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

Journal of Materials Chemistry A Volume 7 Page 25290-25296 published_at 2019-09-04
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Title ( eng )
Microparticles with hetero-nanointerfaces: controlled assembly of cobalt hydroxide and nickel hydroxide nanoclusters towards improved electrochemical functions
Creator
Tokudome Yasuaki
Jobbágy Matías
Soler-Illia Galo J. A. A.
Takahashi Masahide
Source Title
Journal of Materials Chemistry A
Volume 7
Start Page 25290
End Page 25296
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, or energy storage or production. Fabrication and co-assembly of a variety of nanostructured colloids is a promising way to design the interface of materials in nano-scale toward high functionality. In this study, we demonstrate a synthesis of colloids of nanocluster-sized (~ 2 nm) cobalt and nickel hydroxides and their assembly into microparticles that present hetero-nanointerfaces. 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 mAh/g) compared with respective microparticles with homo-nanointerface (cobalt hydroxide; 15.8 mAh/g: nickel hydroxide; 64.4 mAh/g). Further investigation suggests that the introduced hetero-nanointerface leads to lower charge transfer resistance and to improved electrochemical properties. The synthetic concept demonstrated here is expected to create unique hetero-nanointerfaces for various materials with wide-range of chemical composition towards improved and novel functionalities.
Descriptions
The present work is partially supported by JSPS KAKENHI, LNLS proposal SAXS1 18927, ANPCyT (PICT 2087), UBACyT (20020130100610BA), Izumi Science and Technology Foundation (H29-J-130) and the Foundation for the Promotion of Ion Engineering.
Language
eng
Resource Type journal article
Publisher
Royal Society of Chemistry
Date of Issued 2019-09-04
Rights
This is not the published version. Please cite only the published version. この論文は出版社版ではありません。引用の際には出版社版をご確認、ご利用ください。
Publish Type Author’s Original
Access Rights open access
Source Identifier
[ISSN] 2050-7496
[DOI] 10.1039/C9TA07141E
[DOI] https://doi.org/10.1039/C9TA07141E