Journal
JOURNAL OF POWER SOURCES
Volume 246, Issue -, Pages 103-109Publisher
ELSEVIER
DOI: 10.1016/j.jpowsour.2013.07.073
Keywords
Titanium dioxide; TiO2 (B); Li-insertion; Cyclic voltammetry; Capacitive charging
Funding
- Grant Agency of the Czech Republic [13-07724S, P108/12/0814]
- Czech Ministry of Education Youth and Sports [CM1104, LD13060]
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Analysis of cyclic voltammograms of Li insertion into TiO2 (B) and anatase provides information about capacitive contributions to overall charge of Li-storage. The enhancement of 30% is found in capacitive contributions (normalized to the total stored charges) in TiO2 (B) compared to that in anatase, in spite of ca. three times smaller surface area of the former. Different charging mechanism explains facilitated Li+ insertion in TiO2 (B). The difference is caused mainly by pseudocapacitive Li-storage in the bulk TiO2 (B). Deconvolution of cyclic voltammograms also indicates different capacitive contributions of the two voltammetric peaks, S1 and S2 of TiO2 (B). These results provide novel insight into the Li-storage in TiO2 (B) and its difference from that in anatase. (C) 2013 Elsevier B.V. All rights reserved.
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