Lithium ion battery electrolyte with multistage structure and preparation method of lithium ion battery electrolyte
A lithium-ion battery, electrolyte technology, applied in secondary batteries, circuits, electrical components, etc., to achieve the effects of improved cycle stability and safety, simple process, and easy industrialization
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Embodiment 1
[0023] (1) the aramid fiber emulsion that concentration is 25wt% is dissolved in dimethylacetamide (the ratio of the two volumes is 1: 5) organic solvent, utilizes magnetic stirrer to stir 6 hours under normal temperature condition then to form the homogeneous mixing spinning solution.
[0024] (2) Slowly add the spinning solution configured in the above step (1) into the syringe, the inner diameter of the needle used is 0.3mm, and the extrusion rate of the needle solution is 0.2mL h -1 . A rotating cylinder covered with aluminum foil serves as a receiving device, and the receiving distance between the syringe tip and the collector is 11 cm. During the electrospinning process, the applied electrostatic voltage was 15KV. When the solvent evaporates, the aramid fiber membrane is obtained on the receiving device, and its fiber structure is as follows figure 1 shown.
[0025] (3) Place the aramid nanofiber membrane fiber membrane obtained in the above step (2) in a mixed solu...
Embodiment 2
[0027] (1) the aramid fiber emulsion that concentration is 25wt% is dissolved in dimethylacetamide (the ratio of the two volumes is 1: 5) organic solvent, utilizes magnetic stirrer to stir 6 hours under normal temperature condition then to form the homogeneous mixing solution, and on this basis, tetrabutylammonium hexafluorophosphate accounting for 1% of the mass fraction of the spinning solution was added and stirred at room temperature for 6 hours to form a uniform and stable spinning solution.
[0028] (2) Slowly add the spinning solution configured in the above step (1) into the syringe, the inner diameter of the needle used is 0.3mm, and the extrusion rate of the needle solution is 0.2mL h -1 . A rotating cylinder covered with aluminum foil serves as a receiving device, and the receiving distance between the syringe tip and the collector is 11 cm. During the electrospinning process, the applied electrostatic voltage was 15KV. After the solvent evaporates, the aramid pol...
Embodiment 3
[0031] (1) the aramid fiber emulsion that concentration is 25wt% is dissolved in dimethylacetamide (the ratio of the two volumes is 1: 5) organic solvent, utilizes magnetic stirrer to stir 6 hours under normal temperature condition then to form the homogeneous mixing solution, and on this basis, add tetrabutylammonium hexafluorophosphate accounting for 2% of the mass fraction of the spinning solution and stir at room temperature for 6 hours to form a uniform and stable spinning solution.
[0032] (2) Slowly add the spinning solution configured in the above step (1) into the syringe, the inner diameter of the needle used is 0.35mm, and the extrusion rate of the needle solution is 0.4mL h -1 . A rotating cylinder covered with aluminum foil serves as a receiving device, and the receiving distance between the syringe tip and the collector is 13 cm. During the electrospinning process, the applied electrostatic voltage is 20KV. After the solvent evaporates, the aramid polymer fibe...
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