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000009424 0247_ $$2ISSN$$a1945-7111
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000009424 084__ $$2WoS$$aElectrochemistry
000009424 084__ $$2WoS$$aMaterials Science, Coatings & Films
000009424 1001_ $$0P:(DE-Juel1)VDB90007$$aBorghols, W.J.H.$$b0$$uFZJ
000009424 245__ $$aLithium Storage in Amorphous TiO2 Nanoparticles
000009424 260__ $$aPennington, NJ$$bElectrochemical Society$$c2010
000009424 300__ $$aA582 - A588
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000009424 440_0 $$03889$$aJournal of the Electrochemical Society$$v157$$x0013-4651$$y5
000009424 500__ $$aWe thank HASYLAB for the provision of beam time and the financial support of our experiments and D. Zajac and D. Novikov for their excellent support at the beam lines. The financial support from the Netherlands Organization for Scientific Research (NWO) for the VIDI grant of M. W. is gratefully acknowledged. NWO is further acknowledged for financing the solid-state NMR facility for advanced material science at the Radboud University. We thank the Alistore network for providing access to TEM measurements and the electrochemical laboratories.
000009424 520__ $$aAmorphous titanium oxide nanoparticles were prepared from titanium isopropoxide. In situ measurements reveal an extraordinary high capacity of 810 mAh/g on the first discharge. Upon cycling at a charge/discharge rate of 33.5 mA/g, this capacity gradually decreases to 200 mAh/g after 50 cycles. The origin of this fading was investigated using X-ray absorption spectroscopy and solid-state nuclear magnetic resonance. These measurements reveal that a large fraction of the total amount of the consumed Li atoms is due to the reaction of H2O/OH species adsorbed at the surface to Li2O, explaining the irreversible capacity loss. The reversible capacity of the bulk, leading to the Li0.5TiO2 composition, does not explain the relatively large reversible capacity, implying that part of Li2O at the TiO2 surface may be reversible. The high reversible capacity, also at large (dis)charge rates up to 3.35 A/g (10C), makes this amorphous titanium oxide material suitable as a low cost electrode material in a high power battery.
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000009424 65320 $$2Author$$aNMR spectroscopy
000009424 65320 $$2Author$$asecondary cells
000009424 65320 $$2Author$$atitanium compounds
000009424 65320 $$2Author$$aX-ray absorption spectra
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000009424 7001_ $$0P:(DE-HGF)0$$aLützenkirchen-Hecht, D.$$b1
000009424 7001_ $$0P:(DE-HGF)0$$aHaake, U.$$b2
000009424 7001_ $$0P:(DE-HGF)0$$aChan, W.$$b3
000009424 7001_ $$0P:(DE-HGF)0$$aLafont, U.$$b4
000009424 7001_ $$0P:(DE-HGF)0$$aKelder, E.M.$$b5
000009424 7001_ $$0P:(DE-HGF)0$$avan Eck, E.R.H.$$b6
000009424 7001_ $$0P:(DE-HGF)0$$aKentgens, A.P.M.$$b7
000009424 7001_ $$0P:(DE-HGF)0$$aMulder, F.M.$$b8
000009424 7001_ $$0P:(DE-HGF)0$$aWagemaker, M.$$b9
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000009424 9131_ $$0G:(DE-Juel1)FUEK415$$bStruktur der Materie$$kP55$$lGroßgeräteforschung mit Photonen, Neutronen und Ionen$$vGroßgeräte für die Forschung mit Photonen, Neutronen und Ionen (PNI)$$x1
000009424 9132_ $$0G:(DE-HGF)POF3-623$$1G:(DE-HGF)POF3-620$$2G:(DE-HGF)POF3-600$$aDE-HGF$$bForschungsbereich Materie$$lIn-house research on the structure, dynamics and function of matter$$vNeutrons for Research on Condensed Matter$$x0
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