The behavior of a NaFePO4 cathode, obtained by electrochemical Li-Na exchange of LiFePO4 olivine, is characterized in a sodium battery. The NaFePO4 electrode here developed shows remarkable electrochemical properties in the sodium cell, such as long charge-discharge cycle life and high rate capability. X-ray diffraction analysis reveals that the NaFePO4 electrode keeps its original structure upon 50 charge-discharge cycles. The Na/NaFePO4 battery operates with a working voltage of 2.7 V and a stable capacity of 125 mAh g(-1) namely at 80% of the theoretical value. The results here reported demonstrate that the olivine NaFePO4 electrode is indeed a very promising positive electrode for the development of high performance, advanced sodium batteries. (C) 2012 Elsevier B.V. All rights reserved.
Reversible NaFePO4 electrode for sodium secondary batteries / Seung Min, Oh; Seung Taek, Myung; Hassoun, Jusef; Scrosati, Bruno; Yang Kook, Sun. - In: ELECTROCHEMISTRY COMMUNICATIONS. - ISSN 1388-2481. - 22:(2012), pp. 149-152. [10.1016/j.elecom.2012.06.014]
Reversible NaFePO4 electrode for sodium secondary batteries
HASSOUN, JUSEF;SCROSATI, Bruno;
2012
Abstract
The behavior of a NaFePO4 cathode, obtained by electrochemical Li-Na exchange of LiFePO4 olivine, is characterized in a sodium battery. The NaFePO4 electrode here developed shows remarkable electrochemical properties in the sodium cell, such as long charge-discharge cycle life and high rate capability. X-ray diffraction analysis reveals that the NaFePO4 electrode keeps its original structure upon 50 charge-discharge cycles. The Na/NaFePO4 battery operates with a working voltage of 2.7 V and a stable capacity of 125 mAh g(-1) namely at 80% of the theoretical value. The results here reported demonstrate that the olivine NaFePO4 electrode is indeed a very promising positive electrode for the development of high performance, advanced sodium batteries. (C) 2012 Elsevier B.V. All rights reserved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
