Performance analysis of LiAl0.5Co0.5O2 nanosheets for intermediate-temperature fuel cells. (29th July 2021)

• Record Type: Journal Article
• Authors: Paydar, Sara; Peng, Jin; Huang, Liwen; Shi, Quan; Akbar, Nabeela; Islam, Quazi Arif; Muhammad, Akbar; Xing, Yueming; Kim, Jung-Sik; Wu, Yan
• Is Part Of: International journal of hydrogen energy. Volume 46:Number 52(2021)
• Page Start: 26478
• Page End: 26488
• Publication Date: 2021-07-29
• Subjects: LiAl0.5Co0.5O2 -- Nanosheets -- Proton/Li+ conductor -- Intermediate-temperature fuel cells -- Kelvin probe force microscopy; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2021.05.108
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: Exploring high conductive materials is still a challenge for high performance intermediate-temperature fuel cells. In this study, two-dimensional LiAl0.5 Co0.5 O2 (LACO) nanosheets coated by a compatible amorphous LiAlO2 (LAO) layer are evaluated as proton/Li + conductor electrolyte. The fuel cell in which the LAO-LACO is used as electrolyte could deliver the maximum power output of 1120 mW cm −2 at 550 °C. The LAO coating enhances not only the ionic conductivity by modifying the space-charge regions, but also improves the LACO's chemical stability and device performance. Kelvin probe force microscopy further detected a local electric field (LEF) built in the LAO-LACO coating confines protons at the interface to transport fast. Such heterostructure with the LEF accelerating mechanism presents a novel approach for developing high-performance intermediate-temperature fuel cells. Highlights: LACO nanosheets coated by LAO was developed as the functional electrolyte for PCFCs. Fuel cell based on LACO modified by LAO achieves a maximum performance of 1120 mW cm −2 at 550 °C. A local electric field (LEF) built in the LACO modified by LAO exhibits a H+/Li + ionconductance at the interface.