Metal Oxide/Polyprrole/Composite Fabric Electrode Materials And Performance Research Via Hard Template

Fiber fabric has the characteristics of low price,good hydrophilicity,soft texture,tensile strength and large specific surface area.These features make it an ideal substrate for flexible electrode materials.Conductive polymers have good electrochemical properties and biocompatibility as well as easy preparation,which leads to it's population in the supercapacitor field as the active substance.Metal oxide/PPy combinations are rarely used in the electrode materials of flexible supercapacitors.so,in this thesis,Metal oxide/Polypyrrole silk composite fabric flexible electrode material was prepared through Sol-gel method and in-situ oxidation polymerization using fabric as basement.The main research content is as follows:?1?Using silkworm fabric as substrate,ZnO was deposited on the surface of silk fabric by sol-gel method.Polypyrrole was loaded onto silk fabric by in-situ oxidation method,and ZnO/polypyrrole silk composite fabric electrode material was obtained.The composite electrode material has a capacity of 447 F/g under the current density of0.4A/cm².After 500 cycles of charge and discharge,The retention rate of relative initial specific capacity is about 53%.?2?Using the cotton fabric as substrate,the Fe₂O₃ was deposited on the surface of cotton fabric by Sol-gel method.Then,The composite electrode material of Fe2O3/polypyrrole cotton fabric was produced by In-situ oxidation polymerization.The composite electrode material has a capacity of 412 F/g under the current density of0.4A/cm².After 500 cycles of charge and discharge,The retention rate of relative initial specific capacity is kept at 38%,Under the same conditions,the specific capacity of Polypyrrole/cotton fabric electrode material is 333 F/g.After 500 cycles of charge and discharge,the specific capacity is maintained at 29%.which indicated that the addition of Fe2O3 is beneficial to the improvement of the initial specific capacity of the electrode materials,but The cycle stability needs to be improved.?3?Using silkworm fabric as substrate,TiO₂ was deposited on the surface of cotton fabric by sol-gel method.Polypyrrole was loaded onto cotton fabric by in-situ oxidation method,and composite electrode material of TiO₂/polypyrrole cotton fabric was obtained.The maximum electrical conductivity of the composite electrode material is6.3S/cm.under the condition of current density of 0.6A/cm²,the specific capacity is733F/g and the energy density is 44.4Wh/kg.After 500 charging and discharging cycles,the relative initial specific capacity is kept at 36%.Compared to the second chapter of cotton fabric as the base material,the initial specific capacity has been significantly improved,which indicated that the good crystal structure of TiO₂ can improve the Initial specific capacity of electrode materials.