Mixed alkali-ion transport and storage in atomic-disordered honeycomb layered NaKNi2TeO6
Artikel i vetenskaplig tidskrift, 2021

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 (Na and K) to produce a mixed-alkali honeycomb layered oxide material, namely, NaKNi2TeO6. Via transmission electron microscopy measurements, we reveal the local atomic structural disorders characterised by aperiodic stacking and incoherency in the alternating arrangement of Na and K atoms. We also investigate the possibility of mixed electrochemical transport and storage of Na+ and K+ ions in NaKNi2TeO6. In particular, we report an average discharge cell voltage of about 4 V and a specific capacity of around 80 mAh g–1 at low specific currents (i.e., < 10 mA g–1) when a NaKNi2TeO6-based positive electrode is combined with a room-temperature 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.

Författare

Titus Masese

Kyoto University

National Institute of Advanced Industrial Science and Technology (AIST)

Yoshinobu Miyazaki

Sumika Chemical Analysis Service (SCAS)

Josef Rizell

National Institute of Advanced Industrial Science and Technology (AIST)

Chalmers, Fysik, Materialfysik

Godwill Mbiti Kanyolo

University of Electro-Communications

Chih Yao Chen

Kyoto University

Hiroki Ubukata

Kyoto University

Keigo Kubota

Kyoto University

Kartik Sau

National Institute of Advanced Industrial Science and Technology (AIST)

Tohoku University

Tamio Ikeshoji

Tohoku University

Zhen Dong Huang

Nanjing University of Posts and Telecommunications

Kazuki Yoshii

National Institute of Advanced Industrial Science and Technology (AIST)

Teruo Takahashi

Sumika Chemical Analysis Service (SCAS)

Miyu Ito

Sumika Chemical Analysis Service (SCAS)

Hiroshi Senoh

National Institute of Advanced Industrial Science and Technology (AIST)

Jinkwang Hwang

Kyoto University

Abbas Alshehabi

National Institute of Technology (KOSEN)

Kazuhiko Matsumoto

Kyoto University

Toshiyuki Matsunaga

Kyoto University

Kotaro Fujii

Tokyo Institute of Technology

Masatomo Yashima

Tokyo Institute of Technology

Masahiro Shikano

National Institute of Advanced Industrial Science and Technology (AIST)

Cédric Tassel

Kyoto University

Hiroshi Kageyama

Kyoto University

Yoshiharu Uchimoto

Kyoto University

Rika Hagiwara

Kyoto University

Tomohiro Saito

Sumika Chemical Analysis Service (SCAS)

Nature Communications

2041-1723 (ISSN)

Vol. 12 1 4660

Ämneskategorier

Oorganisk kemi

Materialkemi

Annan kemi

Styrkeområden

Materialvetenskap

DOI

10.1038/s41467-021-24694-5

PubMed

34341351

Mer information

Senast uppdaterat

2021-08-20