Singh, Preetam ; Patel, Monalisa ; Gupta, Asha ; Bhattacharyya, Aninda J. ; Hegde, M. S. (2012) Sonochemical synthesis of Pt ion substituted TiO2 (Ti0.9Pt0.1O2): a high capacity anode material for lithium battery Journal of the Electrochemical Society, 159 (8). A1189-A1197. ISSN 0013-4651
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Official URL: http://jes.ecsdl.org/content/159/8/A1189.abstract
Related URL: http://dx.doi.org/10.1149/2.029208jes
Abstract
Doping of TiO2 with a suitable metal ion where dopant redox potential couples with that of titanium (Ti4+) and act as catalyst for additional reduction of Ti4+ to Ti2+ (Ti4+→Ti3+→Ti2+) is envisaged here to enhance lithium storage even higher than one Li/TiO2. Accordingly, 10 atom% Pt ion substituted TiO2, Ti0.9Pt0.1O2 nanocrystallites was synthesized by sonochemical method using diethylenetriamine (DETA) as complexing agent. Powder X-ray diffraction pattern (XRD), Rietveld refinement and TEM study reveals that Ti0.9Pt0.1O2 nanocrystallites of ∼4 nm size crystallize in anatase structure. X-ray photo-electron spectroscopy (XPS) study confirms that and both Ti and Pt are in 4+ oxidation state. Due to Pt4+ ion substitution in TiO2, reducibility of TiO2 was enhanced and Ti4+ was reduced up to Ti2+ state via coupling of Pt states (Pt4+/Pt2+/Pt0) with Ti states (Ti4+/Ti3+/Ti2+). Galvanostatic cycling of Ti0.9Pt0.1O2 against lithium showed very high capacity of 430 mAhg−1 or exchange of ∼1.5Li/Ti0.9Pt0.1O2.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to The Electrochemical Society. |
| ID Code: | 108981 |
| Deposited On: | 22 Dec 2017 10:12 |
| Last Modified: | 22 Dec 2017 10:12 |
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