現今二氧化錳(MnO2)在化學反應中主要作為催化劑，如製造氧氣；或作為酸性溶液中的氧化劑，其特性有較大的孔隙度及較低的極化現象，在一定的空間內可以壓縮較多的二氧化錳且維持電極特性。然而，微型燃料電池因為電極表面積非常小，導致電力輸出不佳，在電極表面積接觸非常小之狀況下，可利用二氧化錳混合碳黑、奈米碳管與石墨烯等碳材來改善觸媒及空氣陰極的產電效益。
本研究中，利用AutoCAD軟體繪製單室微生物燃料電池的設計圖，選用壓克力為外殼材料，以CNC傳統銑削方式製作微生物燃料電池，以改善之前林彥廷文獻中[1]所採用的3D列印技術中漏液及成本昂貴的問題。藉由磁石攪拌機混合二氧化錳與碳黑、奈米碳管與石墨稀等碳材，將混合液塗覆在碳布上並使用電化學儀器進行微生物燃料電池電壓量測與極化實驗。
利用二氧化錳添加碳材改善觸媒及空氣陰極的功能，以期找出最佳開路電位值及最大功率密度值，預期達到最佳的產電效益。
本研究成果顯示，在碳布上塗布二氧化錳得到最大的電流密度值0.523A/m2及最大功率密度值0.290W/m2。觸媒當中，以50%MnO2/CNT得到最佳效果，開路電位值提升至0.808V，最大功率密度提升至0.694W/m2。

Nowadays, manganese dioxide (MnO2) is mainly used as a catalyst in chemical reactions, such as oxygen production; or as an oxidant in an acidic solution, its characteristics have large porosity and low polarization, and can be compressed in a certain space. More manganese powder has good electrode characteristics. However, micro fuel cells have poor surface area due to very small electrode surface area. Under the condition that the surface area of the electrode is very small, carbon dioxide such as carbon black, carbon nanotubes and graphene can be mixed to improve the catalyst. And the electricity production efficiency of the air cathode.
In this study, the design of single-chamber microbial fuel cell was drawn by AutoCAD software, and the microbial fuel cell was fabricated by CNC traditional milling method using acrylic as the outer casing material to improve the 3D printing used in Lin Yanting's literature [1]. The problem is leakage and cost in the technology. The carbon dioxide, carbon black, carbon nanotubes and graphite thin carbon materials were mixed by a magnet mixer, and the mixture was coated on a carbon cloth and subjected to microbial fuel cell voltage measurement and polarization experiments using an electrochemical instrument.
The use of manganese dioxide to add carbon materials to improve the function of the catalyst and air cathode, in order to find the best open circuit potential value and maximum power density value, is expected to achieve the best power generation benefits.
The results of this study shows that the coating of manganese dioxide on carbon cloth gives the maximum current density value of 0.523 A/m2 and the maximum power density value of 0.290 W/m2. Among the catalysts, the best effect was obtained with 50% MnO2/CNT, the open circuit potential value was increased to 0.808 V, and the maximum power density was increased to 0.694 W/m2.
Keywords: single-chamber microbial fuel cell, carbon cloth modification, manganese dioxide, power generation

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