1. University of Cambridge, University Chemical Laboratory, Lensfield Road, Cambridge, CB2 1EW, U.K.
2. Gonville and Caius College, Trinity
Street, Cambridge, CB2
1TA, U.K.
3. Institut
Charles Gerhardt Montpellier-UMR 5253 CNRS, ALISTORE European Research Institute (3104 CNRS), Université Montpellier 2, 34095, Montpellier, France
4. Réseau sur le Stockage Electrochimique de l’Energie (RS2E), FR CNRS 3459, 80039 Amiens Cedex, France
5. X-ray
Science Division, Advanced Photon Source, Argonne National Laboratory, Lemont, Illinois 60439, United States
6. Theory of
Condensed Matter Group, Cavendish Laboratory, University of Cambridge, J. J. Thomson Avenue, Cambridge CB3 0HE, U.K.