摩擦奈米發電機（TENG）透過摩擦起電效應和靜電感應發電，是一種極具應用潛力的能量收集方法。本研究運用簡化模型探討固固接面TENG之各階段發電機制，並解析過程中各影響因子，針對材料參數及裝配參數進行最佳化改良，使輸出效能最佳化。接著展示了一種利用鐵氟龍環管與玻璃球珠作為摩擦材質，安裝於轉輪結構上的環管式TENG裝置。其中球珠直徑略小於管徑，預先填入管中，管以環型固定於轉子隨之轉動，側邊開出溝槽，透過與定子相連的擋板構造，將管內球珠限制於特定活動範圍，在固定的區域內，球珠由不停轉動的鐵氟龍管帶動而在原地轉動，並與管壁產生摩擦，產生表面電荷。此表面電荷會進一步使設置於管外壁的銅電極感應出電荷流動，再藉由電刷對構造，將此正負交替的電訊號以同向直流形式導出至負載迴路中。與傳統TENG的交流輸出特性不同，此環管式TENG無需外加整流電路，降低因整流元件耗損的能量以及裝配成本，且經過最佳化，可順利點亮121顆商用LED燈泡。此環管式TENG可裝配於任何轉輪結構在適當環境下使用，本研究以臺灣常見的屋頂排風球為例將環管式TENG結合於實際產品，展示透過環管式TENG收集環境風能與熱能，將環境廢能轉換為電能並實際應用於生活中的方式。除了可作為居家綠能供電，亦可用於自供電智慧監測裝置應用於農畜產業中。

The working principle of triboelectric nanogenerators (TENGs) is the coupling of triboelectrification and electrostatic induction effect. The contact behaviors between solid-solid relative motion are divided into several steps including electrostatic induction, charge retention, depletion and electrostatic induction and the mechanism in each step are revealed. Based on the mechanism and simplified model, the relevant parameters of the TENG are optimized. In this research, a solid-solid interface based rotary-tubular TENG motivated by spinning device with direct-current output is demonstrated. This TENG consists of a sandwich structure of copper electrodes on fluorinated ethylene propylene (FEP) tube fixed around the rotator of the spinning object and dielectrics pellets inserted into the tube. The tube is cut along the edge to make a track so that while spinning, the prefilled pellets would be restricted in certain area by stoppers fixed to the stator through the track. Different from the traditional TENGs, the energy generated by our device is converted from alternating-current into direct-current output by the electric brushes structure to reduce the fabrication cost. After optimizing the parameter combination, the direct-current rotary-tubular TENG was able to directly light up 121 commercial LEDs at 35 rpm. To demonstrate the utilization of this rotary-tubular TENG, the device is then mounted on a roof ventilator to harvest wind and convection energy, showing its potential to be used as self-powered generation systems for future monitoring and wasted energy harvesting.

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