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DOI: 10.1039/A905376J (Paper) Reference Section for: J. Mater. Chem., 1999, 9, 2809-2812

Crystal structure of the end product of electrochemical lithium intercalation in V2(SO4)3

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Gavin B. M. Vaughan, Joël Gaubicher, Thierry Le Mercier, Jacques Angenault, Michel Quarton and Yves Chabre

Abstract

The crystal structure of Li2V2(SO4)3 obtained by electrochemical intercalation of lithium into V2(SO4)3 has been solved using high resolution synchrotron X-ray powder diffraction. Surprisingly, in light of its ‘soft chemistry’ synthesis, the structure of Li2V2(SO4)3 is derived from that of the starting material via rearrangement of strong V–O bonds, leading to a mixed corner sharing/edge sharing arrangement among the VO6 octahedra and SO4 tetrahedra. Results of in situ electrochemical Li intercalation/synchrotron powder diffraction studies, carried out in working batteries and with a time resolution of the order of minutes, indicate that the rearrangement is reversible, at least during the first cycle.

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