| In recent years,organic materials have been widely used in the fields of ion batteries and supercapacitors due to their high theoretical specific capacity,flexible structure,good redox activity,safety and sustainability,in particular,the application of environmentally friendly and low-cost aqueous zinc-ion batteries(AZIBs)has become one of the research hotspots.However,at present,the solubility,conductivity and capacity performance of organic materials need to be further improved and enhanced.The development and design of new organic electrode materials and the study of their electrochemical properties are effective ways to solve the above problems.The organic quinone amine polymer material has a redox active group C=O and a nitrogen heteroatom,its structure is flexible,and it is an organic material with great development prospects.This topic focuses on organic quinone amine polymer materials,and the following work has been mainly carried out:(1)A novel organic quinone amine polymer material(TC-O)was synthesized by simple solution polymerization with tetrachlorobenzene quinone and o-phenylenediamine as raw materials,and the effect of temperature on its electrochemical properties was investigated.XPS and FT-IR tests show that the polymer material structure contains C-N and N-H to form a bond,and there is also a redox active group C=O.The CV test result shows good redox reversibility.The material is used as the positive electrode material of the aqueous zinc-ion battery.The electrochemical test results show that the TC-O-1material synthesized at 100°C has the best performance.At a current density of 0.1C and a voltage window of 0.3-1.3 V,the TC-O-1 electrode can provide an initial discharge capacity of 176.1 m Ah g-1.The capacity is 137.0 m Ah g-1 after 100 consecutive cycles,and the capacity remains the rate is 77.8%.(2)Another novel organic quinone amine polymer material(TC-M)was synthesized from tetrachlorobenzene quinone and melamine,and the effect of solvent concentration on its electrochemical performance was investigated.The material is used as the positive electrode material of the aqueous zinc-ion battery.The electrochemical test results show that the TC-M-1 material synthesized under the reaction solvent concentration of 0.11 g TCBQ/10 m L DMF has the best performance.At a current density of 0.1C and a voltage window of 0.3-1.6 V,the TC-M-1 electrode can provide 165.3 m Ah g-1.The capacity is78.0 m Ah g-1 after 100 consecutive cycles,and the capacity remains the rate is 47.2%.(3)The composite material TC-O/rGO(1:1,2:1,3:2)was prepared by in-situ polymerization and used as the cathode material of the aqueous zinc ion battery.Explore the effect of the addition of rGO on the electrochemical performance of composite materials.The electrochemical test results show that the performance of TC-O/rGO(1:1)is the best.At a rate of 0.2C,the TC-O/rGO(1:1)electrode provides a discharge specific capacity of 233.8 m Ah g-1.At a high rate of 2C,it still has a discharge specific capacity of165.5 m Ah g-1 after 500 cycles,and the capacity retention rate and coulombic efficiency reach 100%.It shows that the lamellar structure and good conductivity of rGO can significantly improve the cycle and rate performance of the polymer material TC-O. |
PDF Full Text Request