Capacitive contribution to Li-storage in TiO2 (B) and TiO2 (anatase)

被引：92
作者：
Laskova, Barbora [1 ,2 ]
Zukalova, Marketa [1 ]
Zukal, Arnost [1 ]
Bousa, Milan [1 ,2 ]
Kavan, Ladislav [1 ,2 ]
机构：
[1] Acad Sci Czech Republ, J Heyrovsky Inst Phys Chem, Vvi, CZ-18223 Prague 8, Czech Republic
[2] Charles Univ Prague, Fac Sci, Dept Inorgan Chem, CZ-12843 Prague 2, Czech Republic
来源：
JOURNAL OF POWER SOURCES | 2014年 / 246卷
关键词：
Titanium dioxide; TiO2 (B); Li-insertion; Cyclic voltammetry; Capacitive charging; LITHIUM-ION STORAGE; TITANIUM-DIOXIDE; NANOSTRUCTURED TIO2; NEGATIVE ELECTRODE; INSERTION; ELECTROCHEMISTRY; PERFORMANCE; NANOWIRES; SURFACE; NANOPARTICLES;
D O I：
10.1016/j.jpowsour.2013.07.073
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
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.
引用
收藏
页码：103 / 109
页数：7
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