| 1. |
- Saadoune, Ismael, et al.
(author)
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Electrode Materials Based On Phosphates For Lithium Ion Batteries As An Efficient Energy Storage System
- 2015
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In: Proceedings of the TMS Middle East - Mediterranean Materials Congress on Energy and Infrastructure Systems (MEMA 2015). - Hoboken, NJ, USA : WILEY-BLACKWELL. - 9781119090427 - 9781119065272 ; , s. 343-349
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Conference paper (peer-reviewed)abstract
- Co0.5TiOPO4 and LiFe0.4Mn0.6PO4 phosphates present the electrochemical features of anode and cathode of lithium ion batteries, respectively. The cobalt oxyphosphate exhibits a high capacity and a working potential around 1.5 V. During the first discharge, an irreversible lithiation reaction occurs while during the subsequent cycles, a good reversibility of the charge/discharge process was obtained with a stable specific capacity approaching 280 mAh/g even at high rate. For the LiFe0.4Mn0.6PO4 olivine, the electrochemical process occurs in two steps involving separately two redox couples: Mn3+/Mn2+ and Fe3+/Fe2+. The electrochemical lithiation/delithiation occur without significant changes in the structure. Even if the obtained capacity ( 110 mAh/g), is lower that the theoretical one, the coulombic storage efficiency is rather good ( 95%).
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| 2. |
- El-Bealy, M. O.
(author)
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Analysis of thermo-mechanical rigidity of continuously cast steel slabs
- 2015
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In: Proceedings of the TMS Middle East - Mediterranean Materials Congress on Energy and Infrastructure Systems, MEMA 2015. - Hoboken, NJ, USA : John Wiley & Sons. - 9781119065272 ; , s. 501-510
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Conference paper (peer-reviewed)abstract
- A new design of air-water mist nozzle "AWM" has been developed to improve the thermo-mechanical rigidity of continuously cast steel slabs. This is by maximization of solid shell resistance against thermo-metallurgical and mechanical stresses. The idea behind this design is optimizing the homogeneity degree of cooling pattern between a pair of rolls. The design description of air-water mist nozzle and the effect of nozzle characteristics on its function have been explained. The mathematical model of thermal, solidification, solid shell resistance and cooling conditions has been developed. Also, the model can be computed the new concept to examine the micro-quality defined as micro thermo-mechanical rigidity "Mic-TMR". The results indicate that the homogeneity degree of cooling conditions is proportional to the increase in Mic-TMR criterion and therefore improve the inner quality of slabs. Model predications of new design of air-water mist nozzle is compared and discussed with other water and traditional designs of AWM nozzles.
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