2015-Sustainable Industrial Processing Summit
SIPS 2015 Volume 10: Mineral & Secondary Battery
| Editors: | Kongoli F, Silva AC, Arol AI, Kumar V, Aifantis K |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2015 |
| Pages: | 340 pages |
| ISBN: | 978-1-987820-33-1 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Potential Anode Alternatives for Rechargeable Lithium-ion batteries
Kai Xi1; Vasant Kumar1;1UNIVERSITY OF CAMBRIDGE, Cambridge, United Kingdom (Great Britain);
Type of Paper: Regular
Id Paper: 564
Topic: 14
Abstract:
Transition metal oxides (TMOs), such as TiO2, NiO2, SnO2, and Co3O4, have been considered as the potential anode material substitutes for graphite in rechargeable lithium-ion batteries (LIBs), due to their high theoretical capacities, high volumetric energy densities and improved safety in comparison with conventional graphite. However, the practical applications of TMOs have been suffered from poor electronic conduction, large volume change followed by disintegration or pulverization during charging-discharging.
In our work, three main types of strategies have proved more effective to deal with these problems. One favourable method is based upon preparing nano-sized metal oxides with hollow, mesoporous and hierarchical structures, which can potentially buffer the large volume changes while simultaneously decreasing the diffusion length for lithium ions, leading to improvement in cycling capacity retention upon extended cycling. The other approach is to combine the metal oxides nanostructures with flexible conductive matrix such as carbon nanotubes (CNTs), CMK-3 and graphene which can also accommodate the mechanical strain during the lithiation/delithiation process while inhibiting agglomeration and enhancing conductivity. Another method is based upon using mixed transition metal oxides (MTMOs) as a suitable electrode material on account of their higher electrochemical activities and higher electrical conductivities than simple TMOs. These results indicate promising innovative designs for battery electrodes with improved electrochemical performance.