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Preparation and Properties of Polysulfonamide Based Li-S Batteries Separator |
Received:December 22, 2023 |
DOI:10.11980/j.issn.0254-508X.2024.02.012 |
Key Words:polysulfonamide electrostatic repulsion phase transformation polysulfide |
Fund Project:生物质化学与材料国际联合研究中心(2018GHJD-19);国家自然科学基金(22078187);陕西省重点产业创新链项目(2020ZDLGY11-03)。 |
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Abstract:A-PSA separator was prepared via phase transformation method using aromatic sulfone (PSA) fiber without loss of its thermal stability (shrinkage of 0 at 200 ℃), which showed asymmetric pore structure (positive side pore size less than 2 nm). Alkalization treatment improved electrolyte infiltration (340.5%) and electronegativity of the A-PSA separator. The space barrier and electrostatic shielding cooperative strategy was used to limit the shuttle of polysulfide. The results showed that Li-S batteries equipped with A-PSA separator had a lower electrochemical impedance and higher ionic conductivity (1.23 mS/cm), with the capacity retention rate (89.1%) was higher than that of PP separator (58.7%) after 100 cycles. |
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