Electrochemical Performance of One-step Solvothermal Method to Prepare Cobalt Fluoride Composite Electrode
Cobalt fluoride has good Coulombic efficiency,theoretical specific capacity,cycling stability,and capacity retention ability,exhibiting good electrochemical performance,which has attracted the attention of researchers in the field of chemical energy storage.Using cobalt chloride hexahydrate as the cobalt source and ammonium fluoride as the fluorine source,a one-step solvothermal method was used to load cobalt fluoride crystal nanosheet arrays on the surface of activated carbon cloth.The microstructure and phase composition of cobalt fluoride were investigated using TEM,SEM,and XRD.The electrochemical cycling stability and specific capacitance of cobalt fluoride were obtained using an electrochemical workstation.The results show that the nanosheets are 10～30 nm thick and vertically grow on the surface of carbon cloth fibers in a staggered network distribution.At a current density of 1 mA/cm2,the specific capacitance of the composite electrode is 826.6 F/g.After 1000 cycles of charge and discharge,the specific capacity retention rate is 93.7%.This study provides a feasible solution for the short path synthesis of fluoride based composite materials.The array growth of fluoride crystals on the surface of carbon cloth and the construction of fully electrochemically active binder free composite electrodes provide a new research approach for optimizing the electrochemical performance of fluoride.
theoretical specific capacitysolvothermal methodcarbon fibernano-chip filmcobalt fluoride
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