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Triboelectric-thermoelectric hybrid nanogenerator for harvesting frictional energy

机译：摩擦-热电混合纳米发电机，用于收集摩擦能

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摘要

The triboelectric nanogenerator, an energy harvesting device that converts external kinetic energy into electrical energy through using a nano-structured triboelectric material, is well known as an energy harvester with a simple structure and high output voltage. However, triboelectric nanogenerators also inevitably generate heat resulting from the friction that arises from their inherent sliding motions. In this paper, we present a hybrid nanogenerator, which integrates a triboelectric generator and a thermoelectric generator (TEG) for harvesting both the kinetic friction energy and the heat energy that would otherwise be wasted. The triboelectric part consists of a polytetrafluoroethylene (PTFE) film with nano-structures and a movable aluminum panel. The thermoelectric part is attached to the bottom of the PTFE film by an adhesive phase change material layer. We confirmed that the hybrid nanogenerator can generate an output power that is higher than that generated by a single triboelectric nanogenerator or a TEG. The hybrid nanogenerator was capable of producing a power density of 14.98 mW cm(-2). The output power, produced from a sliding motion of 12 cm s(-1), was capable of instantaneously lighting up 100 commercial LED bulbs. The hybrid nanogenerator can charge a 47 mu F capacitor at a charging rate of 7.0 mV s(-1), which is 13.3% faster than a single triboelectric generator. Furthermore, the efficiency of the device was significantly improved by the addition of a heat source. This hybrid energy harvester does not require any difficult fabrication steps, relative to existing triboelectric nanogenerators. The present study addresses a method for increasing the efficiency while solving other problems associated with triboelectric nanogenerators.
机译：摩擦电纳米发电机是一种能量收集装置，它通过使用纳米结构的摩擦电材料将外部动能转换为电能，是众所周知的具有简单结构和高输出电压的能量收集器。然而，摩擦电纳米发电机也不可避免地产生由于其固有的滑动运动产生的摩擦而产生的热量。在本文中，我们提出了一种混合纳米发电机，该发电机集成了摩擦发电器和热发电器（TEG），用于收集动摩擦能和热能，而这些动能会被浪费掉。摩擦电动部件由具有纳米结构的聚四氟乙烯（PTFE）薄膜和可移动的铝面板组成。热电部分通过粘合剂相变材料层附接到PTFE膜的底部。我们确认，混合纳米发电机可以产生比单个摩擦纳米发电机或TEG更高的输出功率。混合纳米发电机能够产生14.98 mW cm（-2）的功率密度。由12 cm s（-1）的滑动运动产生的输出功率能够立即点亮100个商用LED灯泡。混合纳米发电机可以以7.0 mV s（-1）的充电速率为47μF电容器充电，这比单个摩擦发电器快13.3％。此外，通过增加热源，设备的效率得到了显着提高。相对于现有的摩擦电纳米发电机，这种混合式能量收集器不需要任何困难的制造步骤。本研究解决了一种在解决与摩擦纳米发电机相关的其他问题的同时提高效率的方法。

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