| Autor: |
Hiroyuki USUI, Yasuhiro DOMI, Thi Hay NGUYEN, Shin-ichiro IZAKI, Kei NISHIKAWA, Toshiyuki TANAKA, Hiroki SAKAGUCHI |
| Jazyk: |
angličtina |
| Rok vydání: |
2022 |
| Předmět: |
|
| Zdroj: |
Electrochemistry, Vol 90, Iss 3, Pp 037002-037002 (2022) |
| Druh dokumentu: |
article |
| ISSN: |
2186-2451 |
| DOI: |
10.5796/electrochemistry.22-00004 |
| Popis: |
The crystal structure and Li storage properties of Cu-doped rutile TiO2 after a phase change caused by lithiation were investigated for the first time. Structural analysis results confirmed that undoped rutile TiO2 was transformed to a distorted layered rock-salt LixTiO2 structure with a small volume expansion of only 1 % when cycled in a potential range of 1.0–3.0 V vs. Li+/Li. A substitutional solid solution of Cu2+ was formed in layered LixTiO2. The Cu doping increased both the interlayer distance and electronic conductivity of the layered LixTiO2. As an Li-ion battery anode, a Cu-doped TiO2 electrode exhibited a long cycle life, maintaining a reversible capacity of 120 mAh g−1 over 10000 cycles at 5C and an excellent rate capability of 108 mAh g−1 at 50C. Furthermore, this electrode could also be potentially used as a Na storage material. These attractive properties demonstrate high applicability of Cu-doped rutile TiO2 as a novel anode material. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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