Lithium Intercalation into Nanostructured Films Based on Oxides of Tin and Titanium

Кулова, Т. Л.; Скундин, А. М.; Roginskaya, Yu. E.; Chibirova, F. Kh.

doi:10.1023/b:ruel.0000023936.13222.6f

Cited by 10 publications

(31 citation statements)

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“…The electrodes with ST10 films were prepared and the cell prototypes were assembled as in [1]. The electrolyte was a 1 M lithium bistrifluoromethanesulfonimide solution in dioxolane.…”

Section: Methodsmentioning

confidence: 99%

“…At the end of the first cycle, along with β -tin, the ST10 films contained a considerable amount of disperse (to an extent of being x-ray-amorphous) stannic oxide; TiO 2 in this case underwent no reduction. As was assumed in [1], lithium is capable of entering both nanoparticles of metallic tin and an oxide phase, probably, nanoparticles of SnO 2 . Cyclic voltammetric curves of the first and second cycles for ST10 electrodes were presented in [1].…”

Section: Introductionmentioning

confidence: 99%

“…As was assumed in [1], lithium is capable of entering both nanoparticles of metallic tin and an oxide phase, probably, nanoparticles of SnO 2 . Cyclic voltammetric curves of the first and second cycles for ST10 electrodes were presented in [1]. A peak was noted in the cathodic curve for the first cycle at potentials of ~1 V relative to a lithium electrode.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…With the passage of time the range of objects into which insertion occurs considerably extended. The insertion of lithium into films of a nanostructured material containing 90% SnO 2 and 10% TiO 2 (material ST10) was studied for the first time in [1].This work is a study of reversible insertion of lithium into a complex composite containing both metallic and oxide phases.The ST10 films less than 1 µ m thick consist of globules with a characteristic size of 10-20 nm and a fine internal structure. The amount of lithium cathodically inserted into ST10 is equivalent to 400-700 mA h g -1 (calculated per weight of tin oxides); this reversible insertion capacity is severely dependent on the method used for depositing the ST10 films.…”

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confidence: 97%

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Nanostructured material based on Tin and Titanium Oxides: A potentiodynamic study

et al. 2005

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INTRODUCTIONThe phenomenon of cathodic insertion had been discovered in a collective of scientists headed by B.N. Kabanov. At that time research concentrated on the cathodic insertion of metals into metals with the formation of intermetallic compounds. With the passage of time the range of objects into which insertion occurs considerably extended. The insertion of lithium into films of a nanostructured material containing 90% SnO 2 and 10% TiO 2 (material ST10) was studied for the first time in [1].This work is a study of reversible insertion of lithium into a complex composite containing both metallic and oxide phases.The ST10 films less than 1 µ m thick consist of globules with a characteristic size of 10-20 nm and a fine internal structure. The amount of lithium cathodically inserted into ST10 is equivalent to 400-700 mA h g -1 (calculated per weight of tin oxides); this reversible insertion capacity is severely dependent on the method used for depositing the ST10 films. At the end of the first cycle, along with β -tin, the ST10 films contained a considerable amount of disperse (to an extent of being x-ray-amorphous) stannic oxide; TiO 2 in this case underwent no reduction. As was assumed in [1], lithium is capable of entering both nanoparticles of metallic tin and an oxide phase, probably, nanoparticles of SnO 2 . Cyclic voltammetric curves of the first and second cycles for ST10 electrodes were presented in [1]. A peak was noted in the cathodic curve for the first cycle at potentials of ~1 V relative to a lithium electrode. As in [2], the peak was ascribed to the reduction of a tin oxide.The electrochemical insertion of lithium into SnO, SnO 2 , and tin-containing amorphous oxide materials (tin composite oxides, TCO) was studied in [3,4]. It was shown that the tin state (large crystallites the average size of >100 nm, x-ray-amorphous clusters of tin or alloys Li x Sn) clearly tells on voltammetric curves. The narrow and intensive peaks indicate processes involving bulk crystallites formed during the reduction of tin oxides by lithium. The peaks' erosion points to the formation of nanoclusters and other disperse forms of tin. It was aggregation of various tin forms, which occurred during a prolonged cycling, that caused the capacity degradation [3,4]. Quantitative data on the crystallite growth in tin-containing electrode materials are not available.This work is an in-depth potentiodynamic study of lithium insertion into ST10 and its extraction out of ST10. It also traces structural changes that occur, in the first place, in β -tin during prolonged cycling. EXPERIMENTALThe electrodes with ST10 films were prepared and the cell prototypes were assembled as in [1]. The electrolyte was a 1 M lithium bistrifluoromethanesulfonimide solution in dioxolane. The water content in the electrolyte, measured after Karl Fischer (K.F. titration, KF 562 Metrohm) did not exceed 70 ppm. Potentiodynamic measurements were done with an EL-2 potentiostat designed and manufactured at the Frumkin Institute of Electrochemistry, Russia...

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“…The electrodes with ST10 films were prepared and the cell prototypes were assembled as in [1]. The electrolyte was a 1 M lithium bistrifluoromethanesulfonimide solution in dioxolane.…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 97%

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Nanostructured material based on Tin and Titanium Oxides: A potentiodynamic study

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Nanostructured material based on Tin and Titanium Oxides: A potentiodynamic study

2005

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Crystallite Size Dependence of Lithium Intercalation in Nanocrystalline Rutile

2009

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An electrochemical investigation has been undertaken into the dependence of particle size on the mechanism of lithium intercalation in rutile. A thoroughly characterized suite of rutile nanoparticles with diameters in the broad size range 4-50 nm was used in the study. Variation in the cyclic voltammetry of rutile over cycling is presented for the first time and numerous new electrode reactions identified. While a crystallite size effect was witnessed during fast voltammetry experiments, this effect disappeared as the rate was reduced and no variation in capacity was witnessed in galvanostatic cycling experiments. The intercalation potential was seen to increase with decreasing crystallite size, the opposite of what was predicted from quantum confinement. Enhanced lithium intercalation into the smaller nanoparticles has been ascribed to the slightly expanded structure of smaller nanocrystals relative to larger ones taking the dimensions of the tunnels into which Li inserts beyond a threshold value. This lattice expansion or volume dilation with decreasing crystallite size is due to the expected increase in surface tension with decreasing crystallite size. This would correspondingly increase the intercalation potential as the crystallite size decreased.

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Lithium Intercalation into Nanostructured Films Based on Oxides of Tin and Titanium

Cited by 10 publications

References 14 publications

Nanostructured material based on Tin and Titanium Oxides: A potentiodynamic study

Nanostructured material based on Tin and Titanium Oxides: A potentiodynamic study

Nanostructured material based on Tin and Titanium Oxides: A potentiodynamic study

Crystallite Size Dependence of Lithium Intercalation in Nanocrystalline Rutile

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