TY - JOUR
T1 - Materials for aqueous sodium-ion batteries
T2 - Cation mobility in a zinc hexacyanoferrate electrode
AU - Oliver-Tolentino, Miguel A.
AU - Vazquez-Samperio, Juvencio
AU - Cabrera-Sierra, Roman
AU - Reguera, Edilso
N1 - Publisher Copyright:
© 2016 The Royal Society of Chemistry.
PY - 2016
Y1 - 2016
N2 - The coordination polymer Zn3Na2[FeII(CN)6]2 has an open porous framework that is stable in acidic and neutral aqueous solutions and appears to be an attractive solid for investigation as a material for sodium ion-based batteries. The easy ion exchange of Na+ by bigger cations (such as K+, Rb+ and Cs+) and the existence of the oxidized species Zn3[FeIII(CN)6]2 (as a stable phase) support the present study of the redox reaction and stability in aqueous media under electrochemical conditions for all the series, including the effect of the accompanying cation on the mobility of sodium in the framework. When a study was carried out in a solution of sodium ions, in the material structure K+ and Rb+ were progressively displaced by the sodium ions, which was ascribed to their higher mobility. However, when an experiment was conducted using a solution containing Cs+ or in an aqueous solution of NaNO3, from Zn3Cs2[FeII(CN)6]2, the mixed composition Zn3NaCs[FeII(CN)6]2 was formed. The results discussed here are supported by the electrochemical and spectroscopic measurements. Galvanostatic experiments on the Zn3Cs2[FeII(CN)6]2 system in a solution of sodium ions revealed a capacity retention of 75% during 40 charge/discharge cycles.
AB - The coordination polymer Zn3Na2[FeII(CN)6]2 has an open porous framework that is stable in acidic and neutral aqueous solutions and appears to be an attractive solid for investigation as a material for sodium ion-based batteries. The easy ion exchange of Na+ by bigger cations (such as K+, Rb+ and Cs+) and the existence of the oxidized species Zn3[FeIII(CN)6]2 (as a stable phase) support the present study of the redox reaction and stability in aqueous media under electrochemical conditions for all the series, including the effect of the accompanying cation on the mobility of sodium in the framework. When a study was carried out in a solution of sodium ions, in the material structure K+ and Rb+ were progressively displaced by the sodium ions, which was ascribed to their higher mobility. However, when an experiment was conducted using a solution containing Cs+ or in an aqueous solution of NaNO3, from Zn3Cs2[FeII(CN)6]2, the mixed composition Zn3NaCs[FeII(CN)6]2 was formed. The results discussed here are supported by the electrochemical and spectroscopic measurements. Galvanostatic experiments on the Zn3Cs2[FeII(CN)6]2 system in a solution of sodium ions revealed a capacity retention of 75% during 40 charge/discharge cycles.
UR - http://www.scopus.com/inward/record.url?scp=84997172261&partnerID=8YFLogxK
U2 - 10.1039/c6ra23261b
DO - 10.1039/c6ra23261b
M3 - Artículo
SN - 2046-2069
VL - 6
SP - 108627
EP - 108634
JO - RSC Advances
JF - RSC Advances
IS - 110
ER -