A kind of lithium ion battery flexible electrode and preparation method thereof
A lithium-ion battery and flexible electrode technology, which is applied in the field of preparation of flexible lithium-ion batteries, can solve the problems of thin-film battery electrochemical performance degradation, electrochemical performance degradation, and difficult substrate close contact, etc., to achieve novel preparation methods, avoid pollution, good flexibility effect
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[0042] Such as figure 1 Shown, a kind of preparation method of lithium ion battery flexible electrode comprises the steps:
[0043] S100: Disperse the flexible substrate a and the surfactant a first, then pour them into a device with a filter membrane for suction filtration, so as to form a first layer of membrane on the filter membrane;
[0044] Typically, the flexible substrate a is one or both of carbon nanotubes, graphene, and graphene oxide;
[0045] Described surfactant a is the one in sodium lauryl sulfate, sodium dodecylbenzenesulfonate, sodium octadecyl sulfate or sodium stearate;
[0046] The filter membrane is one of PTFE filter membrane, PVDF filter membrane, nylon filter membrane and PP filter membrane;
[0047] Dispersing the flexible base a and the surfactant a includes:
[0048] S110, fully mixing the flexible substrate a and the surfactant a in a container filled with deionized water to obtain a mixed solution a, the concentration of the flexible substrate ...
Embodiment 1
[0068] Take 20 mg of carbon nanotubes in a beaker filled with 50 mL of deionized water, add 0.05 g of sodium lauryl sulfate to it, and disperse for 30 min with an ultrasonic cell pulverizer. After the dispersion is completed, pour the solution into a beaker covered with a PTFE filter membrane. Suction filtration is carried out in the sand core funnel, and after the suction filtration is completed, rinse with deionized water three times, and the first layer of film is formed on the filter membrane;
[0069] Take 60 mg of carbon nanotubes in a beaker with 100 mL of deionized water, add 0.25 g of sodium lauryl sulfate to it, and disperse it with an ultrasonic cell pulverizer for 30 minutes, then add 60 mg of lignin and 20 mg of lithium iron phosphate into the beaker, Continue to ultrasonically disperse for 1 hour. After the dispersion is completed, pour the solution into the sand core funnel with the first layer of membrane covered, and perform suction filtration. After the suctio...
example 2
[0073] Take 30 mg of graphene in a beaker with 100 mL of deionized water, add 0.065 g of sodium octadecyl sulfate to it, and disperse it with an ultrasonic cell pulverizer for 45 minutes. After the dispersion is completed, pour the solution into a sand covered with a PVDF filter membrane. Carry out suction filtration in the core funnel, after the suction filtration is completed, rinse with deionized water three times, and the first layer of film is formed on the filter membrane;
[0074] Take 80mg of graphene in a beaker with 100mL of deionized water, add 0.25g of sodium octadecyl sulfate to it, disperse it with an ultrasonic cell pulverizer for 45min, then add 60mg of cellulose and 20mg of ternary positive electrode powder to the beaker (NCM523), continue ultrasonic dispersion for 1h. After the dispersion is completed, pour the solution into the sand core funnel with the first layer of flexible substrate, and perform suction filtration. After the suction filtration is complet...
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