LiCo1-yAlyO2双导电解质在全金属氧化物锂基低温固体氧化物燃料电池中的应用

IF 5.6 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International Pub Date : 2025-08-01 DOI:10.1016/j.ceramint.2025.04.358

Yongtao Huang , Ying Li , Wenzhu Tan , Jie Zheng , Zezhong Wang , Wei Zhang , Chunsheng Zhuang

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引用次数: 0

摘要

本研究利用经典锂离子材料al掺杂LiCoO2 （LiCo1-yAlyO2(0.3≤y≤0.7)）设计了双导电性电解质，探索了其晶体结构、形貌和电化学性能，并研究了在此基础上构建的低温（<600℃）固体氧化物燃料电池（LT-SOFCs）的电化学机理和性能。结果表明，当Co: Al为0.5:0.5时，电池在460、490、520和550℃的H2/air气氛下的最大功率密度分别为290、583,681和738 mW/cm2，电池性能最佳。在相同条件下，LiCo0.5Al0.5O2电解质的离子电导率分别为0.065、0.186、0.215和0.22 S/cm。进一步，从输运数的角度分析了LiCo0.5Al0.5O2材料的输运机理，并利用质子和氧离子隔离层证实了LiCo0.5Al0.5O2的O2−/H+双电导率行为。综上所述，LiCo0.5Al0.5O2可以作为LT-SOFC的候选电解质，使用锂离子电池材料作为电解质可能为获得高性能LT-SOFC提供新的思路。

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Application of LiCo1-yAlyO2 dual-conducting electrolytes in all-lithium metal oxide-based low-temperature solid oxide fuel cells

In this study, a dual-conductivity electrolyte was designed using the classic lithium-ion material Al-doped LiCoO₂ (LiCo_1-yAl_yO₂ (0.3 ≤ y ≤ 0.7)), and its crystal structure, morphology, and electrochemical properties were explored, and the electrochemical mechanism and performance of low-temperature (<600 °C) solid oxide fuel cells (LT-SOFCs) constructed based on it were studied. The results showed that the optimal performance of the cell could be achieved when Co: Al was 0.5:0.5, and the maximum power densities of the cell were 290, 583, 681, and 738 mW/cm² in H₂/air atmospheres at 460, 490, 520, and 550 C, respectively. The ionic conductivities corresponding to the LiCo_0.5Al_0.5O₂ electrolyte under the same conditions were 0.065, 0.186, 0.215, and 0.22 S/cm, respectively. Furthermore, the transport mechanism of LiCo_0.5Al_0.5O₂ material was analyzed from the perspective of transport number, and the O²⁻/H⁺ dual conductivity behavior of LiCo_0.5Al_0.5O₂ was confirmed using proton and oxygen ion isolation layers. According to the above results, LiCo_0.5Al_0.5O₂ may serve as a promising candidate electrolyte for LT-SOFC, and using Li-ion battery materials as electrolytes may shed new light on obtaining high-performance LT-SOFC.

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来源期刊

Ceramics International 工程技术-材料科学：硅酸盐

CiteScore

9.40

自引率

15.40%

发文量

4558

审稿时长

25 days

期刊介绍： Ceramics International covers the science of advanced ceramic materials. The journal encourages contributions that demonstrate how an understanding of the basic chemical and physical phenomena may direct materials design and stimulate ideas for new or improved processing techniques, in order to obtain materials with desired structural features and properties. Ceramics International covers oxide and non-oxide ceramics, functional glasses, glass ceramics, amorphous inorganic non-metallic materials (and their combinations with metal and organic materials), in the form of particulates, dense or porous bodies, thin/thick films and laminated, graded and composite structures. Process related topics such as ceramic-ceramic joints or joining ceramics with dissimilar materials, as well as surface finishing and conditioning are also covered. Besides traditional processing techniques, manufacturing routes of interest include innovative procedures benefiting from externally applied stresses, electromagnetic fields and energetic beams, as well as top-down and self-assembly nanotechnology approaches. In addition, the journal welcomes submissions on bio-inspired and bio-enabled materials designs, experimentally validated multi scale modelling and simulation for materials design, and the use of the most advanced chemical and physical characterization techniques of structure, properties and behaviour. Technologically relevant low-dimensional systems are a particular focus of Ceramics International. These include 0, 1 and 2-D nanomaterials (also covering CNTs, graphene and related materials, and diamond-like carbons), their nanocomposites, as well as nano-hybrids and hierarchical multifunctional nanostructures that might integrate molecular, biological and electronic components.