2022-Sustainable Industrial Processing Summit
SIPS2022 Volume 14 Yazami Intl. Symp Secondary Battery Manufacturing & Recycling and Electrochemistry
| Editors: | F. Kongoli, K. Aifantis, C. Capiglia, A. Fox, V. Kumar, A. Tressaud, Z. Bakenov, A. Qurashi. |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2022 |
| Pages: | 158 pages |
| ISBN: | 978-1-989820-60-5(CD) |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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SIZE EFFECTS ON TRANSPORT, THERMODYNAMICS AND ENERGY STORAGE
Balaya Palani1;1NATIONAL UNIVERSITY OF SINGAPORE, Singapore, Singapore;
Type of Paper: Regular
Id Paper: 464
Topic: 14
Abstract:
Nanostructured materials have triggered a great excitement in the area of energy sector due to both fundamental interest and technological impact. [1,2] Size reduction in nanocrystals leads to a variety of unexpected exciting phenomena due to enhanced surface-to-volume ratio and reduced length for the transport of ions and electrons. We will consider some of those anomalous phenomena restricting our discussions to the nano-size effects on (a) transport, (b) thermodynamics and (c) storage behaviour with a few examples to illustrate material challenges for advanced energy storage devices.
(a) Mesoscopic electrical conduction occurs due to overlap of space charges at reduced interfacial spacings. Unlike microcrystalline SrTiO3, having both bulk as well as semi-infinite interfacial contributions to the electrical conduction, nanocrystalline SrTiO3 exhibits only interfacial conduction. [3]
(b) Size reduction of materials affects thermodynamic properties and hence their energetics due to excess surface contributions causing stabilization of meta-stable phases at nano-size. [4] Increase in cell voltage due to nanosizing or amorphization will be highlighted. [5]
(c) In the context of storage behaviour, nanocrystalline materials exhibit high capacity as well as high coulombic efficiency (reversible storage). We will consider a few case studies on lithium storage. [6-8]
Keywords:
Anodes; Cathodes; Electrical; Electrochemical; Energy; Interface; Li-Ion; Nanomaterials; Phosphate; thermodynamics; surface energy;References:
[1] J. Maier, Nature Mater., 4, 2005, 805-815.[2] P. Balaya, Energy Environ. Sci., 1, 2008, 645-654.
[3] P. Balaya, J. Jamnik J. Fleig and J. Maier, App. Phys. Lett., 88, 2006, 062109.
[4] P. Balaya and J. Maier, Phys. Chem. Chem. Phys., 12, 2010, 215-219
[5] O. Delmer, P. Balaya, L. Kienle and J. Maier, Adv. Mater. 20, 2008, 501-505
[6] K. Saravanan, P. Balaya, M.V. Reddy, B.V.R. Chowdari and J.J. Vittal, Energy Environ. Sci., 3, 2010, 457-463
[7] H.S. Lee, R. Vishwanathan, K. Saravanan, N. Mangayarkarasi, M. Law, C. Wang, A. Tripathi and P. Balaya, Electrochim. Acta, 372, 2021, 137831
[8] K. Saravanan, K. Ananthanarayan and P. Balaya, Energy Environ. Sci., 3, 2010, 939-948