Accordion -like graphites prepared by exfoliation of a low temperature graphite fluoride were fluorinated using F-2 gas at various temperatures. The fluorinated exfoliated graphite exhibits unusual dual C-F bonding, i.e. weakened covalent and covalent. This bonding allows the discharge potential at the beginning of the electrochemical processes to be increased. Moreover, the accordion-like texture avoids partial exfoliation and loss of the electrical contact for some parts of the electrode, and allows the growth of LiF particles in the opened macro-porosity. (C)2016 Elsevier Ltd. All rights reserved.