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- W130718831 abstract "The synthesis of nanostructured Mn /Co carbonates (Mn1-xCoxCO3, x = 0-0.5) was done with reverse micelle method. Two water-in-isooctane microemulsions, one containing Mn(NO3)2.4H2O and Co(NO3)2.6H2O and the other one containing NaHCO3 as aqueous phase and stabilized with CTAB (surfactant) and hexanol (co-surfactant) were mixed in order to obtain Mn1-xCoxCO3 nanostructured particles. The x-ray patterns of for all the samples were in agreement with a Calcite structure and the variation of unit cell parameters, a and c, with Co content was linear and in agreement with Vegard’s law. According to the TEM images, submicronic monodispersed regular shaped particles in the samples with x = 0, 0.1 and 0.2 per formula, submicronic monodispersed distorted particles for Mn0.7Co0.3CO3, a mixture of distorted particles and agglomerates for Mn0.6Co0.4CO3 and only agglomerates for Mn0.5Co0.5CO3 were observed. This was also confirmed by Williamson-Hall method calculations. -1 ) and a considerable irreversible capacity of 500 mAhg -1 that decreased significantly upon cycling. The capacity fading was significant for all the samples, while Mn0.7Co0.3CO3 and Mn0.6Co0.4CO3 showed the highest capacity retention. The potentiostatic discharge/charge cycles for all the samples showed a reduction peak in the range 0.5 to 0.0 V related to Mn 2+ and Co 2+ cation reduction. This peak shifted to lower voltages by increasing the voltage sweep rate and by decreasing the cobalt content. The main contribution to capacity at low discharge sweep rates and higher cobalt contents was faradic, while capacitive contribution became important in high rates of discharge and lower amounts of cobalt." @default.
- W130718831 created "2016-06-24" @default.
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- W130718831 date "2008-01-01" @default.
- W130718831 modified "2023-09-23" @default.
- W130718831 title "STRUCTURAL CHARACTERIZATION AND ELECTROCHEMICAL BEHAVIOR OF TRANSITION METAL CARBONATES." @default.
- W130718831 hasPublicationYear "2008" @default.
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