固態氧化物電解電池之電解質材料開發;Development of Electrolyte Materials for Solid Oxide Electrolysis Cell

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题名:	固態氧化物電解電池之電解質材料開發;Development of Electrolyte Materials for Solid Oxide Electrolysis Cell
作者:	謝煜彬;Hsieh, Yu-Pin
贡献者:	機械工程學系
关键词:	高溫;離子傳導;固態氧化物電解電池;氧化釔穩定氧化鋯;釤摻雜氧化鈰;熱膨脹係數;維克氏硬度值;high temperature;ionic conductivity;solid oxide electrolysis cell;yttria-stabilized zirconia;samarium doped cerium oxide;thermal expansion coefficient;Vickers hardness value
日期:	2017-07-21
上传时间:	2017-10-27 16:17:22 (UTC+8)
出版者:	國立中央大學
摘要:	本研究主要探討用於高溫離子傳導固態氧化物電解電池的電解質材料開發，使用常見的釔穩定氧化鋯(YSZ)做為基礎，摻雜二氧化鈦(TiO2)和釤摻雜氧化鈰(SDC)來製備成電解質，通過不同的煆燒溫度、壓錠壓力、壓錠時間和燒結溫度來探討電池的微觀結構和機械性質，使用網印法製備出陰陽極，其陰極材料為鎳-氧化釔穩定氧化鋯(Ni-YSZ)，陽極則為鈣鈦礦型氧化物材料鑭鍶錳(LSM)，在陰極端通氫氣陽極端通氧氣進行發電觀察其性能，最後在陰極端通二氧化碳進行電解並觀察其性能。本研究發現YSZ 摻雜TiO2 和SDC 後可以降低其燒結溫度，並獲得較大較完整的晶粒，在預燒溫度在1250 ºC、壓錠壓力294 MPa、壓錠時間5 分鐘、燒結溫度1550 ºC 時可以得到最大晶粒尺寸、平均粒徑為50.38 μm、維克氏硬度值1183.5 HV、在1000 ºC 時熱膨脹係數為8.25 10-6/K、電池電解性能在1000 ºC 下電壓1.5 V 時電流密度為631 mA/cm2。;In this study, we investigate the electrolyte materials for high temperature solid oxide electrolysis cells. The electrolyte is prepared by using yttriumstabilized zirconia (YSZ) as the basis, doped with titanium dioxide (TiO2) and samarium doped cerium oxide (SDC). The microstructure and mechanical properties of the electrolyte are investigated for different pre-sintering temperature, the uniaxial pressure and pressurized duration for producing pellets, and sintering temperature. The cathode and anode are prepared by screen printing. The cathode material is nickel-yttria stabilized zirconia (Ni-YSZ), and the anode material is lanthanum strontium manganese (LSM) perovskite material. The cell performance is measured in power generation mode by supplying hydrogen to Ni–YSZ electrode and oxygen to LSM electrode. The performance in electrolysis mode is measured by supplying carbon dioxide to Ni-YSZ electrode. Results show that YSZ doped TiO2 and SDC can reduce the sintering temperature. Electrolytes with large grains, averaged at 50.4 μm, can be obtained using a pre-sintering temperature of 1250 ºC, a pressure of 294 MPa for 5 minutes for producing pellets, and a sintering temperature of 1550 ºC. In addition, the thermal expansion coefficient at 1000 ºC is 8.25 10-6 /K, the Vickers hardness value is 1183.5 HV. The current density of the cell is 631 mA/cm2 at 1.5V and 1000 ºC in the electrolysis mode.
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