Enhanced electrochemical performance of MnFe@NiFe Prussian blue analogue benefited from the inhibition of Mn ions dissolution for sodium-ion batteries
Liao, Xiao Zhen
Ma, Zi Feng
KAUST DepartmentPhysical Science and Engineering (PSE) Division
Online Publication Date2021-01-18
Print Publication Date2021-05
Embargo End Date2023-01-23
Permanent link to this recordhttp://hdl.handle.net/10754/667109
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AbstractSodium manganese hexacyanoferrate (PBM) is one of the most promising cathode materials for sodium-ion batteries due to its high theoretical capacity, high voltage, and low cost. However, its cycling performance is limited by serious Mn ions dissolution during Na+ insertion/extraction. In this work, a facile in situ ion-exchange strategy is developed to synthesize sodium manganese hexacyanoferrate coated by sodium nickel hexacyanoferrate (PBM@PBN). The as-prepared PBM@PBN showed superior cyclic stability and enhanced rate capability. PBM@PBN exhibited a high reversible capacity of 126.9 mAh g−1 (1 C), with a capacity retention of 74.3% after 800 cycles. ICP results proved that superior cyclic stability was attributed to the inhibition of Mn ions dissolution by PBN coating. Besides, PBM@PBN also exhibited enhanced rate capability, and it delivered a high capacity of 87.2 mAh g−1 at 10 C. Ex-situ XRD proved that the PBM@PBN undergoes a reversible structural change (monoclinic ↔ cubic/tetragonal) during the whole cycle. PBN coating inhibited the PBM from suffering serious Mn ions dissolution during Na+ insertion/extraction, thus ensured the framework stability of PBM during long-term cycling and contributed to the excellent electrochemical performance. The simple preparation of PBM@PBN makes it accessible for large-scale applications.
CitationFeng, F., Chen, S., Zhao, S., Zhang, W., Miao, Y., Che, H., … Ma, Z.-F. (2021). Enhanced electrochemical performance of MnFe@NiFe Prussian blue analogue benefited from the inhibition of Mn ions dissolution for sodium-ion batteries. Chemical Engineering Journal, 411, 128518. doi:10.1016/j.cej.2021.128518
SponsorsThis work was supported by the National Key Research and Development Program (2016YFB0901505), the Natural Science Foundation of China (21938005, 21676165, 21573147), the Science & Technology Commission of Shanghai Municipality (19DZ1205500), and Zhejiang Key Research and Development Program (2020C01128). GITT values were automatically calculated with GITT soft (http://www.upub.online/gitt, also follow the EditorTan Wechat). The authors declare no competing financial interest.
JournalChemical Engineering Journal