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Title: Composite electrolyte with proton conductivity for low-temperature solid oxide fuel cell

Abstract

In the present work, cost-effective nanocomposite electrolyte (Ba-SDC) oxide is developed for efficient low-temperature solid oxide fuel cells (LTSOFCs). Analysis has shown that dual phase conduction of O{sup −2} (oxygen ions) and H{sup +} (protons) plays a significant role in the development of advanced LTSOFCs. Comparatively high proton ion conductivity (0.19 s/cm) for LTSOFCs was achieved at low temperature (460 °C). In this article, the ionic conduction behaviour of LTSOFCs is explained by carrying out electrochemical impedance spectroscopy measurements. Further, the phase and structure analysis are investigated by X-ray diffraction and scanning electron microscopy techniques. Finally, we achieved an ionic transport number of the composite electrolyte for LTSOFCs as high as 0.95 and energy and power density of 90% and 550 mW/cm{sup 2}, respectively, after sintering the composite electrolyte at 800 °C for 4 h, which is promising. Our current effort toward the development of an efficient, green, low-temperature solid oxide fuel cell with the incorporation of high proton conductivity composite electrolyte may open frontiers in the fields of energy and fuel cell technology.

Authors:
 [1];  [2]; ; ; ; ; ; ; ;  [1];  [3];  [4];  [5];  [1];  [6];  [7];  [6]
  1. Department of Physics, COMSATS Institute of Information Technology, Lahore 54000 (Pakistan)
  2. (Sweden)
  3. Department of Chemistry, COMSATS Institute of Information Technology, Abbotabad 22060 (Pakistan)
  4. Sustainable Energy Technologies (SET) center, College of Engineering, King Saud University, PO-BOX 800, Riyadh 11421 (Saudi Arabia)
  5. Department of Physics, Lahore College for Women University, Lahore, 54000 (Pakistan)
  6. (China)
  7. Department of Energy Technology, Royal Institute of Technology, KTH, Stockholm 10044 (Sweden)
Publication Date:
OSTI Identifier:
22486023
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 107; Journal Issue: 18; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ELECTROLYTES; HYDROGEN IONS 1 PLUS; OXIDES; OXYGEN IONS; PROTON CONDUCTIVITY; PROTONS; SCANNING ELECTRON MICROSCOPY; SOLID OXIDE FUEL CELLS; SPECTROSCOPY; TEMPERATURE RANGE 0400-1000 K; X-RAY DIFFRACTION

