to 0.7875mAh, and the utilization in the battery decreases from 71.0 to 53.0%.
    Full-text · Article · May 2003 · Journal of Power Sources