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On the origin of the extra capacity at low potential in materials for Li batteries reacting through conversion reaction

Ponrouch, Alexandre and Taberna, Pierre-Louis and Simon, Patrice and Palacín, Maria Rosa On the origin of the extra capacity at low potential in materials for Li batteries reacting through conversion reaction. (2012) Electrochimica Acta, 61. 13-18. ISSN 0013-4686

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Official URL: http://dx.doi.org/10.1016/j.electacta.2011.11.029

Abstract

The possibility of interfacial storage at low potential for electrode materials reacting through conversion reactions was evaluated. The amount of charge that could be stored through the proposed interfacial mechanism was estimated for a range of different materials and found to be much lower than those observed experimentally. Moreover, the slope of the potential decay and the influence of the current in the extent of stored capacity for experiments carried out in composite electrodes containing Co3O4 are not consistent with a capacitive-like mechanism. In summary, no evidence for capacitive storage could be found, our results being in agreement with the process taking place at low potential being solely related to electrolyte decomposition.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com/science/article/pii/S0013468611017002
HAL Id:hal-00906382
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Other partners > Universitat Autònoma de Barcelona - UAB (SPAIN)
Other partners > Advanced Lithium Energy Storage Systems - ALISTORE (FRANCE)
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Deposited By: cirimat webmestre
Deposited On:19 Nov 2013 14:53

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