一种基于PVDF / C fiber / BN的自支撑载体及其制备方法和应用
By using a PVDF/C fiber/BN self-supporting carrier, the problem of synergistic effect between lithium and sulfur electrodes in lithium-sulfur batteries was solved, achieving uniform lithium deposition at the negative electrode and lithium sulfide conversion at the positive electrode, thus improving the electrochemical performance and cycle stability of lithium-sulfur batteries.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- NINGBO INST OF NORTHWESTERN POLYTECHNICAL UNIV
- Filing Date
- 2023-05-29
- Publication Date
- 2026-07-17
AI Technical Summary
The self-supporting carriers prepared by conventional methods rely heavily on the synergistic effect between lithium and sulfur electrodes. They cannot simultaneously deposit/strip lithium uniformly on the negative electrode and accelerate the conversion of sulfur and lithium sulfide on the positive electrode side, resulting in poor performance of lithium-sulfur batteries.
A PVDF/C fiber/BN self-supporting carrier was prepared by electrospinning to form a lithiophilic gradient C@BN layer and a porous carbon fiber layer, which were then combined with a lithiophore-repellent PVDF layer to construct a three-dimensional self-supporting carrier, thereby achieving uniform lithium deposition in the negative electrode and lithium sulfide conversion in the positive electrode.
Uniform lithium deposition and stripping of the negative electrode were achieved, the polysulfide shuttle effect was suppressed, the electrochemical performance and cycle stability of lithium-sulfur batteries were improved, and the application range of carrier materials was broadened.
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Figure CN116791275B_ABST