Effect of nickel and iron on structural and electrochemical properties of O3 type layer cathode materials for sodium-ion batteries

Jang Yeon Hwang, Seung Taek Myung, Doron Aurbach, Yang Kook Sun

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62 Scopus citations

Abstract

We investigate that the effect of Ni and Fe contents on structural and electrochemical properties of O3-type layered Na[Ni0.75-xFexMn0.25]O2 (x = 0.4, 0.45, 0.5, and 0.55) in which Mn is fixed at 25%. As increasing the Ni contents, the capacities are gradually higher while the capacity retention and thermal properties are inferior. When Fe contents are increased, by contrast, the electrode exhibits stable capacity retention and satisfactory thermal stability although the resulting capacity slightly decreases. Structural investigation of post cycled electrodes indicate that lattice variation is greatly suppressed from x = 0.5 in Na[Ni0.75-xFexMn0.25]O2. This indicates that an appropriate amount of Fe into the Na[Ni0.75-xFexMn0.25]O2 stabilizes the crystal structure and this leads to the good cycling performances. Also, the better structural stability obtained by Fe addition is responsible for the less heat generation at elevated temperature for the desodiated Na1-δ[Ni0.75-xFexMn0.25]O2 (x = 0.4, 0.45, 0.5, and 0.55) caused by less evaporation of oxygen from the crystal structure.

Original languageEnglish
Pages (from-to)106-112
Number of pages7
JournalJournal of Power Sources
Volume324
DOIs
StatePublished - 30 Aug 2016

Bibliographical note

Publisher Copyright:
© 2016 Elsevier B.V. All rights reserved.

Funding

This work was supported by the Global Frontier R&D Program ( 2013M3A6B1078875 ) on Center for Hybrid Interface Materials (HIM) funded by the Ministry of Science, ICT and Future Planning and by the Human Resources Development program (No. 20154010200840 ) of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea government Ministry of Trade, Industry and Energy .

FundersFunder number
Global Frontier R&D Program2013M3A6B1078875
HIM
Ministry of Trade, Industry and Energy
Ministry of Science, ICT and Future Planning20154010200840
Korea Institute of Energy Technology Evaluation and Planning
Global Frontier Hybrid Interface Materials

    Keywords

    • Cathode material
    • Layered structure
    • O3-type
    • Oxalate
    • Sodium ion battery

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