氧化亞銅/奈米碳管之陰極複合材料應用於鋰二氧化碳電池陰極觸媒

Cu2O / CNT Functioned as a cathode for Lithium-carbon-dioxide Battery

謝和秦(Hseih He-Chin)

指導教授 ： 胡淑芬

國立臺灣師範大學/理學院/物理學系/碩士(2019年)

https://doi.org/10.6345/NTNU201900585

摘要

長久以來，人類以燃燒石化燃料為主要之能源來源，除石化燃料枯竭危機外，持續燃燒石化燃料將導致全球二氧化碳排放量攀升，伴隨產生之溫室效應與氣候異常更為一大隱憂。鑒於環保意識抬頭，全球大量汽車經由內燃引擎燃燒汽油，驅動過程中持續排放二氧化碳等有害氣體汙染地球，故將電池作為乾淨動力來源之電動車被大力推廣與研發。傳統之水銀電池存在汞汙染問題，又鉛酸電池與鋰離子電池之能量密度不足以為電動車所使用。因此鋰二氧化碳電池為最具開發潛力之電池，具下述優點：1.鋰二氧化碳電池之陰極反應物為二氧化碳，其為當今主要之溫室氣體，若加以利用可達節能減碳之效益與2.根據計算分析，鋰二氧化碳電池具與石油相當之高能量密度，分別為11500 Wh Kg-1與13000 Wh Kg-1，基於以上原因，鋰二氧化碳電池存在機會成為電動車之電池，已成為各方研究之對象。然而，目前鋰二氧化碳電池仍存在許多未解決之問題，例如：高過電壓與穩定性差。
本研究乃藉菱形十二面體之氧化亞銅，其特殊之(110)晶面將助於光電子與光電洞導出至陰極上，又其適當之能帶結構可對碳酸鋰之分解達到光催化之效用，配合奈米碳管之高導電性、多孔狀利於氣體擴散與碳酸鋰儲存等優點，將可有效降低鋰二氧化碳電池之過電位至0.4 V。

關鍵字

鋰二氧化碳電池 ； 氧化亞銅 ； 奈米碳管 ； 陰極 ； 光催化

並列摘要

For a long time, human beings have burned fossil fuels as the main source of energy for a long time. In addition to the depletion of fossil fuels, the continued burning of fossil fuels will lead to an increase in global carbon dioxide emissions, and the resulting greenhouse effect and climate anomalies are a major concern. In view of the rising awareness of environmental protection, a large number of cars in the world burn gasoline through internal combustion engines and continue to emit harmful gases such as carbon dioxide in the driving process to pollute the earth. Therefore, electric vehicles with batteries as a clean power source have been vigorously promoted, researched and developed. Traditional mercury batteries have mercury pollution problems, and the energy densities of lead-acid batteries and lithium-ion batteries are not enough for electric vehicles. Therefore, the lithium carbon dioxide battery is the most promising battery with the following advantages. First, cathode reactant of the lithium carbon dioxide battery is carbon dioxide, which is the main greenhouse gas nowadays and can be used to save energy and reduce carbon. Second, according to the calculation and analysis, lithium-carbon dioxide batteries have high energy density comparable to gasoline, which are 12000 Wh Kg-1 and 11500 Wh Kg-1 respectively. Based on the above reasons, lithium-carbon dioxide batteries have the opportunity to become batteries for electric vehicles, which has become the object of research. However, there are still many unresolved problems in current lithium carbon dioxide batteries, such as high overvoltage and poor stability.
In this study, the rhombic dodecahedron cuprous oxide is used. Its special (110) crystal plane will facilitate the derivation of photoelectrons and photoelectrodes to the cathode, and its proper band structure can decompose lithium carbonate to photocatalysis. The utility model has the advantages of the high conductivity of porous carbon nanotubes, favorable gas diffusion, and storage of lithium carbonate, and can effectively reduce the overpotential of the lithium carbon dioxide battery.

並列關鍵字

Lithium-carbon-dioxide battery ； Cuprous oxide ； Carbon nanotube ； Cathode ； Photocatalysis

參考文獻

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