Transition metal oxides have recently aroused a renewed and increasing interest as conversion anode materials for sodium ion batteries. Being their electrochemical performances strongly dependent on morphological aspects, has been here proposed a straightforward approach to modulate morphological characteristics of a transition metal oxide (Co3O4) using a low cost synthetic route. The as obtained optimized morphology allows the realization of high practical specific capacities, higher than 500 mAh g−1 after 50 cycles, and represents a valid candidate for further optimization. In addition to the morphology-performance correlations, the reaction mechanism beyond the electrochemical behavior was also investigated revealing the role of the CoO phase in the charge/discharge process. Finally, an electrode pre-sodiation treatment for conversion materials is presented: it has been indeed demonstrated that it sensibly decreases the irreversible capacity correlated to the first cycle and improves cycle ability.

Longoni, G., Fiore, M., Kim, J., Jung, Y., Kim, D., Mari, C., et al. (2016). Co3O4 negative electrode material for rechargeable sodium ion batteries: An investigation of conversion reaction mechanism and morphology-performances correlations. JOURNAL OF POWER SOURCES, 332, 42-50 [10.1016/j.jpowsour.2016.09.094].

Co3O4 negative electrode material for rechargeable sodium ion batteries: An investigation of conversion reaction mechanism and morphology-performances correlations

LONGONI, GIANLUCA
Primo
;
MARI, CLAUDIO MARIA
Penultimo
;
RUFFO, RICCARDO
2016

Abstract

Transition metal oxides have recently aroused a renewed and increasing interest as conversion anode materials for sodium ion batteries. Being their electrochemical performances strongly dependent on morphological aspects, has been here proposed a straightforward approach to modulate morphological characteristics of a transition metal oxide (Co3O4) using a low cost synthetic route. The as obtained optimized morphology allows the realization of high practical specific capacities, higher than 500 mAh g−1 after 50 cycles, and represents a valid candidate for further optimization. In addition to the morphology-performance correlations, the reaction mechanism beyond the electrochemical behavior was also investigated revealing the role of the CoO phase in the charge/discharge process. Finally, an electrode pre-sodiation treatment for conversion materials is presented: it has been indeed demonstrated that it sensibly decreases the irreversible capacity correlated to the first cycle and improves cycle ability.
Articolo in rivista - Articolo scientifico
Cobalt oxide; Electrode materials; Sodium ion batteries;
Cobalt oxide; Electrode materials; Sodium ion batteries; Renewable Energy, Sustainability and the Environment; Energy Engineering and Power Technology; Physical and Theoretical Chemistry; Electrical and Electronic Engineering
English
2016
332
42
50
partially_open
Longoni, G., Fiore, M., Kim, J., Jung, Y., Kim, D., Mari, C., et al. (2016). Co3O4 negative electrode material for rechargeable sodium ion batteries: An investigation of conversion reaction mechanism and morphology-performances correlations. JOURNAL OF POWER SOURCES, 332, 42-50 [10.1016/j.jpowsour.2016.09.094].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/133162
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