Lithium-sulfur battery diaphragm, preparation method thereof and lithium-sulfur battery
A lithium-sulfur battery and separator technology, applied in the lithium-sulfur battery separator and its preparation, and the field of lithium-sulfur batteries, can solve the problems of restricting the application of lithium-sulfur batteries, reducing battery energy density, unfavorable large-scale production, etc. The effect of low cost and improved cycle stability
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Embodiment 1
[0062] This embodiment provides a lithium-sulfur battery separator, the front SEM image of which is as follows figure 1 As shown, the cross-sectional SEM image is shown in figure 2 As shown, the lithium-sulfur battery diaphragm includes a diaphragm substrate and a diaphragm coating disposed on the surface of the diaphragm substrate, and the diaphragm coating includes Fe 3 o 4 / carbon nanotube / carbon fiber composite, PVDF and conductive carbon black, with the Fe 3 o 4 / The mass of carbon nanotubes / carbon fiber composites is 100%, the Fe 3 o 4 The content of carbon nanotubes is 60%, the content of carbon nanotubes is 35%, the content of carbon fibers is 5%, and the separator matrix is polypropylene separator (celgard 2500).
[0063] The preparation method of the lithium-sulfur battery separator described in this embodiment comprises the following steps:
[0064] (1) Dissolve ferric chloride and sodium oleate at a molar ratio of 1:2.9 in a mixed solvent of ethanol, d...
Embodiment 2
[0070] This embodiment provides a lithium-sulfur battery diaphragm, the lithium-sulfur battery diaphragm includes a diaphragm substrate and a diaphragm coating disposed on the surface of the diaphragm substrate, and the diaphragm coating includes Fe 3 o 4 / carbon nanotube / carbon fiber composite, PVDF and conductive carbon black, with the Fe 3 o 4 / The mass of carbon nanotubes / carbon fiber composites is 100%, the Fe 3 o 4 The content of carbon nanotubes is 70%, the content of carbon nanotubes is 25%, the content of carbon fibers is 5%, and the separator matrix is polypropylene separator (celgard 2500).
[0071] The preparation method of the lithium-sulfur battery separator described in this embodiment comprises the following steps:
[0072](1) Dissolve ferric chloride and sodium oleate at a molar ratio of 1:2.5 in a mixed solvent of ethanol, distilled water and n-hexane with a volume ratio of 4:3:7, put it into a magnetic rotor, and heat at 60°C And reflux for 6h, th...
Embodiment 3
[0077] This embodiment provides a lithium-sulfur battery diaphragm, the lithium-sulfur battery diaphragm includes a diaphragm substrate and a diaphragm coating disposed on the surface of the diaphragm substrate, and the diaphragm coating includes Fe 3 o 4 / carbon nanotube / carbon fiber composite, PVDF and conductive carbon black, with the Fe 3 o 4 / The mass of carbon nanotubes / carbon fiber composites is 100%, the Fe 3 o 4 The content of carbon nanotubes is 40%, the content of carbon nanotubes is 50%, the content of carbon fibers is 10%, and the separator matrix is polypropylene separator (celgard 2500).
[0078] The preparation method of the lithium-sulfur battery separator described in this embodiment comprises the following steps:
[0079] (1) Dissolve ferric chloride and sodium oleate in a molar ratio of 1:3 in a mixed solvent of ethanol, distilled water and n-hexane with a volume ratio of 4:3:7, put it into a magnetic rotor, and heat at 70°C And reflux for 3h, th...
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