A kind of porphyrin compound and its preparation method and application in secondary battery cathode material
A porphyrin compound, secondary battery technology, applied in secondary batteries, battery electrodes, electrolyte battery manufacturing and other directions, can solve the problems of high solubility and low electronic conductivity restricting development, and achieve excellent discharge specific energy, high discharge The effect of specific capacity and ultra-long cycle life
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Embodiment 1
[0041] The preparation process of porphyrin compound is as follows:
[0042]
[0043] (1) chemical structural formula is the synthesis of the intermediate of a:
[0044] 500 mL of pyrrole was degassed with argon for 15 minutes, then 15 mL (112 mmol) of thiophene-2-carbaldehyde was added under argon atmosphere. After cooling the mixture to 0 °C, 1 mL of CF was added 3 COOH The ice bath was then removed and the reaction was stirred for 30 minutes. After the reaction was completed, unreacted pyrrole was removed by distillation under reduced pressure. The residue was purified by column chromatography (silica gel powder, petroleum ether:dichloromethane (DCM)=3:1) to obtain a pale yellow solid a (12.47 g, yield 49%).
[0045] (2) chemical structural formula is the synthesis of the intermediate of b:
[0046] Compound a (5.7 g, 25 mmol) and 3-trimethylsilylpropional (3.175 g, 25 mmol) were added to 1.2 L of dichloromethane (DCM), and the mixture was heated at 0° C. outgassing. ...
Embodiment 2
[0052] The porphyrin compound prepared in embodiment 1 is used as the positive electrode active material of lithium ion battery, specifically as follows:
[0053] The porphyrin compound that is 7 parts by weight and the conductive agent acetylene black of 2 parts, the binding agent polyvinylidene fluoride of 1 part are dissolved in N-methylpyrrolidone (10mg / ml), fully grind, will grind uniform The slurry is coated on a stainless steel sheet, and the solvent is dried in a vacuum drying oven at 80°C to be used as the positive electrode of the battery, the metal lithium sheet is used as the negative electrode, and the electrolyte is 1mol / L LiPF 6 , the solvent molecule is PC / EC / DMC (v / v / v=1:1:3), assembled into a button battery under an argon atmosphere, and electrochemically performed in the range of 4.5-1.0V with a constant current charge and discharge instrument Performance Testing.
Embodiment 3
[0055] The CuDETP prepared in Example 1 is used as the positive electrode active material of lithium ion battery, specifically as follows:
[0056] 10 parts by weight of porphyrin compound and 8 parts of conductive agent acetylene black, 2 parts of binder polyvinylidene fluoride are dissolved in N-methylpyrrolidone (10mg / ml), fully ground, the ground uniform The slurry is coated on a stainless steel sheet, and the solvent is dried in a vacuum drying oven at 80°C to be used as the positive electrode of the battery, the metal lithium sheet is used as the negative electrode, and the electrolyte is 1mol / L LiPF 6 , whose solvent molecule is PC, assembled into a button battery under an argon atmosphere, and tested its electrochemical performance with a constant current charge and discharge instrument in the range of 4.5-1.8V and a current density of 1.0A / g.
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