ChemInform Abstract: High Ionic Conductivity with Low Degradation in A-Site Strontium-Doped Nonstoichiometric Sodium Bismuth Titanate Perovskite.
ChemInform Abstract: High Ionic Conductivity with Low Degradation in A-Site Strontium-Doped Nonstoichiometric Sodium Bismuth Titanate Perovskite.
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ChemInform 摘要：A 位锶掺杂非化学计量钛酸铋钠钙钛矿具有高离子电导率和低降解性。
DOI：
10.1002/chin.201642010
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
Yang F
中科院分区：
文献类型：
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作者：
Yang F
氧离子导体是一类令人兴奋的材料。 1 由于氧化物离子导体在固体氧化物燃料电池 (SOFC)、氧气分离膜、氧气传感器和氧气泵等各种重要技术设备中的潜在应用，氧化离子导体的发展一直受到持续推动。 2− 6 在过去的十年中，氧化物离子导体的研究步伐很快。多种材料，例如ZrO 2 或CeO2 基萤石、7− 10 LaGaO 3 基钙钛矿、11− 13 La2Mo2 O9 基LAMOX 系列、14 硅酸镧基磷灰石、15 稳定δ-Bi2O3 16− 20 和Bi4V2O11 基BIMEVOX 系列21据报道，其中Bi基材料表现出已知最高的氧离子电导率。尽管它们在中间温度（即400~600℃）下的氧化物离子电导率水平颇具吸引力，但由于两个原因，将稳定的δ-Bi2O3材料用作中温固体氧化物燃料电池（ITSOFC）的电解质具有挑战性。首先，它们在燃料电极所需的操作条件（氧分压−温度，pO2−T）下易于发生化学还原/分解。 22 其次，已知许多稳定的 δ-Bi2O3 材料在该温度范围内会由于相变和阴离子排序的结合而导致氧化物离子电导率下降（或老化）。前者通常发生在> 600 C，而后者通常在~ 500 C时占主导地位，但在较低温度下变得不那么明显，因为
Oxide-ion conductors are an exciting class of materials. 1 There has been a continued drive for the development of oxide-ion conductors because of their potential applications in various important technological devices such as solid oxide fuel cells (SOFCs), oxygen separation membranes, oxygen sensors, and oxygen pumps. 2− 6 In the past decade, the pace of research on oxide-ion conductors has been rapid. A wide range of materials, eg, ZrO 2 or CeO2-based fluorites, 7− 10 LaGaO 3-based perovskites, 11− 13 La2Mo2 O9-based LAMOX family, 14 lanthanum silicate-based apatites, 15 stabilized δ-Bi2O3 16− 20 and the Bi4V2O11-based BIMEVOX family 21 have been reported, among which Bi-based materials exhibit the highest known oxygen-ion conductivity.Despite their attractive levels of oxide-ion conductivity at intermediate temperatures, ie, 400− 600 C, it is challenging to implement stabilized δ-Bi2O3 materials as an electrolyte for intermediate temperature solid oxide fuel cells (ITSOFCs) for two reasons. First, they are prone to chemical reduction/decomposition under the required operating conditions (partial oxygen pressure− temperature, pO2− T) at the fuel electrode. 22 Second, many stabilized δ-Bi2O3 materials are known to suffer from degradation (or aging) of the oxide-ion conductivity in this temperature range due to a combination of phase transformations and anion ordering. The former generally occur at> 600 C, whereas the latter is often dominant at∼ 500 C but becomes less pronounced at lower temperatures due to