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Issue 28, 2018
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Nanoporous gyroid Ni/NiO/C nanocomposites from block copolymer templates with high capacity and stability for lithium storage

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Abstract

A nanoporous Ni/NiO/C nanocomposite with a gyroid nanostructure was fabricated by using a nanoporous polymer with gyroid nanochannels as a template. The polymer template was obtained from the self-assembly of a degradable block copolymer, polystyrene-b-poly(L-lactide) (PS-PLLA), followed by the hydrolysis of PLLA blocks. Templated electroless plating followed by calcination was performed to create a precisely controlled Ni/NiO gyroid nanostructure. After carbon coating, a well-interconnected nanoporous gyroid Ni/NiO/C nanocomposite can be successfully fabricated. Benefiting from the well-interconnected nanoporous structure with ultrafine transition metal oxide and uniform carbon coating, the gyroid nanoporous Ni/NiO/C nanocomposite electrodes exhibited high specific capacities at various rates (1240 mA h g−1 at 0.2 A g−1, 902 mA h g−1 at 2 A g−1 and 424 mA h g−1 at 10 A g−1) and excellent cyclability (809 mA h g−1 at 1 A g−1 after 1000 cycles, average coulombic efficiency 99.86%). This research demonstrates a universal approach for constructing a nanostructured electrode with explicitly controlled block copolymer phase separation.

Graphical abstract: Nanoporous gyroid Ni/NiO/C nanocomposites from block copolymer templates with high capacity and stability for lithium storage

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Publication details

The article was received on 03 May 2018, accepted on 14 Jun 2018 and first published on 18 Jun 2018


Article type: Paper
DOI: 10.1039/C8TA04077J
Citation: J. Mater. Chem. A, 2018,6, 13676-13684
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    Nanoporous gyroid Ni/NiO/C nanocomposites from block copolymer templates with high capacity and stability for lithium storage

    C. Cheng, Y. Chen, F. Zou, K. Yang, T. Lin, K. Liu, C. Lai, R. Ho and Y. Zhu, J. Mater. Chem. A, 2018, 6, 13676
    DOI: 10.1039/C8TA04077J

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