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Microparticles with hetero-nanointerfaces: controlled assembly of cobalt hydroxide and nickel hydroxide nanoclusters towards improved electrochemical functions

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Abstract

The ultimate control of the interfaces of nanocomposite materials is essential to tailor and improve their physical/chemical properties in applications such as catalysis and energy storage and production. Fabrication and co-assembly of a variety of nanostructured colloids are promising ways to design the interface of materials in the nano-scale toward high functionality. In this study, we demonstrate the synthesis of colloids of nanocluster-sized (∼2 nm) cobalt and nickel hydroxides and their assembly into microparticles that present hetero-nanointerfaces. The electrochemical properties were investigated to elucidate the effect of the hetero-nanointerface. Microparticles with hetero nanostructures composed of cobalt and nickel hydroxide nanoclusters revealed improved mass specific capacity (91.4 mA h g−1) compared with the respective microparticles with homo-nanointerfaces (cobalt hydroxide, 15.8 mA h g−1; nickel hydroxide, 64.4 mA h g−1). Further investigation suggests that the introduced hetero-nanointerface leads to lower charge transfer resistance and improved electrochemical properties. The synthetic concept demonstrated here is expected to create unique hetero-nanointerfaces for various materials with a wide-range of chemical compositions towards improved and novel functionalities.

Graphical abstract: Microparticles with hetero-nanointerfaces: controlled assembly of cobalt hydroxide and nickel hydroxide nanoclusters towards improved electrochemical functions

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Publication details

The article was received on 03 Jul 2019, accepted on 31 Aug 2019 and first published on 04 Sep 2019


Article type: Paper
DOI: 10.1039/C9TA07141E
J. Mater. Chem. A, 2019, Advance Article

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    Microparticles with hetero-nanointerfaces: controlled assembly of cobalt hydroxide and nickel hydroxide nanoclusters towards improved electrochemical functions

    N. Tarutani, Y. Tokudome, M. Jobbágy, G. J. A. A. Soler-Illia and M. Takahashi, J. Mater. Chem. A, 2019, Advance Article , DOI: 10.1039/C9TA07141E

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