Citation Formats

Raza, Rizwan, E-mail: razahussaini786@gmail.com, Department of Energy Technology, Royal Institute of Technology, KTH, Stockholm 10044, Ahmed, Akhlaq, Akram, Nadeem, Saleem, Muhammad, Niaz Akhtar, Majid, Ajmal Khan, M., Abbas, Ghazanfar, Alvi, Farah, Yasir Rafique, M., Sherazi, Tauqir A., Shakir, Imran, Mohsin, Munazza, Javed, Muhammad Sufyan, Department of Applied Physics, Chongqing University, Chongqing 400044, Zhu, Bin, E-mail: binzhu@kth.se, E-mail: zhubin@hubu.edu.cn, and Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Faculty of Physics and Electronic Science/Faculty of Computer and Information, Hubei University, Wuhan, Hubei 430062. Composite electrolyte with proton conductivity for low-temperature solid oxide fuel cell. United States: N. p., 2015. Web. doi:10.1063/1.4934940.
Raza, Rizwan, E-mail: razahussaini786@gmail.com, Department of Energy Technology, Royal Institute of Technology, KTH, Stockholm 10044, Ahmed, Akhlaq, Akram, Nadeem, Saleem, Muhammad, Niaz Akhtar, Majid, Ajmal Khan, M., Abbas, Ghazanfar, Alvi, Farah, Yasir Rafique, M., Sherazi, Tauqir A., Shakir, Imran, Mohsin, Munazza, Javed, Muhammad Sufyan, Department of Applied Physics, Chongqing University, Chongqing 400044, Zhu, Bin, E-mail: binzhu@kth.se, E-mail: zhubin@hubu.edu.cn, & Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Faculty of Physics and Electronic Science/Faculty of Computer and Information, Hubei University, Wuhan, Hubei 430062. Composite electrolyte with proton conductivity for low-temperature solid oxide fuel cell. United States. doi:10.1063/1.4934940.
Raza, Rizwan, E-mail: razahussaini786@gmail.com, Department of Energy Technology, Royal Institute of Technology, KTH, Stockholm 10044, Ahmed, Akhlaq, Akram, Nadeem, Saleem, Muhammad, Niaz Akhtar, Majid, Ajmal Khan, M., Abbas, Ghazanfar, Alvi, Farah, Yasir Rafique, M., Sherazi, Tauqir A., Shakir, Imran, Mohsin, Munazza, Javed, Muhammad Sufyan, Department of Applied Physics, Chongqing University, Chongqing 400044, Zhu, Bin, E-mail: binzhu@kth.se, E-mail: zhubin@hubu.edu.cn, and Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Faculty of Physics and Electronic Science/Faculty of Computer and Information, Hubei University, Wuhan, Hubei 430062. 2015. "Composite electrolyte with proton conductivity for low-temperature solid oxide fuel cell". United States. doi:10.1063/1.4934940.
@article{osti_22486023,
title = {Composite electrolyte with proton conductivity for low-temperature solid oxide fuel cell},
author = {Raza, Rizwan, E-mail: razahussaini786@gmail.com and Department of Energy Technology, Royal Institute of Technology, KTH, Stockholm 10044 and Ahmed, Akhlaq and Akram, Nadeem and Saleem, Muhammad and Niaz Akhtar, Majid and Ajmal Khan, M. and Abbas, Ghazanfar and Alvi, Farah and Yasir Rafique, M. and Sherazi, Tauqir A. and Shakir, Imran and Mohsin, Munazza and Javed, Muhammad Sufyan and Department of Applied Physics, Chongqing University, Chongqing 400044 and Zhu, Bin, E-mail: binzhu@kth.se, E-mail: zhubin@hubu.edu.cn and Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Faculty of Physics and Electronic Science/Faculty of Computer and Information, Hubei University, Wuhan, Hubei 430062},
abstractNote = {In the present work, cost-effective nanocomposite electrolyte (Ba-SDC) oxide is developed for efficient low-temperature solid oxide fuel cells (LTSOFCs). Analysis has shown that dual phase conduction of O{sup −2} (oxygen ions) and H{sup +} (protons) plays a significant role in the development of advanced LTSOFCs. Comparatively high proton ion conductivity (0.19 s/cm) for LTSOFCs was achieved at low temperature (460 °C). In this article, the ionic conduction behaviour of LTSOFCs is explained by carrying out electrochemical impedance spectroscopy measurements. Further, the phase and structure analysis are investigated by X-ray diffraction and scanning electron microscopy techniques. Finally, we achieved an ionic transport number of the composite electrolyte for LTSOFCs as high as 0.95 and energy and power density of 90% and 550 mW/cm{sup 2}, respectively, after sintering the composite electrolyte at 800 °C for 4 h, which is promising. Our current effort toward the development of an efficient, green, low-temperature solid oxide fuel cell with the incorporation of high proton conductivity composite electrolyte may open frontiers in the fields of energy and fuel cell technology.},
doi = {10.1063/1.4934940},
journal = {Applied Physics Letters},
number = 18,
volume = 107,
place = {United States},
year = 2015,
month =
}
