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Issue 4, 2017
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New insight into Li/Ni disorder in layered cathode materials for lithium ion batteries: a joint study of neutron diffraction, electrochemical kinetic analysis and first-principles calculations

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Abstract

Although layered cathode materials LiNixMnyCo1−xyO2 have attracted much attention due to their number of advantages, the issue of Li/Ni disorder seriously restricts their electrochemical properties. It is very important and pivotal for the better optimization of layered cathode materials to clearly explain the detailed relationships among the Li/Ni disorder, Li+ migration resistance, electrochemical kinetics and electrochemical properties. Here we focus on the LiNixMnyCo1−xyO2 cathode material and report relationships among the crystal structures, Li+ migration resistance, electrochemical kinetics and electrochemical properties by combining neutron diffraction techniques, electrochemical kinetic analysis techniques and first-principles calculation methods. The results suggest that more Li+/Ni2+ ion exchange will shrink the inter-slab space thickness, causing a higher Li+ ion migration barrier and inferior electrochemical kinetics, all of which should be responsible for the limited electrochemical properties.

Graphical abstract: New insight into Li/Ni disorder in layered cathode materials for lithium ion batteries: a joint study of neutron diffraction, electrochemical kinetic analysis and first-principles calculations

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Publication details

The article was received on 29 Sep 2016, accepted on 05 Dec 2016 and first published on 05 Dec 2016


Article type: Paper
DOI: 10.1039/C6TA08448F
J. Mater. Chem. A, 2017,5, 1679-1686

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    New insight into Li/Ni disorder in layered cathode materials for lithium ion batteries: a joint study of neutron diffraction, electrochemical kinetic analysis and first-principles calculations

    E. Zhao, L. Fang, M. Chen, D. Chen, Q. Huang, Z. Hu, Q. Yan, M. Wu and X. Xiao, J. Mater. Chem. A, 2017, 5, 1679
    DOI: 10.1039/C6TA08448F

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