Advanced Materials

Nanoporous Walls on Macroporous Foam: Rational Design of Electrodes to Push Areal Pseudocapacitance

Authors

  • Cao Guan,

    1. Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
    2. Energy Research Institute @ NTU (ERIAN), Nanyang Technological University, 50 Nanyang Drive, Singapore 637553, Singapore
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  • Xianglin Li,

    1. Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
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  • Zilong Wang,

    1. Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
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  • Xiehong Cao,

    1. School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
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  • Cesare Soci,

    1. Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
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  • Hua Zhang,

    1. School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
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  • Hong Jin Fan

    Corresponding author
    1. Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
    2. Energy Research Institute @ NTU (ERIAN), Nanyang Technological University, 50 Nanyang Drive, Singapore 637553, Singapore
    • Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore.
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Abstract

For application as a pseudocapacitor electrode, highly porous CoO nanowalls are fabricated directly on 3D macroporous nickel foam (see images). A relatively high areal capacitance is achieved because of the porous structure. By grafting the porous nanowalls with another pseudocapacitive oxide, the areal capacitance can be further significantly boosted, owing to the increased surface area caused by the hierarchically porous structure as well as a possible synergetic effect between the two oxides.

original image

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