Mixed alkali-ion transport and storage in atomic-disordered honeycomb layered NaKNi2TeO6
| Autor: | Masatomo Yashima, Titus Masese, Toshiyuki Matsunaga, Miyu Ito, Chih-Yao Chen, Keigo Kubota, Masahiro Shikano, Yoshinobu Miyazaki, Hiroki Ubukata, Yoshiharu Uchimoto, Godwill Mbiti Kanyolo, Abbas Alshehabi, Tomohiro Saito, Tamio Ikeshoji, Cédric Tassel, Zhen-Dong Huang, Kazuhiko Matsumoto, Hiroshi Senoh, Kartik Sau, Rika Hagiwara, Hiroshi Kageyama, Josef Rizell, Teruo Takahashi, Jinkwang Hwang, Kazuki Yoshii, Kotaro Fujii |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Science Analytical chemistry Oxide Stacking General Physics and Astronomy FOS: Physical sciences 02 engineering and technology Electrolyte 010402 general chemistry Electrochemistry Two-dimensional materials 01 natural sciences General Biochemistry Genetics and Molecular Biology Article Ion chemistry.chemical_compound Batteries Condensed Matter - Materials Science Multidisciplinary Materials Science (cond-mat.mtrl-sci) General Chemistry Solid-state chemistry 021001 nanoscience & nanotechnology Alkali metal 0104 chemical sciences Condensed Matter - Other Condensed Matter chemistry Electrode Ionic liquid 0210 nano-technology Transmission electron microscopy Other Condensed Matter (cond-mat.other) |
| Zdroj: | Nature Communications, Vol 12, Iss 1, Pp 1-16 (2021) Nature Communications |
| ISSN: | 2041-1723 |
| Popis: | Honeycomb layered oxides constitute an emerging class of materials that show interesting physicochemical and electrochemical properties. However, the development of these materials is still limited. Here, we report the combined use of alkali atoms ($\rm Na$ and $\rm K$) to produce a mixed alkali honeycomb layered oxide material, namely, $\rm NaKNi_2TeO_6$. Via transmission electron microscopy measurements, we reveal the local atomic structural disorders characterised by aperiodic stacking and incoherency in the alternating arrangement of $\rm Na$ and $\rm K$ atoms. We also investigate the possibility of mixed electrochemical transport and storage of $\rm Na$ and $\rm K$ ions in $\rm NaKNi_2TeO_6$. In particular, we report an average discharge cell voltage of about $4\, \rm V$ and a specific capacity of around $80\, \rm mAh\, g^{-1}$ at low specific currents (i.e., $< 10\, \rm mA\, g^{-1}$) when a $\rm NaKNi_2TeO_6$-based positive electrode is combined with a room-temperature $\rm NaK$ liquid alloy negative electrode using an ionic liquid-based electrolyte solution. These results represent a step towards the use of tailored cathode active materials for dendrite-free electrochemical energy storage systems exploiting room-temperature liquid alkali metal alloy materials. 39 Pages, 7 Figures, 1 Cover Art |
| Databáze: | OpenAIRE |
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