Black anatase titania enabling ultra high cycling rates for rechargeable lithium batteries

Title
Black anatase titania enabling ultra high cycling rates for rechargeable lithium batteries
Author
선양국
Keywords
Anatase titania; Band gap energy; Charge-discharge cycle; Discharge capacities; High electrical conductivity; Host structure; Nano-structured; Rechargeable lithium battery
Issue Date
2013-09
Publisher
Royal Society of Chemistry
Citation
Energy & environmental science, 2013, 6(9), p.2609-2614
Abstract
In this work we report the synthesis and the characterization of black anatase TiO2. We show that this material displays a nanostructured architecture, with an electro-conducting trivalent Ti. The presence of trivalent Ti in this structure narrows the inherent high band gap energy to a semiconductor level, reaching a value as low as 1.8 eV, resulting in the very high electrical conductivity of 8 × 10?2 S cm?1. These extraordinary electro-conducting physical properties ensure an ultra fast Li+ insertion into and extraction from the host structure of anatase TiO2 making it a unique, high rate electrode, delivering at a 100 C-rate (20 A g?1) a discharge capacity of 127 mA h (g-TiO2)?1 with approximately 86% retention during 100 charge?discharge cycles at 25 °C and approximately 84% retention at ?20 °C.
URI
http://pubs.rsc.org/en/Content/ArticleLanding/2013/EE/c3ee41960f#!divAbstracthttp://hdl.handle.net/20.500.11754/50907
ISSN
1754-5692
DOI
10.1039/c3ee41960f
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
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