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dc.contributor.authorChu, Shiyongen_US
dc.contributor.authorChen, Yuboen_US
dc.contributor.authorWang, Jieen_US
dc.contributor.authorDai, Jieen_US
dc.contributor.authorLiao, Kaimingen_US
dc.contributor.authorZhou, Weien_US
dc.contributor.authorShao, Zongpingen_US
dc.identifier.citationChu, S., Chen, Y., Wang, J., Dai, J., Liao, K., Zhou, W. & Shao, Z. (2018). A cobalt and nickel co-modified layered P2-Na2/3Mn1/2Fe1/2O2 with excellent cycle stability for high-energy density sodium-ion batteries. Journal of Alloys and Compounds, 775, 383-392.
dc.description.abstractConsidering the abundant sodium resources, sodium-ion batteries (SIBs) demonstrate great potential in large-scale electrochemical energy storage sectors which capacity and cycle stability is highly dependent on their electrode materials. Layered P2-type Mn-Fe-based oxide has been considered as one of the most promising cathodes for SIBs, while its unsatisfactory cycle performance and low energy density strongly limit practical application. Here, a Co/Ni modification strategy is proposed to optimize P2-Na2/3Mn1/2Fe1/2O2 (MF) from both aspects of reversible capacity and cycle stability, leading to the design of a new P2-Na2/3Mn1/2Fe1/4Co1/8Ni1/8O2 (MFCN). In this new layered P2-type material, the introduction of Co effectively inhibits the irreversibility of the material, and the introduction of Ni relieves the Jahn-Teller effect and reduces Mn dissolution. The simultaneous introduction of Co and Ni effectively improves the cycle stability of the electrode, indicated by the increase of the capacity retention rate from 51.5% for MF to 87.4% for MFCN over 100 discharge-charge cycles at the same current density of 130 mA g−1. Meanwhile, the introduction of Ni effectively increases the discharge voltage with the middle discharge voltage increasing from 2.8 V (MF) to 3.3 V (MFCN), thereby improving the energy density of the electrode. All above features make the new material highly promising for use as a cathode material in practical SIBs.en_US
dc.relation.ispartofJournal of Alloys and Compoundsen_US
dc.rights© 2018 Published by Elsevier B.V. All rights reserved.en_US
dc.titleA cobalt and nickel co-modified layered P2-Na2/3Mn1/2Fe1/2O2 with excellent cycle stability for high-energy density sodium-ion batteriesen_US
dc.typeJournal Articleen
dc.contributor.schoolSchool of Materials Science and Engineeringen_US
dc.subject.keywordsSodium Ion Batteriesen_US
dc.subject.keywordsLayered Cathodeen_US
dc.description.acknowledgementThis work was financially supported by the National Key R&D Program of China (Grant No. 2018YFB0905400), the Six Talent Peaks Project of Jiangsu Province (Grant No. XNY-CXTD-001), Jiangsu Natural Science Foundation for Distinguished Young Scholars (Grant No. BK20170043).en_US
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