Nanotube-structured Na2V3O7 as a Cathode Material for Sodium-Ion Batteries with High-rate and Stable Cycle Performances

Naoto Tanibata; Yuki Kondo; Shohei Yamada; Masaki Maeda; Hayami Takeda; Masanobu Nakayama; Toru Asaka; Ayuko Kitajou; Shigeto Okada

doi:10.1038/s41598-018-35608-9

Nanotube-structured Na₂V₃O₇ as a Cathode Material for Sodium-Ion Batteries with High-rate and Stable Cycle Performances

Sci Rep. 2018 Nov 21;8(1):17199. doi: 10.1038/s41598-018-35608-9.

Authors

Naoto Tanibata^{1

2}, Yuki Kondo³, Shohei Yamada³, Masaki Maeda³, Hayami Takeda^{3

4}, Masanobu Nakayama^{3

4

5

6

7}, Toru Asaka^{3

5}, Ayuko Kitajou^{4

8}, Shigeto Okada^{4

9}

Affiliations

¹ Department of Advanced Ceramics, Nagoya Institute of Technology, Gokiso, Showa, Nagoya, Aichi, 466-8555, Japan. tanibata.naoto@nitech.ac.jp.
² Elements Strategy Initiative for Catalysts and Batteries (ESICB), Kyoto University, 1-30 Goryo-Ohara, Nishikyo, Kyoto, 615-8245, Japan. tanibata.naoto@nitech.ac.jp.
³ Department of Advanced Ceramics, Nagoya Institute of Technology, Gokiso, Showa, Nagoya, Aichi, 466-8555, Japan.
⁴ Elements Strategy Initiative for Catalysts and Batteries (ESICB), Kyoto University, 1-30 Goryo-Ohara, Nishikyo, Kyoto, 615-8245, Japan.
⁵ Frontier Research Institute for Materials Science (FRIMS), Nagoya Institute of Technology, Gokiso, Showa, Nagoya, Aichi, 466-8555, Japan.
⁶ Center for Materials research by Information Integration (CMI2), Research and Services Division of Materials Data and Integrated System (MaDIS), National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba, Ibaraki, 305-0047, Japan.
⁷ Global Research Center for Environment and Energy based on Nanomaterials Science (GREEN), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki, 305-0047, Japan.
⁸ Organization for Research Initiatives, Yamaguchi University, 2-16-1, Ube, 755-8611, Tokiwadai, Japan.
⁹ Institute for Materials Chemistry and Engineering, Kyushu University, Kasuga koen 6-1, Kasuga, Fukuoka, 816-8580, Japan.

Abstract

Sodium ion batteries meet the demand for large-scale energy storage, such as in electric vehicles, due to the material abundance of sodium. In this report, nanotube-type Na₂V₃O₇ is proposed as a cathode material because of its fast sodium diffusivity, an important requirement for sodium ion batteries, through the investigation of ~4300 candidates via a high-throughput computation. High-rate performance was confirmed, showing ~65% capacity retention at a current density of 10C at room temperature, despite the large particle size of >5 μm. A good cycle performance of ca. 94% in capacity retention after 50 cycles was obtained owing to a small volumetric change of <0.4%.