氧氣極材料於可逆式固態氧化物燃料電池之特性研究

Study of reversible solid oxide fuel cell with different oxygen electrode materials

林承佑(Cheng-You Lin)

指導教授 ： 鐘國濱

元智大學/工程學院/機械工程學系/碩士(2012年)

摘要

可逆式固態氧化物燃料電池(Unitized Regenerative Solid Oxide Fuel Cell, URSOFC)是將固態氧化物電池之發電模式(Solid Oxide Fuel Cell, SOFC)與電解模式(Solid Oxide Electrolyzer Cell, SOEC)之功能作結合，達到在同一系統中可分別進行電池放電與電解儲能兩種功能。SOFC在用電尖峰時刻可進行發電提供電力，而SOEC於離峰時刻可進行產氫儲能，而氫氣對工業應用是有用之氣体，除了可提供工業應用，亦可作為電池發電時所需之燃料。本次研究主要探討可逆式固態氧化物燃料電池(URSOFC)元件之燒結製備與電池/電解之放電性能分析。藉由燒結製備流程之改進，使燒結完成的元件達至理想之平整度，以降低電池組裝困難。使用LSCF、LSM-YSZ與LSM之不同氧氣極材料塗佈並進行電池放電與電解性能測試，探討電池放電和電解模式操作下，溫度、溼度變化與長效老化之性能相對關係，並將電池進行SEM與XRD分析，觀察實驗前後氫氣極支撐層電池在結構與元素上的變化。

關鍵字

可逆式固態氧化物燃料電池(URSOFC) ； 鑭鍶錳 ； 鑭鍶鈷鐵 ； 鑭鍶錳氧加氧化釔穩定氧化鋯 ； 燃料電池 ； 電解

並列摘要

A utilized regenerative solid oxide fuel cell (URSOFC) provides the dual function of performing energy storage and power generation, all in one unit. When functioning as an energy storage device, the URSOFC acts like an solid oxide electrolyzer cell (SOEC) in water electrolysis mode; whereby the electric energy is stored as (electrolyzed) hydrogen and oxygen gases. While hydrogen is useful as a transportation fuel and in other industrial applications, the URSOFC also acts as a solid oxide fuel cell (SOFC) in power generation mode to produce electricity when needed. The URSOFC would be a competitive technology in the upcoming hydrogen economy on the basis of its low cost, simple structure, and high efficiency. This thesis reports the manufacturing of its core device – hydrogen electrode supported cell with use of different oxygen electrode (LSM-YSZ, LSM, LSCF) and its operation under SOFC and SOEC mode. In order to lower difficulties during cell assembly, acceptable flatness of hydrogen electrode supported cell is accomplished with improvement of manufacturing process. Also reported are the resulting performance, both in SOEC and SOFC modes, as a function of its operating parameters such as temperature and relative humidity. We found that the URSOFC performance improved with increasing temperature for all oxygen electrodes – LSM, LSM+YSZ, LSCF. As for the effect of relative humidity, cell with LSM improved with relative humidity under SOEC mode while decreased under SOFC mode.

並列關鍵字

LSM-YSZ ； Fuel Cell ； Water Electrolysis ； Reversible Solid Oxide Fuel Cell (RSOFC) ； LSM ； LSCF

參考文獻

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