The invention relates to a Cl-doped epsilon LiVOPO4
lithium fast ion conductor and a
liquid phase preparation method, and the Cl-doped epsilon LiVOPO4
lithium fast ion conductor is characterized in that the stoichiometric formula is LiVO (PO4)1-xCl3x, and x is equal to 0.05-0.10; through Cl-
doping, the acting force for conducting
lithium ions and a
crystal framework is reduced, the conduction
activation energy of the lithium ions is greatly reduced, and the activity capability and the
conductivity of the lithium ions are improved; in addition, through two calcining processes, the reaction rawmaterials are more uniform, and the purity of the obtained material is higher; the concentration of
oxygen vacancies and defects in the material is increased through rapid room-temperature cooling, and conduction of the lithium ions is facilitated; through liquid-
phase synthesis, a multi-component auxiliary agent is adopted, so that the uniformity degree of each component of reactants is improved,and a high-purity product can be obtained; and due to the measures, the normal-temperature lithium
ion conductivity of the lithium
fast ion conductor exceeds 5 * 10 < -4 > S / cm, and the application of the lithium fast
ion conductor is facilitated.