Study On Interfacial Properties Of Organic Electrolyte To Fluoride Carbon Electrode

The main works of this paper were listed as follow:1．Briefly introduction of the lithium primary battery, the advantages anddisadvantages of the Li/CFxbattery, the classification and selection rules of theorganic electrolytes, and the development and progress of the CFxpreparation.2．C5H11PF2O3is synthesized and applied in the electrolytes for the Li/CFxbattery.3. The electrochemical performances of the electrode using electrolytes withdifferent salts and solvents are intensively investigated at room temperature. TheLiBF4based electrolyte indicates the excellent electrochemical stability and good lowand high temperature performances. And the C5H11PF2O3is intrinsically highKinematic viscosity, which leads to poor rate performances. That inhibits it as the solesolvent for the electrolyte. PC: DME=1:1had better compatibility with CFxelectrodes.4．With the results above, electrochemical proformances at55℃werediscussed. The electrolytes was mixed with the C5H11PF2O3, PC and DME as thesolvent, and the LiBF4as the salt. As a result, higher discharge plateau was obtainedand the rate capability was improved without compromissing the capacity of CFxelectrode.5．The structure and electrochemical properties of spherical CFxwith differentfluoride contents were studied by the analysis method of SEM, FT-IR and XRD. Thefactors of electrochemical performance originated from fluoride content wereinvestigated. Particle size, interlayer spacing and>CF2surface groups greatly affectedthe electrochemical properties of CFxelectrodes.