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固体氧化物燃料电池(SOFC)是一种清洁、高效的能量转换装置,其性能受制于阴极的氧还原反应,钴基双钙钛矿氧化物PrBaCo2O5+δ具有较高的氧表面交换系数和体扩散系数,是近年来备受重视的阴极催化材料。然而,PrBaCo_2O5+δ在SOFC中的应用受到热膨胀匹配性差等的制约,为此,大量的工作研究了PrBaCo_2O5+δ的掺杂改性。本文综述了各种掺杂研究,按照掺杂位置分别总结了Pr位、Ba位、Co位和O位的掺杂元素和掺杂量,结合钙钛矿的容忍因子,讨论了掺杂对PrBaCo_2O5+δ性能的影响,包括晶体结构、氧的非化学计量δ、电导率、热膨胀系数、氧传输性能和电化学性能等。
Abstract：The performance of solid oxide fuel cell(SOFC) as a clean and efficient energy conversion device is often restricted due to the oxygen reduction reaction at cathode. As a potential cathode electrocatalyst, cobalt based double perovskite oxide, namely PrBaCo_2O5+δ, has a high oxygen surface exchange coefficient and a great bulk diffusion coefficient. However, the physical and chemical properties(i.e., thermal expansion behavior) should be optimized to improve the electrochemical activity and durability as applying PrBaCo_2O5+δ into SOFC. Therefore, recent work is devoted to modifying PrBaCo_2O5+δ by element doping. This review summarized various element doping approaches, i.e., doping to the Pr site, Ba site, Co site, and O site. In addition, the doping effect on the PrBaCo_2O5+δ properties(i.e., phase structure, oxygen nonstoichiometry δ, electronic conductivity, oxygen transport properties and electrochemical performances) was also discussed.
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基本信息:
DOI：10.14062/j.issn.0454-5648.20200279
中图分类号:TB34;TM911.4
引用信息:
[1]万艳红,邹先泽,张少威,等.固体氧化物燃料电池双钙钛矿阴极材料PrBaCo_2O_(5+δ)的掺杂改性[J].硅酸盐学报,2021,49(01):113-125.DOI:10.14062/j.issn.0454-5648.20200279.
基金信息:
国家自然科学基金(51972298); 安徽壹石通材料科技股份有限公司资助(2016340022003195,2019340022000312)
2020-12-17
2020-12-17
2020-12-17