Composite electrolyte membrane based on functional polymer and preparation method thereof, and lithium-sulfur secondary cell
A composite electrolyte membrane and polymer technology, applied in the field of rechargeable lithium-sulfur batteries, can solve problems such as the deterioration of cycle performance of lithium-sulfur batteries, and achieve the effects of solving technical problems of performance degradation, suppressing migration loss, and improving cycle stability.
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[0048] A lithium-sulfur secondary battery of the present invention includes a positive electrode, a negative electrode, an electrolyte, and an organic electrolyte.
[0049] The electrolyte in this embodiment uses a composite electrolyte membrane specially made by the present invention.
[0050] The positive pole piece of the positive electrode in this embodiment is generally composed of a current-conducting current collector and a positive electrode active material, conductive material, adhesive, and other additives coated on the current collector; the positive electrode active material in this embodiment is selected as a simple substance Sulfur; the conductive material is a carbon-based conductive agent, such as conductive carbon black, acetylene black or graphite powder; the binder is polyvinylidene fluoride; wherein the mass percentages of the positive electrode active material, the conductive material and the binder are respectively 70%, 19%, and 11%; the curr...
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