Behaviour of AgBi(Cr2O7)2 as a possible cathode for lithium cells |
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| Authors: | J. Sarradin R. Messina J. Perichon M. Broussely |
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| Affiliation: | Laboratoire d''Electrochimie Organique, L.A. CNRS no 329, Université Paris Val de Marne, Avenue du Général de Gaulle, 94010 Créteil - Cédex France;SAFT/GIPELEC, 8, Rue Georges Leclanché, 86009 Poitiers France |
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| Abstract: | The electrochemical reduction of AgBi(Cr2O7)2 electrodes occurs in a nearly continuous way from 3.5 V to 2 V/Li+/Li and leads to a final oxidation state of about III for chromium ions. Three reduction steps can be distinguished:- CR(VI) reduction leading approximately to Cr(V)- Ag(I) reduction to Ag(O)- Further reduction of chromium, leading approximately to CR(III) in a quasi-reversible way.A loss of capacity was observed, however, during repeated charge/discharge cycles. |
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