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A comprehensive study of the role of transition metals in O3-type layered Na[NixCoyMnz]O-2 (x=1/3, 0.5, 0.6, and 0.8) cathodes for sodium-ion batteries

Title
A comprehensive study of the role of transition metals in O3-type layered Na[NixCoyMnz]O-2 (x=1/3, 0.5, 0.6, and 0.8) cathodes for sodium-ion batteries
Author
황장연
Keywords
ELECTROCHEMICAL PROPERTIES; HIGH-ENERGY; OXIDE CATHODES; HIGH-CAPACITY; ELECTRODE; PERFORMANCE
Issue Date
2016-12
Publisher
ROYAL SOC CHEMISTRY
Citation
JOURNAL OF MATERIALS CHEMISTRY A, v. 4, Issue 46, Page.17952-17959
Abstract
A comprehensive study of Na[NixCoyMnz]O-2 (x = 1/3, 0.5, 0.6, and 0.8) cathodes is carried out to determine the optimal composition as the electrochemical, structural, and thermal properties of O3-type layered cathodes are strongly dependent on the transition metal composition. Here, the role of each transition metal in [NixCoyMnz]O-2 cathodes is identified via electrochemical property characterization, structural analysis, and thermal stability testing. Briefly, an increase of the Ni fraction resulted in an increasingly higher capacity but is accompanied by progressively poor capacity retention. On the other hand, the Co metal played an important role in stabilizing the structure, while the Mn content contributed to enhancing the capacity retention and thermal stability. The present study highlights the importance of appropriately balancing the transition metal composition in a layered Na[NixCoyMnz]O-2 cathode. Furthermore, this work provides a design guideline for developing an ideal Na[NixCoyMnz]O-2 cathode with both high capacity and optimal cycle retention in addition to thermal stability.
URI
https://pubs.rsc.org/en/Content/ArticleLanding/2016/TA/C6TA07392A#!divAbstracthttps://repository.hanyang.ac.kr/handle/20.500.11754/101761
ISSN
2050-7488; 2050-7496
DOI
10.1039/c6ta07392a
Appears in Collections:
CENTER FOR CREATIVE CONVERGENCE EDUCATION[S](창의융합교육원) > ETC
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