  • Effects of small amounts of Fe doping for Ga site in LaGaO{sub 3}-based oxide on oxide ion conductivity is investigated in this study. It is found that doping a small amount of Fe is effective for improving the oxide ion conductivity in La{sub 0.8}Sr{sub 0.2}Ga{sub 0.8}Mg{sub 0.2}O{sub 3} (LSGM). The highest oxide ion conductivity was exhibited at x = 0.03 in La{sub 0.8}Sr{sub 0.2}Ga{sub 0.8}Mg{sub 0.2{minus}x}Fe{sub x}O{sub 3} among the Fe-doped samples. Electron spin resonance (ESR) measurements suggest that Fe is trivalent in LaGaO{sub 3} lattice. The application of the Fe-doped LaGaO{sub 3}-based oxide for the electrolyte of solid oxidemore » fuel cell was further investigated. Power density of the solid oxide fuel cell was increased by using Fe-doped LSGM for electrolyte. This can be explained by the decrease in electrical resistance loss by improving the oxide ion conductivity. A maximum power density close to 700 mW/cm{sup 2} was obtained at 1,073 K on the cell using 0.5 mm thick La{sub 0.8}Sr{sub 0.2}Ga{sub 0.8}Mg{sub 0.17}Fe{sub 0.03}O{sub 3} (LSGMF) and O{sub 2} as the electrolyte and the oxidant, respectively. Therefore, close to the theoretical open-circuit potential was exhibited by the LSGMF cell. On the other hand, the power density was slightly smaller than that of the cell using Co-doped LSGM as electrolyte, especially, at temperatures lower than 973 K. This may result from the large activation energy for ion conductivity. However, the power density of the LSGMF cell was higher than that of the LSGM cell. Therefore, LSGM doped with a small amount of Fe is a promising electrolyte similar to Co-doped LSGM for the intermediate solid oxide fuel cell.« less
  • This paper describes the low temperature operation of a solid oxide fuel cell using cubic stabilized zirconia in the ZrO[sub 2]-Sc[sub 2]O[sub 3]-Al[sub 2]O[sub 3] system as an electrolyte. The hydrogen-oxygen fuel cell was fabricated by using La[sub 0.8]Sr[sub 0.2]MnO[sub 3] as the cathode material and Ni-YSZ as the anode material. The maximum power density is 0.63 W/cm[sup 2] at 800 C and 1.0 W/cm[sup 2] at 880 C. The current-voltage performance of this fuel cell suggests that the present electrolyte is a good candidate for fuel cells operating in the temperature range between 800 and 900 C.
  • A planar thin-film solid oxide fuel cell has been fabricated with an inexpensive, scalable, technique involving colloidal deposition of yttria-stabilized zirconia (YSZ) films on porous NiO-YSZ substrates, yielding solid oxide fuel cells capable of exceptional power density at operating temperatures of 700 to 800 C. The thickness of the YSZ film deposited onto the porous substrate is approximately 10 {micro}m after sintering, and is well bonded to the NiO/YSZ substrate. Ni-YSZ/YSZ/LSM cells built with this technique have exhibited theoretical open-circuit potentials (OCPs), high current densities, and exceptionally good power densities of over 1900 mW/cm{sup 2} at 800 C. Electrochemical characterizationmore » of the cells indicates negligible losses across the Ni-YSZ/YSZ interface and minor polarization of the fuel electrode. Thin-film cells have been tested for long periods of time (over 700 h) and have been thermally cycled from 650 to 800 C while demonstrating excellent stability over time.« less
  • Solid oxide fuel cells (SOFCs) with thin (La0.9Sr0.1)0.98Ga0.8Mg0.2O3-δ (LSGM) electrolytes are primary candidates for achieving high (> 1 W cm-2) power density at intermediate (< 650 °C) temperatures. Although high power density LSGM-electrolyte SOFCs have been reported, it is still necessary to develop a fabrication process suitable for large-scale manufacturing and to minimize the amount of LSGM used. Here we show that SOFCs made with a novel processing method and a Sr0.8La0.2TiO3-α (SLT) oxide support can achieve high power density at intermediate temperature. The SLT support is advantageous, especially compared to LSGM supports, because of its low materials cost, electronicmore » conductivity, and good mechanical strength. The novel process is to first co-fire the ceramic layers – porous SLT support, porous LSGM layer, and dense LSGM layer – followed by infiltration of nano-scale Ni into the porous layers. Low polarization resistance of 0.188 Ωcm2 was achieved at 650 °C for a cell with an optimized anode functional layer (AFL) and an (La,Sr)(Fe,Co)O3 cathode. Maximum power density reached 1.12 W cm-2 at 650 °C, limited primarily by cathode polarization and ohmic resistances, so there is considerable potential to further improve the power density.« less