現今隨著人們對各種電子產品的興趣日益增長，可穿戴技術成為熱門話題。但可穿戴設備通常需要電池提供運行電源。然而相較於不斷縮小尺寸的電子產品而言，電池仍然體積龐大且重量沉重。此外，電池的使用壽命有限，需要頻繁充電，限制了可穿戴設備的功能。因此能量收集技術成為提升可穿戴設備功能的主要替代方案，人體以運動和熱能的形式釋放出大量能量。因此利用熱電裝置進行身體熱能收集的技術一直是研究的核心。
本研究是利用奈米碳管酸化改質方式，使原本在水或有機溶劑中不容易分散的奈米碳管能夠與溶液中其他分子之間的相互作用力，從而改善其分散性和溶解性，並藉由奈米碳管-石墨烯混合來增強複合材料電網絡，降低接觸電阻，同時也可以防止奈米碳管團聚和石墨烯堆疊，再運用奈米碳管和石墨烯優異的電性能和高長徑比作為導電填料，添加在聚二甲基矽氧烷和氯化鈉中，做成海綿結構圓柱形狀的熱電複合材料。為了實現獨立式熱電模組，我們使用自製的海綿結構圓柱形狀的熱電複合材料，通過採用連續模組設計，將圓柱串聯成熱電模組。並將圓柱的頂部和底部貼上銅片連接，充當電極，發現在溫差為 20°C 時能產生 24 mV 的電壓，最後我們再對圓柱的大小及排列方式進行比較，最後得知在直徑為 20 mm ,高 15 mm 的海綿圓柱，且兩柱距離為 1.5 cm 時，熱電效果最好能產出 300 mV 的電壓，同時還可以證明串聯熱電模組，可以有效地增加電壓。

With the growing interest in various electronic products nowadays,
wearable technology has become a hot topic. However, wearable devices
often require batteries to provide operational power. In comparison to the
continuously shrinking size of electronic products, batteries still remain
bulky and heavy. Additionally, batteries have limited lifespans and require
frequent recharging, which restricts the functionality of wearable devices.
Therefore, energy harvesting technology has emerged as a primary
alternative to enhance the capabilities of wearable devices. The human
body releases a significant amount of energy in the form of motion and
heat. Thus, utilizing thermoelectric devices to harness body heat energy
has been a central focus of research.
This study employs a method of acid modification of nanotubes to
enhance the dispersibility and solubility of initially poorly dispersed
nanotubes in water or organic solvents. This improvement is achieved by
enhancing the interaction forces between the nanotubes and other
molecules in the solution. Furthermore, a nanotube-graphene hybrid is
utilized to enhance the electrical network of composite materials, thereby
reducing contact resistance and preventing nanotube aggregation and
graphene stacking. Leveraging the excellent electrical properties and high
aspect ratio of nanotubes and graphene, they are used as conductive fillers
added to polydimethylsiloxane and sodium chloride to create a sponge-like
cylindrical thermoelectric composite structure.
To realize an autonomous thermoelectric module, a self-made sponge-like
cylindrical thermoelectric composite material is employed. By adopting a
series module design, the cylinders are interconnected to form a
thermoelectric module. Copper plates are affixed to the top and bottom of
the cylinders to serve as electrodes. It was observed that a voltage of 24
mV could be generated with a temperature difference of 20°C. Finally, a
comparison of cylinder size and arrangement was conducted, revealing that
the best thermoelectric performance was achieved with sponge cylinders
of 20 mm diameter and 15 mm height, placed 1.5 cm apart. Under these
conditions, the thermoelectric effect yielded a voltage of 300 mV,
demonstrating that series-connected thermoelectric modules can
effectively amplify voltage.

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