Multifunctional Effect of Fe Substitution in Na Layered Cathode Materials for Enhanced Storage Stability.

Autor: Park J; Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States., Ku K; Department of Materials Science and Engineering, Hanbat National University, Yuseong-Gu, Daejeon 34158, Republic of Korea., Gim J; Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States., Son SB; Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States., Jeong H; Materials Science Division, Argonne National Laboratory, Lemont, Illinois 60439, United States., Cheng L; Materials Science Division, Argonne National Laboratory, Lemont, Illinois 60439, United States., Iddir H; Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States., Hou D; Micron School of Materials Science and Engineering, Boise State University, Boise, Idaho 83725, United States.; Center for Nanoscale Materials, Argonne National Laboratory, Lemont, Illinois 60439, United States., Xiong H; Micron School of Materials Science and Engineering, Boise State University, Boise, Idaho 83725, United States., Liu Y; Center for Nanoscale Materials, Argonne National Laboratory, Lemont, Illinois 60439, United States., Lee E; Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States., Johnson C; Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States.
Jazyk: angličtina
Zdroj: ACS applied materials & interfaces [ACS Appl Mater Interfaces] 2023 Aug 16; Vol. 15 (32), pp. 38454-38462. Date of Electronic Publication: 2023 Aug 01.
DOI: 10.1021/acsami.3c07068
Abstrakt: Developing stable cathode materials that are resistant to storage degradation is essential for practical development and industrial processing of Na-ion batteries as many sodium layered oxide materials are susceptible to hygroscopicity and instability upon exposure to ambient air. Among the various layered compounds, Fe-substituted O3-type Na(Ni 1/2 Mn 1/2 ) 1- x Fe x O 2 materials have emerged as a promising option for high-performance and low-cost cathodes. While previous reports have noted the decent air-storage stability of these materials, the role and origin of Fe substitution in improving storage stability remain unclear. In this study, we investigate the air-resistant effect of Fe substitution in O3-Na(Ni 1/2 Mn 1/2 ) 1- x Fe x O 2 cathode materials by performing systematic surface and structural characterizations. We find that the improved storage stability can be attributed to the multifunctional effect of Fe substitution, which forms a surface protective layer containing an Fe-incorporated spinel phase and decreases the thermodynamical driving force for bulk chemical sodium extraction. With these mechanisms, Fe-containing cathodes can suppress the cascades of cathode degradation processes and better retain the electrochemical performance after air storage.
Databáze: MEDLINE
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