應用於鈉/鋰二氧化碳電池之釕複合奈米碳管陰極觸媒 Cathode Catalysts of Ruthenium Composite Carbon Nanotubes for Sodium / Lithium Carbon Dioxide Battery

Date
2020
Authors
蔡淳名
Tsai, Chun-Ming
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Abstract
自18世紀工業革命,人類生活型態巨大改變。人們對於能源需求與日俱增,然以傳統石化燃料作為能源來源,於產生能源過程中製造大量之二氧化碳等溫室氣體,致使全球暖化問題。又因石化燃料枯竭危機,促使綠色替代能源之相關研究蓬勃發展。電池為目前廣泛應用之儲能系統,鈉/鋰二氧化碳電池(sodium/lithium carbon dioxide battery)因具備重量輕、高能量密度與高比電容量之優勢,可解決溫室氣體排放之問題,且鈉金屬具低成本與地球含量高等優點,已成為極具潛力之儲能裝置。 本研究乃合成釕奈米粒子複合多壁碳奈米管(Multi-walled carbon nanotubes)作為鈉/鋰二氧化碳電池觸媒陰極。藉高活性之釕奈米粒子修飾多壁奈米碳管,奈米碳管具良好之熱穩定性與導電性質,且高體表面積之特性助於儲存放電產物。釕奈米粒子於充電時有效催化放電產物之分解,改善其循環壽命與過電位。本研究以鈉金屬與鋰金屬作為電池陽極材料並比較電池效能,因鈉成本低廉且產量高,故本研究期望鈉金屬取代成本高之鋰金屬。本研究合成之多壁碳奈米管修飾釕奈米粒子(Ru/MWCNTs)作為鈉/鋰二氧化碳電池之陰極觸媒,除有效分解沉積於陰極上之放電產物進而提高循環壽命,亦於鈉/鋰二氧化碳電池比較中證實鈉二氧化碳電池之可行性與其效能不亞於鋰二氧化碳電池,可知鈉二氧化碳電池極具發展與研究之潛力,其為低成本與高理論能量密度之新一代綠能儲能系統。
Since the industrial revolution in the 18th century, people's demand for energy is increasing day by day, but traditionally using fossil fuel as an energy source to produce a large number of greenhouse gases such as carbon emissions in the process of generating energy has caused the global warming problem to be imminent and the crisis of depletion of petrochemical fuel. Promote the vigorous development of research related to green alternative energy. The battery is currently the widely used energy storage system. Sodium/lithium carbon dioxide battery has the advantages of a lightweight, high energy density and high specific capacity. To solve the problem of greenhouse gas emissions, sodium metal has become a potential energy storage device in recent years because of its low cost and high earth content. The synthesis of ruthenium nanoparticles composites multi-wall carbon nanotubes as a sodium/lithium carbon dioxide battery catalyst. Multi-walled carbon nanotubes are modified with highly active ruthenium nanoparticles. The carbon nanotubes have good thermal stability and electrical conductivity, and the high specific surface area facilitates the deposition of stored discharge products. Ruthenium nanoparticles effectively catalyze the decomposition of discharge products during charging, improving their cycle life, and overpotential phenomena. This project also used lithium metal and sodium metal as battery anode materials and compared battery performance. Due to the low cost and high yield of sodium, we expect that sodium metal will gradually replace the high-cost lithium metal. The multi-walled carbon nanotubes modified ruthenium nanoparticles (Ru/MWCNTs) synthesized in this project are used as cathode catalysts for sodium/lithium carbon dioxide batteries. In addition to effectively decomposing the discharge products deposited on the cathode to improve cycle life, also used in sodium/the comparison of lithium carbon dioxide batteries proves that the feasibility and performance of sodium carbon dioxide batteries are no less than that of lithium carbon dioxide batteries. It can be seen that sodium carbon dioxide batteries have great potential for development and research, and provide low-cost and new-generation green energy storage systems with high theoretical density.
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Keywords
鈉二氧化碳電池, 鋰二氧化碳電池, 陰極催化觸媒, 釕奈米粒子, 新能源材料, 多壁奈米碳管, Sodium carbon dioxide battery, Lithium carbon dioxide battery, Cathode catalyst materials, Ruthenium nanoparticle, Multi-walled carbon nanotubes, Energy materials
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