2016-Sustainable Industrial Processing Summit
SIPS 2016 Volume 11: Physics, Advanced/Multifunctional Materials, Composite, Quasi-crystals, Coating
| Editors: | Kongoli F, Marquis F, Lu L, Xia H, Masset P, Rokicki P |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2016 |
| Pages: | 180 pages |
| ISBN: | 978-1-987820-56-0 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Preparations and modifications of niobium-based anode materials for lithium-ion batteries
Chunfu Lin1;1HAINAN UNIVERSITY, Haikou, China;
Type of Paper: Regular
Id Paper: 324
Topic: 21
Abstract:
The great success that lithium-ion batteries (LIBs) have experienced in portable electronic devices is now being extended to electric vehicles (EVs), which require both high power density and high energy density. Despite the large theoretical capacity of 372 mAh g每1, the commonly used graphite anode material suffers from its poor rate performance and safety. Among the recently developed anode materials, Li4Ti5O12 probably has received the most attention. Although Li4Ti5O12 can be modified to be a superior anode material with high rate performance, good cyclability and high safety, its main problem of the intrinsically small theoretical capacity (175 mAh g每1) cannot be solved. Due to the Nb5+/Nb3+ redox couple, niobium-based oxides have large theoretical capacities, which are comparable with that of graphite. However, some of these oxides suffer from the low (electronic and ionic) conductivities. In this study, a few niobium-based oxides are fabricated; then some of them are modified through crystal-structure modification, compositing, nanosizing and their combined methods. Consequently, several niobium-based oxides, with the same advantages of Li4Ti5O12 but much larger capacities, can fulfil the requirements of both high power density and high energy density, thus may find its promising applications in the LIBs of EVs.