Zr4+/F– co-doped TiO2(anatase) as high performance anode material for lithium-ion battery
| Autor: | Denis P. Opra, Alexander Yu. Ustinov, Sergey V. Gnedenkov, Alexander A. Sokolov, E. I. Voit, Sergey L. Sinebryukhov, V. V. Zheleznov |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Anatase
Materials science Analytical chemistry 02 engineering and technology Electrolyte 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences Lithium-ion battery 0104 chemical sciences Dielectric spectroscopy Anode symbols.namesake X-ray photoelectron spectroscopy symbols lcsh:TA401-492 General Materials Science lcsh:Materials of engineering and construction. Mechanics of materials 0210 nano-technology Raman spectroscopy |
| Zdroj: | Progress in Natural Science: Materials International, Vol 28, Iss 5, Pp 542-547 (2018) |
| ISSN: | 1002-0071 |
| Popis: | Zr4+ and F– co-doped TiO2 with the formula of Ti0.97Zr0.03O1.98F0.02 was facilely synthesized by a sol-gel template route. The crystal structure, morphology, composition, surface area, and conductivity were characterized by Raman spectroscopy, energy-dispersive X-ray analysis, scanning electron microscopy, Brunauer−Emmett−Teller measurements, X-ray photoelectron spectroscopy, and electrochemical impedance spectroscopy. The results demonstrate that Zr4+ and F– homogeneously incorporated into TiO2, forming solid solution with an anatase structure. Ti0.97Zr0.03O1.98F0.02 shows outstanding electrochemical properties as Li-ion battery anode in comparison with Ti0.97Zr0.03O2. In particular, upon 35-fold cycling at 1C-rate Zr4+/F– co-doped TiO2 delivers a reversible capacity of 163 mAh g–1, whereas Zr4+-doped TiO2 gives only 34 mA h g–1. Additionally, Zr4+/F– co-doped TiO2 retains a capacity of 138 mA h g–1 during cycling even at 10 C. The enhance performance originates from improved conductivity of Zr4+/F– co-doped TiO2 material through generation of Ti3+ (serving as electron donors) into the crystal lattice and, possibly, due to F-doping blocked the anode surface from attack of HF formed as electrolyte decomposition product. Keywords: Li-ion batteries, TiO2(anatase), Anode, Co-doping, Sol-gel template, Process, Electrochemical performance |
| Databáze: | OpenAIRE |
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