@article{a3a82db7a04d4888b2fb312998ad3688,
title = "Phenylphosphonate surface functionalisation of MgMn2O4with 3D open-channel nanostructures for composite slurry-coated cathodes of rechargeable magnesium batteries operated at room temperature",
abstract = "Spinel-type MgMn2O4, prepared by a propylene-oxide-driven sol-gel method, has a high surface area and structured bimodal macro- and mesopores, and exhibits good electrochemical properties as a cathode active material for rechargeable magnesium batteries. However, because of its hydrophilicity and significant water adsorption properties, macroscopic aggregates are formed in composite slurry-coated cathodes when 1-methyl-2-pyrrolidone (NMP) is used as a non-aqueous solvent. Functionalising the surface with phenylphosphonate groups was found to be an easy and effective technique to render the structured MgMn2O4hydrophobic and suppress aggregate formation in NMP-based slurries. This surface functionalisation also reduced side reactions during charging, while maintaining the discharge capacity, and significantly improved the coulombic efficiency. Uniform slurry-coated cathodes with active material fractions as high as 93 wt% can be produced on Al foils by this technique employing carbon nanotubes as an electrically conductive support. A coin-type full cell consisting of this slurry-coated cathode and a magnesium alloy anode delivered an initial discharge capacity of ∼100 mA h g−1at 25 °C.",
author = "Koichi Kajihara and Daisuke Takahashi and Hiroaki Kobayashi and Toshihiko Mandai and Hiroaki Imai and Kiyoshi Kanamura",
note = "Funding Information: K. K. and D. T. thank Ms Ayaka Kutsuma of Tokyo Metropolitan University for instructions on the preparation of slurry-coated cathodes, Dr Yukihiro Nakabayashi and Mr Makoto Saito of Tokyo Metropolitan University for assistance with experiments in the Ar-filled glovebox and SEM-EDS observations, and Dr Ryuta Ise of Keio University for fruitful discussion. This work was supported by JST ALCA-SPRING project Grant Number JPMJAL1301, Japan. Funding Information: K. K. and D. T. thank Ms Ayaka Kutsuma of Tokyo Metropolitan University for instructions on the preparation of slurry-coated cathodes, Dr Yukihiro Nakabayashi and Mr Makoto Saito of Tokyo Metropolitan University for assistance with experiments in the Ar-lled glovebox and SEM-EDS observations, and Dr Ryuta Ise of Keio University for fruitful discussion. This work was supported by JST ALCA-SPRING project Grant Number JPMJAL1301, Japan. Publisher Copyright: {\textcopyright} The Royal Society of Chemistry 2021.",
year = "2021",
month = may,
day = "19",
doi = "10.1039/d1ra02598h",
language = "English",
volume = "11",
pages = "19076--19082",
journal = "RSC Advances",
issn = "2046-2069",
publisher = "Royal Society of Chemistry",
number = "31",
}