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Issue 39, 2018
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The nickel battery positive electrode revisited: stability and structure of the β-NiOOH phase

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Abstract

The crystal structure of the nickel battery positive electrode material, β-NiOOH, is analyzed through a joint approach involving NMR and FTIR spectroscopies, powder neutron diffraction and DFT calculations. The obtained results confirm that structural changes occur during the β-Ni(OH)2/β-NiOOH transformation leading to a metastable crystal structure with a TP2 host lattice. This structure involves two types of hydrogen atoms both forming primary and secondary hydrogen bonds. The formation of TP2 NiOOH as opposed to the more stable P3 host type during β-Ni(OH)2/β-NiOOH transformation has a kinetic origin that can be understood by a lower strain penalty involved in the transformation.

Graphical abstract: The nickel battery positive electrode revisited: stability and structure of the β-NiOOH phase

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Publication details

The article was received on 01 Aug 2018, accepted on 26 Sep 2018 and first published on 26 Sep 2018


Article type: Paper
DOI: 10.1039/C8TA07460G
J. Mater. Chem. A, 2018,6, 19256-19265

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    The nickel battery positive electrode revisited: stability and structure of the β-NiOOH phase

    M. Casas-Cabanas, M. D. Radin, J. Kim, C. P. Grey, A. Van der Ven and M. R. Palacín, J. Mater. Chem. A, 2018, 6, 19256
    DOI: 10.1039/C8TA07460G

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