- Tytuł:
- Improvement of Cycling Stability of $LiMn_2O_4$ Cathode by $Al_2O_3$ Surface Coating for Li-Ion Batteries
- Autorzy:
-
Şahan, H.
Göktepe, H.
Kılıç Dokan, F.
Aydın, A.
Veziroğlu, S.
Patat, Ş. - Powiązania:
- https://bibliotekanauki.pl/articles/1399895.pdf
- Data publikacji:
- 2013-02
- Wydawca:
- Polska Akademia Nauk. Instytut Fizyki PAN
- Tematy:
- 88.80.ff
- Opis:
- The effect of the $Al_2O_3$ coating on the charge-discharge cycling performance of spinel powder ($LiMn_2O_4$) was investigated in the range of 3.5-4.5 V at 1C. The $Al_2O_3$ coating on the surface of the spinel powder was carried out using the solution method, followed by 500C for 6 h in air. Powder X-ray diffraction pattern of the $Al_2O_3$-coated spinel $LiMn_2O_4$ showed that the $Al_2O_3$ coating medium was not incorporated in the spinel bulk structure. Scanning electron microscopy results showed that the $Al_2O_3$ coating particles were homogeneously distributed on the surface of $LiMn_2O_4$ powder particles. The $Al_2O_3$-coated $LiMn_2O_4$ retained 92.3% of its original capacity after 30 cycles, showing much better cycle ability than the bare lithium manganese oxide. The improvement of electrochemical performance is attributed to suppression of $Mn^{2+}$ dissolution into electrolyte via $Al_2O_3$ layer.
- Źródło:
-
Acta Physica Polonica A; 2013, 123, 2; 368-370
0587-4246
1898-794X - Pojawia się w:
- Acta Physica Polonica A
- Dostawca treści:
- Biblioteka Nauki
Artykuł