Lithium storage mechanisms and effect of partial cobalt substitution in manganese carbonate electrodes |
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Authors: | Mirhashemihaghighi Shadi León Bernardo Pérez Vicente Carlos Tirado José L Stoyanova Radostina Yoncheva Meglena Zhecheva Ekaterina Sáez Puche Regino Arroyo Elena M Romero de Paz Julio |
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Affiliation: | Inorganic Chemistry Laboratory, Universidad de Córdoba, Edif. C3, Campus de Rabanales, 14071 Córdoba, Spain. |
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Abstract: | A promising group of inorganic salts recently emerged for the negative electrode of advanced lithium-ion batteries. Manganese carbonate combines low weight and significant lithium storage properties. Electron paramagnetic resonance (EPR) and magnetic measurements are used to study the environment of manganese ions during cycling in lithium test cells. To observe reversible lithium storage into manganese carbonate, preparation by a reverse micelles method is used. The resulting nanostructuration favors a capacitive lithium storage mechanism in manganese carbonate with good rate performance. Partial substitution of cobalt by manganese improves cycling efficiency at high rates. |
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